Syngenta Crop Protection AG v. BASF Agricultural Solutions US LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Syngenta Crop Protection AG (Switzerland) and Syngenta Crop Protection, LLC (Delaware)
  • Defendant: BASF Agricultural Solutions US LLC (Delaware)
  • Plaintiff's Counsel: Baker & Hostetler LLP
• Case Identification: Syngenta Crop Protection AG v. BASF Agricultural Solutions US LLC, 1:26-cv-00859, D. Del., 07/14/2026
• Venue Allegations: Venue is alleged to be proper in the District of Delaware under 28 U.S.C. § 1400(b) because the Defendant, BASF Agricultural Solutions US LLC, is a Delaware limited liability company and therefore resides in the district.
• Core Dispute: Plaintiff alleges that Defendant's new herbicide product, Ridivex™, and its instructed combination of existing products, infringe a patent for herbicidal compositions that combine a specific herbicide with a crop safener.
• Technical Context: The technology involves chemical compositions for agriculture that selectively kill weeds while using a "safener" to protect valuable crops from the herbicide's potentially damaging effects.
• Key Procedural History: The complaint alleges that the parties have met on multiple occasions to discuss the patent-in-suit, which may be used to support allegations of pre-suit knowledge for willfulness and indirect infringement. Plaintiff also notes it commercializes the patented technology in its own Storen® product. The complaint pleads subject-matter jurisdiction under 28 U.S.C. §§ 1331 and 1338(a) and personal jurisdiction over BASF, and its Prayer for Relief seeks both a preliminary and permanent injunction supported by an extensive irreparable-harm theory Compl. ¶¶19-34 A related PTAB proceeding, IPR2017-01332, sought cancellation of claims 1-5 and 7-12 of the '618 Patent.

Case Timeline

Date	Event
2004-04-30	'618 Patent Priority Date
2013-03-26	'618 Patent Issue Date
2026-07-14	Complaint Filing Date

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

U.S. Patent No. 8,404,618, "Herbicidal Composition" (Issued Mar. 26, 2013)

The Invention Explained

• Problem Addressed: The patent addresses the problem of phytotoxicity, where herbicides applied to control weeds can also cause damage to the desired crop plants among which the weeds are growing Compl. ¶13 '618 Patent, col. 1:15-18
• The Patented Solution: The invention is a herbicidal composition that combines a specific class of isoxazoline-based herbicides (defined by "formula I") with a "safener" selected from a specified list of chemical compounds. This combination is designed to protect the crop plants from the herbicide's harmful effects while maintaining the herbicide's effectiveness against weeds Compl. ¶13 '618 Patent, abstract '618 Patent, col. 1:7-14
• Technical Importance: This approach allows for the application of effective herbicides to control weeds in valuable crops like maize, wheat, and barley '618 Patent, col. 1:13-15

Key Claims at a Glance

• The complaint asserts infringement of at least claims 1-5 and 7-11 of the '618 Patent, including independent claims 1 and 10 and dependent claims 2-5, 7-9, and 11 Compl. ¶61
• Independent Claim 1 (Composition Claim): This claim is directed to a "herbicidal composition" comprising a mixture of two key components:
  • a) A "herbicidally active amount of a compound of the formula I," which defines a specific genus of chemical structures for the herbicide.
  • b) A "herbicide-antagonistically active amount of a safener" selected from a closed list of specific chemical compounds, which includes, among others, benoxacor and isoxadifen-ethyl.
• Independent Claim 10 (Method Claim): This claim is directed to a "method of combating weeds and weed grasses in crops," which involves treating the plants, seed, or cuttings, or the growing area, simultaneously or at separate times with the formula I herbicide and the safener as defined in claim 1.

III. The Accused Instrumentality

Product Identification

The complaint identifies two accused instrumentalities:

1. BASF's recently announced herbicide product, "Ridivex™" Compl. ¶17
2. The combination of two existing BASF products, "Status®" and "Zidua® SC," used together as allegedly instructed by BASF Compl. ¶18 Compl. ¶62

Functionality and Market Context

• Ridivex™ is alleged to be a composition containing the herbicide pyroxasulfone, along with dicamba and diflufenzopyr ("DFFP"), and a "built-in crop safener" Compl. ¶17 The complaint alleges, upon information and belief, that this safener is isoxadifen-ethyl Compl. ¶17 Compl. ¶39
• The combination of Status® and Zidua® SC is also accused. Zidua® SC contains the herbicide pyroxasulfone, and Status® contains a safener identified in public information as isoxadifen-ethyl Compl. ¶¶17-18 The complaint alleges BASF instructs customers to combine these products for use in corn crops Compl. ¶18
• The complaint alleges that BASF is positioning Ridivex™ as a direct competitor to Syngenta's own commercial product, Storen®, which is covered by the '618 Patent Compl. ¶15 Compl. ¶26
• The complaint further alleges that BASF's own testing of Ridivex™ applications and of the Status®/Zidua® SC combination directly infringes the '618 Patent Compl. ¶60 Compl. ¶62, and pleads irreparable harm-including price erosion and lost distributor windows-to support its request for injunctive relief Compl. ¶¶22-34

IV. Analysis of Infringement Allegations

'618 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A herbicidal composition comprises a mixture of	Ridivex™ is described as a herbicidal composition that includes a mixture of an active herbicide and a safener.	¶39	col. 39:47-49
a) a herbicidally active amount of a compound of the formula I...	The Ridivex™ product is alleged to contain a "herbicidally active amount of pyroxasulfone," which is asserted to be a compound of formula I. The complaint includes a visual diagram of the pyroxasulfone chemical structure.	¶39; ¶40; ¶42	col. 15:24-29; Table 1 (cmpd. 1.27)
b) a herbicide-antagonistically active amount of a safener selected from the group consisting of ... isoxadifen-ethyl ... or a combination thereof.	Ridivex™ is alleged to contain a "herbicide-antagonistically active amount of a safener" which, on information and belief, is isoxadifen-ethyl, a compound explicitly listed in the claim's group of safeners.	¶39	col. 40

• The complaint separately alleges that BASF's testing of, and instruction to combine, Status® and Zidua® SC directly infringes at least claims 1-5 and 7-11 of the '618 Patent Compl. ¶62; the chart above maps only the Ridivex™ product.

• Identified Points of Contention:

  • Factual Question: The complaint's allegation that the safener in Ridivex™ is isoxadifen-ethyl is made "on information and belief" Compl. ¶17 Compl. ¶39 This belief is based on the safener used in BASF's other products and "technical considerations and commercial efficiencies" Compl. ¶17 A central factual dispute may be whether discovery will confirm the precise chemical identity of the safener in Ridivex™ as one of the compounds listed in the claim.
  • Scope Question: The claim requires a "herbicide-antagonistically active amount" of the safener. The question may arise as to what level of crop protection activity is required to satisfy this functional limitation, and whether the amount of safener in the accused products meets that threshold.

V. Key Claim Terms for Construction

• The Term: "herbicide-antagonistically active amount"
• Context and Importance: This functional language appears in both independent claims 1 and 10 and is central to defining the required efficacy of the safener component. The infringement analysis will depend on whether the quantity of safener in the accused products performs the specified function. Practitioners may focus on this term because its construction will set the standard for the evidence needed to prove or disprove infringement of this element.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification broadly describes the purpose of the safener as protecting "crop plants from the damaging action of the herbicide" '618 Patent, col. 1:19-21 Parties advocating for a broader scope may argue that any measurable protective effect satisfies the "active amount" requirement.
  • Evidence for a Narrower Interpretation: The use of the specific term "antagonistically active" could support an argument for a more demanding standard than mere presence. The specification highlights that the "interaction of herbicides and safeners is complex" '618 Patent, col. 1:24-25, which may suggest that a specific, non-trivial level of activity is what the inventors contemplated and patented.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both induced and contributory infringement.
  • Inducement is based on allegations that BASF instructs its customers, through marketing and product information, to use Ridivex™ in a manner that directly infringes method claims 10-11, and separately to combine Status® and Zidua® SC in a manner that meets at least claims 1-5 and 7-11 of the '618 Patent, including composition claims Compl. ¶¶70-71 Compl. ¶75 Compl. ¶78
  • Contributory infringement is based on the allegation that Ridivex™ is specifically made for an infringing use and is not a "staple article or commodity of commerce suitable for substantial non-infringing use" Compl. ¶88
• Willful Infringement: Willfulness is alleged based on Defendant's purported pre-suit knowledge of the '618 Patent. This knowledge is allegedly evidenced by BASF's practice of monitoring Syngenta's patents and by direct discussions between the parties concerning the '618 Patent prior to the lawsuit Compl. ¶35 Compl. ¶63 Compl. ¶73
• Relief Requested and Jury Demand: The complaint seeks a preliminary and permanent injunction, damages in no event less than a reasonable royalty under 35 U.S.C. § 284, enhanced or treble damages for willfulness under 35 U.S.C. § 284, a finding that this is an exceptional case with an award of reasonable attorney fees under 35 U.S.C. § 285, pre- and post-judgment interest and costs, and demands a trial by jury on all issues so triable Compl., Prayer for Relief Compl., Demand for Jury Trial

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

The resolution of this dispute may turn on two central questions:

1. A core question will be one of chemical identity: what is the specific chemical composition of the "built-in crop safener" in BASF's Ridivex™ product? As this allegation is currently based on "information and belief," the evidence obtained during discovery will be critical to establishing a key fact for the direct infringement analysis.
2. A second key issue will concern functional sufficiency: assuming the safener's identity is confirmed, does the amount included in the accused products constitute a "herbicide-antagonistically active amount" as that term is construed? This will likely require the court to define the level of performance required by the claim, followed by a factual determination, potentially involving competing expert analyses, of whether the accused products meet that standard.