DCT

2:26-cv-10111

Natural Extraction Systems LLC v. Stiiizy Inc

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 2:26-cv-10111, E.D. Mich., 01/12/2026
  • Venue Allegations: Venue is alleged to be proper in the Eastern District of Michigan because Defendants maintain regular and established places of business in the district, including dispensaries and a cannabis processing facility, and have allegedly committed acts of patent infringement within the district.
  • Core Dispute: Plaintiff alleges that Defendants' processes for manufacturing cannabis distillates, and the resulting products sold under the "Stiiizy" brand, infringe four U.S. patents related to methods for chemically modifying cannabinoids.
  • Technical Context: The technology concerns methods for efficiently converting cannabinoid acids (e.g., non-psychoactive THCA) into their active forms (e.g., psychoactive THC) through a process known as decarboxylation, which is fundamental to producing high-purity distillates for consumer cannabis products.
  • Key Procedural History: The complaint notes that all four asserted patents claim priority to a U.S. provisional application filed on August 10, 2018, establishing a common technical background and priority date for the patent family. No prior litigation or post-grant proceedings are mentioned.

Case Timeline

Date Event
2018-08-10 Earliest Priority Date for all Asserted Patents ('235 Provisional Application)
2020-06-02 '248 Patent Issued
2021-02-23 Defendant Focus Group Enterprises, LLC receives prequalification approval in Michigan
2021-01-01 Defendant Ferndale allegedly acquired Defendant Focus (approximate date)
2023-03-01 Shryne Group, Inc. allegedly merged with Defendant Stiiizy Inc. (approximate date)
2023-05-09 '402 Patent Issued
2025-05-13 '181 Patent Issued
2025-06-25 Date of website article describing Defendant Stiiizy's sponsorship of a music festival
2025-09-23 '214 Patent Issued
2026-01-12 Complaint Filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 10,669,248

  • Patent Identification: U.S. Patent No. 10,669,248 ("Methods to Chemically Modify Cannabinoids"), issued June 2, 2020 Compl. ¶159
  • The Invention Explained:
    • Problem Addressed: The patent addresses the inefficiency of traditional cannabinoid decarboxylation, where prolonged heating used to convert cannabinoid acids (like THCA) into their active forms (like THC) also creates undesirable byproducts (like CBN, which causes drowsiness) and degrades other valuable compounds '248 Patent, col. 1:15-34
    • The Patented Solution: The invention proposes performing the decarboxylation reaction in the gas phase, rather than the liquid phase, to lower the reaction's activation energy '248 Patent, col. 5:5-10 The process involves rapidly vaporizing a cannabinoid composition, allowing the chemical conversion to occur in the gas phase, and then immediately condensing the resulting activated cannabinoid into a liquid distillate, thereby minimizing exposure to heat and the formation of impurities '248 Patent, col. 2:18-24 '248 Patent, Fig. 1
    • Technical Importance: This approach allows for the high-yield, high-purity production of desirable cannabinoids on a commercial scale, which is critical for creating consistent and effective consumer products '248 Patent, col. 5:26-34
  • Key Claims at a Glance:
    • The complaint asserts independent claims 1, 2, 8, and 12 Compl. ¶¶172-176
    • Independent Claim 1 recites a method with the core steps of: (1) providing a cannabinoid composition containing a native cannabinoid with a carboxyl group; (2) applying sufficient energy to convert it into a modified cannabinoid in a gas phase; (3) condensing it into a liquid distillate with at least 95% conversion efficiency; and (4) collecting the distillate Compl. ¶172
    • Independent Claim 2 is similar to Claim 1 but replaces the 95% conversion limitation with a requirement that the final distillate comprises the condensed cannabinoid and the byproduct cannabinol (CBN) at a molar ratio greater than 100:1 Compl. ¶173
    • Independent Claim 8 adds a limitation of "coating a heated surface with the composition at a surface-area-to-volume ratio... greater than 500 per meter" Compl. ¶174
    • Independent Claim 12 requires the initial composition itself to have a "surface-area-to-volume ratio greater than 1000 per meter" Compl. ¶175

U.S. Patent No. 11,643,402

  • Patent Identification: U.S. Patent No. 11,643,402 ("Gas Phase Methods to Decarboxylate Cannabinoids"), issued May 9, 2023 Compl. ¶162
  • The Invention Explained:
    • Problem Addressed: As with the parent '248 Patent, this patent addresses the problem that conventional heating methods for decarboxylation are slow and produce undesirable chemical modifications in the final cannabinoid product '402 Patent, col. 1:19-32
    • The Patented Solution: The patent discloses a gas-phase decarboxylation method that emphasizes maximizing the surface-area-to-volume ratio of the starting material (greater than 1000 per meter) to facilitate rapid and efficient energy transfer, conversion to the gas phase, and subsequent condensation into a purified distillate '402 Patent, col. 2:49-55 '402 Patent, col. 1:49-2:2
    • Technical Importance: The focus on maximizing the surface-area-to-volume ratio provides a specific, quantifiable parameter to achieve efficient, high-purity decarboxylation on a commercial scale.
  • Key Claims at a Glance:
    • The complaint asserts independent claim 1 and dependent claims 8, 14, 15, and 18 Compl. ¶¶229-234
    • Independent Claim 1 recites a method of chemically modifying a cannabinoid molecule, comprising the steps of: (1) providing a cannabinoid composition with a surface-area-to-volume ratio greater than 1000 per meter; (2) contacting it with sufficient energy for gas-phase conversion; (3) condensing the gas into a liquid distillate; and (4) collecting the distillate Compl. ¶229
    • The complaint also asserts dependent claims that add limitations, including conductive heating (Claim 8), specific final concentrations of THC/CBD and CBN (Claim 14), the presence of cannabigerol (CBG) (Claim 15), and starting with cannabigerolic acid (Claim 18) Compl. ¶¶230-233

Multi-Patent Capsule: U.S. Patent No. 12,297,181

  • Patent Identification: U.S. Patent No. 12,297,181 ("Methods to Chemically Modify Cannabinoids"), issued May 13, 2025 Compl. ¶165
  • Technology Synopsis: This patent discloses methods for chemically modifying cannabinoids from Cannabis plant extracts by coating a heated surface of a thin-film evaporator with the extract at a high surface-area-to-volume ratio '181 Patent, col. 8:44-54 The method is performed to achieve gas-phase conversion while specifically limiting the formation of byproducts, such that the resulting distillate contains the desired cannabinoid and cannabinol (CBN) at a molar ratio greater than 100:1 '181 Patent, col. 9:20-27
  • Asserted Claims: The complaint asserts independent claims 1, 2, and 9, as well as dependent claims 3, 4, 19, and 21 Compl. ¶¶262-269
  • Accused Features: The complaint alleges that Defendants' use of wiped-film distillation systems, which are a type of thin-film evaporator, to process cannabis extracts infringes the '181 Patent Compl. ¶271 Compl. ¶275

Multi-Patent Capsule: U.S. Patent No. 12,420,214

  • Patent Identification: U.S. Patent No. 12,420,214 ("Methods to Produce Products Comprising Cannabinoids"), issued September 23, 2025 Compl. ¶168
  • Technology Synopsis: This patent covers a method to produce a final cannabinoid product by starting with a specific oil composition (e.g., <15% water, >1% THCA), heating it on a surface under vacuum to cause conversion via conduction, and condensing the resulting modified cannabinoid (THC) into a distillate in less than 360 seconds '214 Patent, col. 12:1-21 Compl. ¶285 The method further includes steps for incorporating this distillate into a final product, such as filling it into a vaporizer cartridge Compl. ¶280
  • Asserted Claims: The complaint asserts independent claims 1 and 18, along with numerous dependent claims including 2, 4-6, 8, 11, and 18-20 Compl. ¶¶278-288
  • Accused Features: The accused features include Defendants' alleged use of wiped-film and short-path distillation systems to create cannabis distillates and the subsequent use of that distillate to fill vaporizer cartridges for sale Compl. ¶290 Compl. ¶304

III. The Accused Instrumentality

  • Product Identification: The accused instrumentalities are the processes used by Defendants to manufacture cannabis distillate and the resulting products, particularly those sold under the "Stiiizy" brand, including vape pods (e.g., "Do-Si-Dos THC Pod," "Skywalker OG vape pod"), all-in-one vape pens, and edibles ("Mango Tango Gummies") Compl. ¶¶17-18 Compl. ¶188 Compl. ¶189
  • Functionality and Market Context: The complaint alleges Defendants employ "wiped-film distillation" systems to process cannabis extracts into high-purity distillates Compl. ¶209 Compl. ¶222 This process is alleged to involve heating a thin film of cannabis oil on a surface to simultaneously evaporate and decarboxylate native cannabinoids (e.g., THCA) into their modified, active forms (e.g., THC) in a gas phase Compl. ¶¶213-215 This gas is then allegedly re-condensed into a liquid distillate that serves as the base for Defendants' products Compl. ¶216 Compl. ¶194 Exhibit K includes a table from a Michigan Regulatory Agency report showing the "Prequalification Approval" for Defendant Focus Group Enterprises, LLC, which supports the allegation of its business operations in the cannabis sector Compl. Ex. K, p. 2 The complaint positions Defendants as major operators in the U.S. cannabis market, generating hundreds of millions of dollars in revenue from the sale of these products Compl. ¶11 Compl. ¶13

IV. Analysis of Infringement Allegations

'248 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
A method to chemically modify a cannabinoid molecule, comprising: providing a composition comprising cannabinoids, in which the cannabinoids comprise a native cannabinoid molecule, the native cannabinoid molecule comprises a carboxyl group, and the native cannabinoid molecule is in a liquid phase or a solid phase; Defendants are alleged to provide liquid cannabis oil extracts that contain native, carboxyl-group-bearing cannabinoids like THCA and CBDA. ¶178; ¶181; ¶211 col. 7:20-29
contacting the composition with sufficient energy to convert the native cannabinoid molecule into (i) a carbon dioxide molecule and (ii) a modified cannabinoid molecule in a gas phase; Defendants allegedly operate wiped-film distillation systems that heat the cannabis extract, causing it to evaporate and decarboxylate (convert THCA/CBDA into THC/CBD) in a gas phase. ¶213; ¶214; ¶215 col. 7:9-14
contacting the modified cannabinoid molecule with a heat sink to condense the modified cannabinoid molecule into a condensed cannabinoid molecule in a liquid distillate, The accused wiped-film systems allegedly include condensers that function as heat sinks to condense the gas-phase THC/CBD back into a liquid distillate. ¶216; ¶217 col. 7:15-19
in which at least 95% of the native cannabinoid molecule is converted into the condensed cannabinoid molecule per mole; and The complaint alleges Defendants' process achieves at least 95% conversion, citing as evidence final products that contain THC and CBD with no detectable THCA or CBDA. ¶219; ¶220 col. 14:15-19
collecting the liquid distillate. Defendants are alleged to collect the resulting liquid distillate from their wiped-film systems for use in consumer products. ¶218 col. 7:20

'402 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
A method to chemically-modify a cannabinoid molecule, comprising: providing a composition comprising cannabinoids, wherein the composition has a surface-area-to-volume ratio that is greater than 1000 per meter;... Defendants allegedly use wiped-film distillation systems that spread cannabis extract into a thin film (100-500 microns), which Plaintiff alleges results in a surface-area-to-volume ratio exceeding 1000 per meter. ¶227; ¶238; ¶239 col. 2:50-55
the cannabinoids comprise a native cannabinoid molecule; the native cannabinoid molecule comprises a carboxyl group; and the native cannabinoid molecule is in either a liquid phase or a solid phase; As described for the '248 patent, Defendants allegedly start with liquid cannabis extracts containing native cannabinoids like THCA and CBGA, which include carboxyl groups. ¶211; ¶247; ¶248 col. 2:55-60
contacting the composition with sufficient energy to convert the native cannabinoid molecule into (i) a carbon dioxide molecule and (ii) a modified cannabinoid molecule in a gas phase; As described for the '248 patent, the accused wiped-film systems allegedly heat the thin film of extract to cause simultaneous evaporation and decarboxylation into a gas phase. ¶213; ¶256 col. 2:61-65
contacting the modified cannabinoid molecule with a heat sink to condense the modified cannabinoid molecule into a condensed cannabinoid molecule in a liquid distillate; and As described for the '248 patent, the accused systems allegedly use condensers to cool the cannabinoid gas back into a liquid distillate. ¶216; ¶217; ¶257 col. 2:66-3:2
collecting the liquid distillate. As described for the '248 patent, Defendants allegedly collect the final distillate for use in their products. ¶218 col. 3:3
  • Identified Points of Contention:
    • Scope Questions: A central dispute may concern the quantitative limitations in the claims. For example, for the '248 and '181 patents, a question is whether the ratio of cannabinol (CBN) in the accused products is low enough to meet the "greater than 100:1" molar ratio requirement Compl. ¶173 Compl. ¶262 For the '402 patent, a question is whether the thin film in Defendants' process factually results in a "surface-area-to-volume ratio that is greater than 1000 per meter" Compl. ¶229
    • Technical Questions: The complaint's allegations regarding the internal operating parameters of Defendants' proprietary distillation systems are made "on information and belief" (e.g., Compl. ¶209; Compl. ¶212). A key question is what evidence Plaintiff can obtain through discovery to prove that the accused "wiped-film distillation" apparatuses function precisely as claimed, particularly regarding energy input, residence time, and conversion efficiencies.
    • Prior Art Questions: The use of wiped-film distillation for purifying cannabis extracts is a known technique. A question for the court may be whether the specific combination of steps and parameters recited in the asserted claims, such as achieving gas-phase decarboxylation within specific efficiency or purity bounds, is non-obvious over existing distillation methods.

V. Key Claim Terms for Construction

Term: "sufficient energy" ('248 Patent, Claim 1; '402 Patent, Claim 1)

  • Context and Importance: This term is critical because the amount of energy applied is central to the invention's goal of achieving rapid decarboxylation without causing thermal degradation. The infringement analysis will depend on whether the energy used in the accused process falls within the scope of what the patent teaches as "sufficient." Practitioners may focus on this term because the specification provides quantitative examples (e.g., "2 kilojoules to 50 kilojoules of energy per gram"), creating a potential battleground over whether the claim term should be limited to these disclosed ranges '248 Patent, col. 11:15-22
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: The claim language is functional, defining the energy by its result: "to convert the native cannabinoid molecule into... a modified cannabinoid molecule in a gas phase" Compl. ¶172 Plaintiff may argue that any energy level that achieves this outcome infringes, regardless of the specific numerical value, pointing to the specification's disclosure of multiple heating methods (convective, conductive, irradiative) as evidence of breadth '248 Patent, col. 11:35-51
    • Evidence for a Narrower Interpretation: The specification discloses specific quantitative ranges, such as "2 kJ to 50 kJ per gram of the composition" and rates of "less than 100 kilowatts of power per gram" for "less than 60 seconds" '248 Patent, col. 11:15-34 Defendants may argue that these disclosures define and limit the scope of "sufficient energy" to these ranges, seeking to distinguish their own process parameters.

Term: "surface-area-to-volume ratio" ('248 Patent, Claim 8; '402 Patent, Claim 1)

  • Context and Importance: This quantitative limitation is a key element in several independent claims and is presented as a critical factor for achieving the invention's rapid, efficient conversion. The dispute will turn on the factual question of whether the thin film created in Defendants' apparatus meets the numerical thresholds of ">500 per meter" or ">1000 per meter."
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: Plaintiff may argue the term should be given its plain and ordinary meaning, calculated based on the physical geometry of the film in the accused device. The patent identifies this ratio as a parameter that yields "marked improvements," suggesting it is a key inventive concept applicable to any apparatus that achieves it '248 Patent, col. 6:5-10
    • Evidence for a Narrower Interpretation: The primary dispute here is likely to be factual rather than a pure construction issue. However, Defendants could argue that the patent's method for conceptualizing this ratio, which is discussed in the context of ground particulates, is not directly applicable to the fluid dynamics of a liquid thin film in their specific wiped-film evaporator '248 Patent, col. 17:1-4 This raises the question of how the ratio should be measured in the accused process and whether it aligns with the patent's teaching.

VI. Other Allegations

  • Indirect Infringement: The complaint alleges that Defendants Stiiizy Inc. and Stiiizy IP induced infringement by actively and knowingly instructing, directing, and advising their subsidiaries (Focus and Ferndale) and licensees to perform the patented processes Compl. ¶313 Compl. ¶329 The complaint alleges this control is exercised through, for example, the establishment of standard operating procedures for manufacturing the accused products Compl. ¶319 Compl. ¶335
  • Willful Infringement: The complaint does not plead willfulness as a separate count but does request a "judgment declaring that Defendants' infringement has been willful" and awarding enhanced damages in its prayer for relief Compl. prayer (e) The basis for this claim is alleged knowledge of the patents "at least as of the filing date of this complaint," suggesting a theory of post-suit willful infringement Compl. ¶311 Compl. ¶327

VII. Analyst's Conclusion: Key Questions for the Case

  • Evidentiary Proof of Process: A central issue will be one of process verification: can the Plaintiff, through discovery, uncover sufficient evidence to prove that Defendants' proprietary, internal manufacturing processes operate within the specific, quantitative limitations recited in the claims, such as the surface-area-to-volume ratios, conversion efficiencies, and byproduct purity levels? The complaint's reliance on "information and belief" for these technical details places a high burden on discovery.
  • Claim Scope and Non-Obviousness: A key legal question will be one of inventive scope: does the patents' focus on gas-phase decarboxylation using high surface areas and rapid condensation represent a non-obvious improvement over prior art distillation techniques, like wiped-film evaporation, that were already known in the chemical arts? The case may turn on whether the specific parameters claimed provide an inventive leap or merely describe the optimal operation of existing technology.
  • Corporate Liability and Control: A significant legal question will be one of vicarious liability: given the complex corporate structure alleged, where parent and IP-holding entities are distinct from manufacturing and retail subsidiaries Compl. ¶¶34-37 Compl. ¶¶52-54, can Plaintiff demonstrate the requisite "direction or control" to hold Defendants Stiiizy Inc. and Stiiizy IP liable for the direct infringement allegedly carried out by Defendants Focus and Ferndale?
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