Fujian Gutian Daxing v. Xiamen Sunnypet: Pet Hutch Patent Action Dismissed Without Prejudice
Fujian Gutian Daxing Import & Export Co. Ltd. filed a patent infringement suit against Xiamen Sunnypet Products Co. Ltd. in the Western District of Washington, asserting US10687510B2 against the Aivituvin AIR 100 and AIR 100-XL-L pet hutch products. The case was voluntarily dismissed without prejudice under Rule 41(a)(1)(A)(i) just 60 days after filing, before the defendant filed any responsive pleading.
Pet Hutch Patent Spat Ends Quickly, Door Left Open to Refile
On September 4, 2025, Fujian Gutian Daxing Import & Export Co. Ltd. initiated an infringement action against fellow Chinese pet-products manufacturer Xiamen Sunnypet Products Co. Ltd. in the U.S. District Court for the Western District of Washington before Judge Lauren King. The suit centred on US10687510B2, a patent covering pet house/hutch technology, and accused the Aivituvin AIR 100 and Aivituvin AIR 100-XL-L product lines of infringing that patent. Glacier Law LLP represented the plaintiff; no counsel of record appeared for the defendant.
On November 3, 2025 — just 60 days after filing — plaintiff’s counsel filed a notice of voluntary dismissal pursuant to Rule 41(a)(1)(A)(i) of the Federal Rules of Civil Procedure, terminating all claims without prejudice. Because the defendant had not yet filed an answer or a motion for summary judgment, and because no prior federal or state dismissal of the same claims had been made, the one-dismissal rule had not been triggered and the procedural conditions for a Rule 41(a)(1)(A)(i) notice were satisfied. No court order was required.
A 60-day lifecycle ending in a voluntary pre-answer dismissal is consistent with several scenarios common in Chinese-competitor patent enforcement actions: out-of-court settlement, a licensing arrangement, or a tactical decision to refile in a different venue or after further claim mapping. The public record is silent on which of these drove the withdrawal. Critically, the ‘without prejudice’ designation means the plaintiff could refile the same claims against the same defendant at a future date, subject to any applicable statute of limitations.
Filing to Voluntary dismissal in 60 days
60 days — resolved well below the median district court patent case lifecycle
Voluntarily dismissed: what the without-prejudice ruling means for both parties
Rule 41(a)(1)(A)(i): plaintiff’s unilateral exit before answer
Under Rule 41(a)(1)(A)(i), a plaintiff may dismiss an action without a court order at any time before the defendant serves an answer or a motion for summary judgment. Because Xiamen Sunnypet had not filed either, Fujian Gutian Daxing exercised this right as of right. The dismissal required no judicial approval, no fee award, and imposed no merits finding on either party. The ‘first dismissal’ rule was satisfied, so the without-prejudice designation stands.
Pre-answer voluntary exitWithout prejudice: the litigation door remains open
A dismissal without prejudice does not bar the plaintiff from refiling the same claims against the same defendant. This contrasts with a dismissal with prejudice, which would operate as a final adjudication on the merits. The public record here is explicit — ‘without prejudice’ was stated in the notice — so the plaintiff retains its right to re-assert US10687510B2 against Xiamen Sunnypet. Any refile would, however, need to account for applicable limitations periods and any intervening developments in claim scope.
Refile right preservedFujian Gutian Daxing exits cleanly with full optionality intact
By invoking Rule 41(a)(1)(A)(i) before Sunnypet answered, the plaintiff avoided any adverse ruling on the merits of US10687510B2. No claim construction, no invalidity finding, and no fee-shifting order can be entered. The plaintiff retains the patent in its portfolio and the legal right to pursue the same infringement theory at a later date, whether through re-filing, licensing demand, or parallel enforcement in another forum.
Patent portfolio intactSunnypet’s Aivituvin products remain under potential future risk
Although the immediate litigation threat has been removed, the without-prejudice dismissal means Xiamen Sunnypet has not obtained any judicial ruling that the Aivituvin AIR 100 or AIR 100-XL-L products are non-infringing or that US10687510B2 is invalid. The accused products remain commercially vulnerable to a refiled action. Sunnypet and its distributors may wish to consider a freedom-to-operate analysis against US10687510B2 to assess ongoing exposure in the U.S. market.
Exposure not extinguishedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Fujian Gutian Daxing Import & Export Co Ltd | Company | Pet product manufacturer and exporter — holder of US10687510B2 (pet hutch)Search in Eureka ↗ |
| Defendant | Xiamen Sunnypet Products Co Ltd | Company | Xiamen Sunnypet Products Co. Ltd. — pet product manufacturer, maker of Aivituvin pet hutchesSearch in Eureka ↗ |
| Plaintiff counsel | Ruoting Men | Attorney | Counsel for Fujian Gutian Daxing Import & Export Co LtdSearch in Eureka ↗ |
| Plaintiff law firm | GLACIER LAW LLP | Law Firm | Representing Fujian Gutian Daxing Import & Export Co LtdSearch in Eureka ↗ |
| Presiding judge | Judge Lauren King | Judge | Washington Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice expressly invokes Rule 41(a)(1)(A)(i) and confirms all three conditions for a without-prejudice exit as of right: no answer filed, no summary judgment motion filed, and no prior dismissal of the same claims. The explicit recitation of these conditions suggests careful pleading by plaintiff’s counsel to insulate the without-prejudice status from any future challenge. No merits finding was made, and the court issued no order. The case record therefore contains no ruling on infringement, validity, or claim scope of US10687510B2.
US10687510B2 — Pet hutch and outdoor pet shelter structure
US10687510B2 (application number US15/841303) covers a pet house or hutch design — an outdoor shelter structure for companion animals. The patent issued from an application in the pet housing technology space and reflects growing IP activity around premium pet product design as the global pet care market has expanded. The patent’s claims, once construed, would define the specific structural or functional features that competing products must avoid to remain outside the scope of the grant.
In the context of U.S. e-commerce and import enforcement, patents covering consumer pet products have become increasingly significant as Chinese manufacturers seek to protect market position against competing exporters selling through platforms such as Amazon. US10687510B2 was asserted against two specific Aivituvin-branded SKUs, suggesting the plaintiff had conducted at least preliminary claim mapping against those products. For competing pet hutch sellers, the patent represents a monitoring priority, particularly given the without-prejudice dismissal that preserves future enforcement.
Should you run an FTO analysis against US10687510B2?
Any company manufacturing, importing, or distributing outdoor pet hutches, pet houses, or structurally similar animal shelter products for the U.S. market should assess whether its current product designs fall within the claims of US10687510B2. The patent has been actively asserted and no invalidity ruling limits its scope. Retailers and marketplace sellers stocking competing hutch SKUs carry indirect exposure if their suppliers have not cleared the patent.
PatSnap Eureka’s FTO Search Agent can map the independent claims of US10687510B2 against your product’s structural features, flag design-around opportunities, and surface any inter partes review filings or prior art that may affect claim scope. For in-house IP teams and product development leads in the pet housing category, running this analysis now — before a refiled action — is substantially cheaper than responding to a complaint.
Run a freedom-to-operate analysis on US10687510B2 to assess your product’s exposure
Run FTO in Eureka →Similar pet product patent infringement cases in U.S. district courts
Explore comparable patent infringement actions involving pet housing and pet product designs litigated in U.S. district courts, particularly in the Western District of Washington.
What this case signals for the pet product IP enforcement landscape
Short-cycle patent suits between Chinese exporters in U.S. courts are an increasingly visible enforcement tool — this case is consistent with that trend.
Pre-answer dismissals often mask off-record negotiations
A 60-day case lifecycle ending in a Rule 41(a)(1)(A)(i) notice before any defendant appearance is statistically consistent with a rapid out-of-court resolution — whether licensing, a design-around commitment, or a distribution agreement. IP teams monitoring competitor enforcement should treat pre-answer dismissals as potential signals of settlement activity rather than litigation failure.
US10687510B2 remains a live enforcement asset in the pet hutch category
The patent survived this litigation cycle without any invalidity challenge reaching the record. Companies selling pet house or hutch products in the U.S. — particularly those importing competing designs — should assess their exposure to US10687510B2, especially given the plaintiff’s demonstrated willingness to file and the without-prejudice posture that preserves refiling rights.
Fujian v Xiamen — key questions answered
The case was dismissed without prejudice. Plaintiff filed a Rule 41(a)(1)(A)(i) notice on November 3, 2025, expressly stating the dismissal was without prejudice. This preserves the plaintiff’s right to refile the same infringement claims against Xiamen Sunnypet based on US10687510B2 in the future.
US10687510B2 is a U.S. patent covering pet house and hutch structures. In this litigation, it was asserted against the Aivituvin AIR 100 and Aivituvin AIR 100-XL-L pet hutch products sold by Xiamen Sunnypet Products Co. Ltd. No claim construction or invalidity ruling was issued, so the full scope of the patent remains undetermined by this case.
A pre-answer voluntary dismissal after 60 days is consistent with several scenarios: an out-of-court settlement, a licensing agreement, a decision to refile in a different venue, or a determination that further claim mapping is needed. The public record in this case does not reveal which factor applied. Because the dismissal was without prejudice, the litigation door remains open.
No. A without-prejudice dismissal carries no merits determination. No court found the Aivituvin AIR 100 or AIR 100-XL-L products to be non-infringing, nor did any court invalidate US10687510B2. The accused products remain exposed to a refiled infringement action by the same plaintiff or any future assignee of the patent.
Rule 41(a)(1)(A)(i) of the Federal Rules of Civil Procedure permits a plaintiff to dismiss an action without a court order by filing a notice of dismissal before the opposing party serves an answer or a motion for summary judgment. In this case, Xiamen Sunnypet had not filed either, so Fujian Gutian Daxing was entitled to dismiss as of right. The rule also requires that the plaintiff has not previously dismissed a federal or state action based on the same claims — a condition the notice confirmed was satisfied.
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