SharkNinja Operating LLC v. Nanjing Pukou Xisheng New Energy Co Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: SharkNinja Operating LLC and SharkNinja Sales Company (Delaware)
  • Defendant: Nanjing Pukou Xisheng New Energy Co., Ltd. (China)
  • Plaintiff's Counsel: Shook, Hardy & Bacon L.L.P.
• Case Identification: 1:26-cv-12116, D. Mass., 05/08/2026
• Venue Allegations: Venue is alleged to be proper as Defendant, a foreign entity, committed acts of infringement in and transacts business in the District of Massachusetts through interactive e-commerce storefronts.
• Core Dispute: Plaintiff alleges that Defendant's USHALO-branded glass air fryers infringe one design patent and one utility patent related to Plaintiff's Ninja CRISPi line of portable air fryers.
• Technical Context: The technology relates to the field of portable countertop air fryers, specifically those utilizing a glass cooking vessel in conjunction with a removable heating and air-circulation "pod."
• Key Procedural History: The complaint alleges that Plaintiff has provided constructive notice of the patents-in-suit through a public patent-marking webpage, a fact that may become relevant to the calculation of potential damages.

Case Timeline

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

• Patent Identification: U.S. Design Patent No. D1,100,567, "Air Fryer," issued November 4, 2025.

• The Invention Explained:

  • Problem Addressed: Design patents do not articulate a technical problem; they protect the novel, non-obvious ornamental appearance of an article of manufacture.
  • The Patented Solution: The '567 Patent claims the specific ornamental design for a removable air-fryer pod Compl. ¶20 The design features a rounded, top-heavy upper portion with an integrated handle depression, which sits atop a wider, squared-off lower portion that includes venting details and legs '567 Patent, Figs. 1-8
  • Technical Importance: The claimed design provides the distinctive aesthetic for the heating and control unit of Plaintiff's new category of portable air fryers Compl. ¶14

• Key Claims at a Glance:

  • Design patents contain a single claim for the ornamental design as shown in the drawings. The '567 Patent claims: "The ornamental design for an air fryer, as shown and described" '567 Patent, claim

• Patent Identification: U.S. Patent No. 12,426,739, "Cooking devices and components thereof," issued September 30, 2025.

• The Invention Explained:

  • Problem Addressed: The patent background describes conventional air fryers that use cooking drawers, which can be cumbersome and require transferring food to a separate dish for serving or storage '739 Patent, col. 21:40-54
  • The Patented Solution: The invention provides a vessel assembly with an integrated handling solution that allows a user to safely manipulate a hot cooking vessel. A key aspect is a handlebar positioned under the vessel with a "thermal break" gap between the handlebar and the hot vessel wall, which reduces heat transfer and enables safer handling '739 Patent, col. 41:11-22 This facilitates a "cook, serve, and store" workflow in a single container Compl. ¶13
  • Technical Importance: This configuration enhances user safety and convenience by integrating a heat-mitigating handle structure directly with the cooking vessel, distinguishing it from prior art drawer-based systems Compl. ¶¶14, 21-22

• Key Claims at a Glance:

  • The complaint asserts at least Claim 7, an independent claim, and reserves the right to assert others, including Claims 1 and 14 Compl. ¶¶41, 49
  • The essential elements of independent Claim 7 are:
    • A vessel with a cavity for receiving food and an opening for accessing the cavity.
    • A handlebar positioned under the vessel, configured for user contact, and extending upward along a portion of the vessel's height.
    • A gap positioned between the vessel wall and the handlebar, where the gap is configured to be a thermal break.

III. The Accused Instrumentality

• Product Identification: Defendant's "USHALO-branded air-fryer products," specifically identified as a "4-in-1 Glass Air Fryer" (the "Accused Products") Compl. ¶¶4, 27
• Functionality and Market Context:
  • The Accused Products are alleged to be "inferior imitations" and "obvious knock-off[s]" of SharkNinja's Ninja CRISPi product, sold through online marketplaces like Amazon.com Compl. ¶¶4, 25, 41
  • Functionally, the products are alleged to operate in the same manner as the Ninja CRISPi, using a removable top air-fryer unit with a separate glass cooking vessel that sits in a plastic base or cradle Compl. ¶¶27, 41 The complaint alleges this base includes a handlebar and a gap that provides a thermal break, mirroring the configuration claimed in the '739 Patent Compl. ¶¶45-46

IV. Analysis of Infringement Allegations

The complaint alleges that the overall appearance of the Accused Products is "substantially the same" as the design claimed in the '567 Patent Compl. ¶33 A side-by-side comparison image in the complaint shows the Accused Product next to Plaintiff's Ninja CRISPi product, highlighting similarities in the shape of the top pod, handle placement, and overall profile Compl. ¶28 The complaint further provides direct comparisons between figures from the '567 Patent and photographs of the USHALO product to support its allegation of design appropriation Compl. ¶34

'739 Patent Infringement Allegations

• Identified Points of Contention:
  • Scope Questions (Design): The central question for the '567 Patent will be whether an "ordinary observer," familiar with the prior art, would be deceived into purchasing the USHALO product believing it to be the SharkNinja product. The analysis will focus on the overall visual impression created by the accused design compared to the patented design.
  • Scope Questions (Utility): The infringement analysis for the '739 Patent may raise the question of whether the accused product's plastic base/cradle falls within the scope of the term "handlebar" as used in the patent.
  • Technical Questions (Utility): A key dispute may be whether the gap in the accused product is "configured to be a thermal break," as required by the claim. This is a functional limitation. The court will need to determine if the gap is merely an incidental feature of the product's construction or if it was designed with the specific purpose of insulating the handle from the hot vessel.

V. Key Claim Terms for Construction

• The Term: "handlebar"

• Context and Importance: This term is critical because the infringement allegation hinges on mapping the accused product's plastic vessel cradle/base to this claim element. Defendant may argue its product has a "base," not a "handlebar," in an attempt to avoid infringement. Practitioners may focus on this term because its construction will determine if a multi-component support structure can be considered a single "handlebar."

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: Claim 7 itself describes the handlebar as being "positioned under the vessel" and "extending upward along a portion of a height of the vessel," which is consistent with a cradle-like structure '739 Patent, col. 41:16-19 The specification also depicts the handlebar as part of a larger base assembly '739 Patent, Figs. 30-32
  • Evidence for a Narrower Interpretation: Some embodiments in the specification show a more distinct, bar-like handle structure that is part of a base '739 Patent, Figs. 12A-12B, element 1616a A party could argue these more specific examples limit the term's scope to something more than just the sides of a base.

• The Term: "configured to be a thermal break"

• Context and Importance: This functional language requires not just the presence of a gap, but that the gap serves a specific purpose. Infringement will depend on whether Plaintiff can prove the accused product's gap was designed for thermal insulation. Practitioners may focus on this term because it links a structural feature (the gap) to an intended function (thermal break), creating a high bar for proof.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The patent repeatedly links the "gap" to its function. Claim 7 explicitly states "the gap configured to be a thermal break" '739 Patent, col. 41:21-22 The summary and detailed description also reference this functional relationship, suggesting any gap that achieves this purpose could be covered '739 Patent, col. 12:30-34
  • Evidence for a Narrower Interpretation: A defendant could argue that to be "configured," the gap must result from specific design choices intended to create a thermal break, rather than being an incidental byproduct of manufacturing tolerances or component assembly. The complaint attempts to preempt this by pointing to "ribs" on the accused product's handlebar that "necessarily form the spacing of the gap," suggesting a deliberate design Compl. ¶46

VI. Other Allegations

• Indirect Infringement: The complaint includes a boilerplate allegation of indirect infringement Compl. ¶3 but does not provide specific factual support beyond what is alleged for direct infringement. The formal counts for relief are for direct infringement only Compl. ¶¶29, 37
• Willful Infringement: The complaint does not use the term "willful infringement." However, it lays a foundation for a willfulness claim by alleging Defendant had knowledge of the patents, at a minimum, from the filing date of the complaint Compl. ¶¶35, 50 It also alleges constructive notice through Plaintiff's patent marking webpage since November 2025 Compl. ¶¶35, 50 The complaint's characterization of the Accused Product as an "obvious knock-off" and "intentionally designed to copy" could also be used to argue for willfulness Compl. ¶41

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

1. Design Similarity vs. Distinction: For the design patent, the primary issue will be a visual one: does the USHALO air fryer pod create an overall ornamental impression that is substantially the same as the '567 Patent's design in the eyes of an ordinary observer, or are there sufficient visual differences to avoid infringement?

2. Definitional Scope: A core issue for the utility patent will be one of claim construction: can the term "handlebar", as defined and described in the '739 Patent, be construed to read on the multi-part plastic cradle that supports the accused product's glass vessel?

3. Functional Equivalence: A key evidentiary question will be whether the gap between the accused product's vessel and its base is merely incidental or is "configured to be a thermal break" as functionally required by Claim 7. The outcome may depend on evidence related to the design, manufacturing, and thermal performance of the accused product.