Huang v. Shenzhen Zhaocheng Technology: Pet Tent Patent Action Dismissed in 1 Day
William Huang filed a patent infringement action in the Northern District of Illinois against Shenzhen Zhaocheng Technology Co., Ltd. covering pet tent utility and design patents including US11939786B1. The case was voluntarily dismissed without prejudice less than 24 hours after filing — before the defendant served any answer or motion.
A one-day patent filing: strategic probe or procedural placeholder?
On 17 September 2025, William Huang, represented by Alioth Law LLP, filed a patent infringement action in the Northern District of Illinois (Case No. 1:25-cv-11241) against Shenzhen Zhaocheng Technology Co., Ltd. and related defendants. The asserted patents — US11939786B1, USD0971526S, and USD0982583S — cover pet tent products, encompassing both utility and ornamental design protections.
The case was voluntarily dismissed the following day, 18 September 2025, pursuant to Rule 41(a)(1)(B) of the Federal Rules of Civil Procedure. The plaintiff confirmed that the defendant had not yet served an answer or motion for summary judgment, satisfying the procedural prerequisite for a dismissal without prejudice as of right. No judicial intervention was required to close the matter.
A one-day litigation window is highly atypical and may suggest a strategic rationale — such as using the filing to facilitate settlement negotiations, preserve a filing date, or test the defendant’s response posture — rather than a commitment to full merits adjudication. The public record does not disclose whether any parallel resolution or licensing discussion preceded or accompanied the dismissal.
Filing to Voluntary dismissal in 1 days
Closed within 1 day — among the shortest district court patent case durations on record
Voluntarily dismissed: what Rule 41 means for both parties
Rule 41(a)(1)(B) dismissal: no court order needed
Under Federal Rule of Civil Procedure 41(a)(1)(B), a plaintiff may dismiss an action without a court order by filing a notice of dismissal before the defendant serves an answer or a motion for summary judgment. Huang’s notice satisfied that condition. The dismissal is effective upon filing and requires no judicial approval, making it one of the cleanest and fastest exits available in federal civil litigation.
Procedural right — no court orderWithout prejudice — but the public record is silent on terms
The dismissal was expressly filed without prejudice, meaning Huang retains the right to refile the same claims against Shenzhen Zhaocheng Technology on the same patents in a future action, subject to applicable statutes of limitation. It is important to distinguish this from a dismissal with prejudice, which would permanently bar refiling. Whether any side agreement — such as a licensing deal or covenant not to sue — accompanied this dismissal is not disclosed in the public record.
Refiling rights preservedDefendant exits without any merits ruling or admission
Because the case closed before Shenzhen Zhaocheng Technology served an answer or motion, the defendant made no formal appearance and faces no adverse finding on infringement or validity. The defendant retains all defenses — including invalidity and non-infringement — should Huang refile. However, the filing itself signals that the plaintiff views the asserted patents as commercially significant and is willing to pursue enforcement action.
No merits ruling against defendantPet tent IP: enforcement signals for cross-border sellers
The willingness to file — even briefly — against a Shenzhen-based manufacturer in a U.S. federal court over pet tent utility and design patents suggests active enforcement posture by the patent holder. Cross-border e-commerce sellers and importers of similar pet shelter products should treat this filing as an early indicator of enforcement intent. Design patent claims in particular can be especially powerful against look-alike products, as the ornamental similarity standard is relatively accessible for plaintiffs.
Cross-border enforcement signalFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | William Huang | Individual | Pet product IP holder — asserting US11939786B1, USD0971526S, and USD0982583SSearch in Eureka ↗ |
| Defendant | Shenzhen Zhaocheng Technology Co., Ltd. et al. | Company | Shenzhen-based technology manufacturer accused of infringing pet tent patentsSearch in Eureka ↗ |
| Plaintiff counsel | Huicheng Zhou | Attorney | Counsel for William HuangSearch in Eureka ↗ |
| Plaintiff law firm | Alioth Law LLP | Law Firm | Representing William HuangSearch in Eureka ↗ |
| Presiding judge | Judge Georgia N. Alexakis | Judge | Illinois Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The plaintiff’s notice invokes Rule 41(a)(1)(B) expressly, confirming the dismissal is without prejudice and requires no court order. Critically, the notice confirms the defendant had not answered — meaning no ‘first voluntary dismissal’ rule complications arise that could convert a future filing into a with-prejudice dismissal. The phrasing preserves maximum flexibility for the patent holder while creating no enforceable concession from the defendant on infringement or validity.
US11939786B1, USD0971526S & USD0982583S — Pet Tent IP Portfolio
US11939786B1 is a utility patent covering the structural and functional aspects of pet tent products — collapsible or portable shelter designs intended for domestic animals. The two accompanying design patents, USD0971526S and USD0982583S, protect the ornamental visual appearance of specific pet tent configurations. Together, the portfolio provides layered protection: functional claims under the utility patent and visual identity claims under the design patents, covering both how the product works and how it looks.
This multi-layered patent portfolio is strategically significant in the competitive pet accessories market, where Chinese manufacturers frequently produce near-identical or visually similar products for U.S. e-commerce channels. Utility and design patent portfolios in combination present a higher enforcement barrier for competitors, since design-around strategies that preserve function may still infringe the ornamental claims. Any company importing, distributing, or retailing comparable pet tent products in the U.S. should assess exposure across all three patents.
Should you run an FTO against US11939786B1 and the pet tent design patents?
If your organisation manufactures, imports, distributes, or retails collapsible or portable pet tent products in the U.S. market, this three-patent portfolio warrants a freedom-to-operate assessment. The utility patent US11939786B1 covers structural aspects, while USD0971526S and USD0982583S address visual design — meaning even a functionally distinct product could face exposure if its appearance is substantially similar to the claimed ornamental designs.
PatSnap Eureka’s FTO Search Agent can map the claims of US11939786B1 and both design patents against your product specifications, identify design-around opportunities, and flag forward citations that may indicate additional related patents in the holder’s portfolio. With enforcement activity already on the public record, an FTO analysis for pet shelter and pet tent product lines should be prioritised before the next product cycle or import consignment.
Run a freedom-to-operate analysis on US11939786B1 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 accessories, design patents, and Chinese manufacturer defendants in U.S. federal district courts.
What this case signals for the pet product IP landscape
A one-day filing and withdrawal over pet tent patents may be brief, but the strategic signals for IP holders and product sellers are meaningful.
Without-prejudice dismissals preserve full enforcement optionality
Huang’s Rule 41(a)(1)(B) dismissal keeps all claims alive. Competitors and importers of pet tent products covered by US11939786B1, USD0971526S, or USD0982583S should not interpret this closure as resolution — the plaintiff can refile at any time within the applicable limitations period.
Design patents are a fast-acting tool against copycat pet products
Two of the three asserted patents are design patents covering ornamental appearance. Design patent infringement analysis is visual and can be quicker to establish than utility patent infringement, making them a commercially efficient mechanism for IP holders targeting look-alike product imports from overseas manufacturers.
Huang v Shenzhen — key questions answered
William Huang filed a patent infringement action against Shenzhen Zhaocheng Technology Co., Ltd. in the Northern District of Illinois on 17 September 2025, asserting utility patent US11939786B1 and two design patents over pet tent products. The case was voluntarily dismissed without prejudice the following day under Rule 41(a)(1)(B), before the defendant served any answer.
A dismissal without prejudice means William Huang retains the right to refile infringement claims based on US11939786B1 and the two design patents against the same or other defendants in a future action. The dismissal does not constitute a finding on the merits and does not prevent the plaintiff from resuming enforcement activity within the applicable statute of limitations.
Huang asserted three patents: US11939786B1 (a utility patent covering pet tent structure and function), USD0971526S, and USD0982583S (both design patents covering the ornamental appearance of pet tent products). The combination of utility and design patents provides layered protection over both functional and visual aspects of the product.
Yes. Because the dismissal was without prejudice, Huang is not barred from refiling the same claims against Shenzhen Zhaocheng Technology. The defendant obtained no merits ruling, admission, or covenant in its favour from this proceeding. However, if refiled and subsequently dismissed again voluntarily, a second dismissal could operate as a dismissal with prejudice under the ‘two dismissal rule’.
A filing followed by an immediate voluntary dismissal without prejudice can serve several strategic purposes: it may have been filed to prompt settlement or licensing negotiations, to establish a priority filing date before a limitation deadline, or to test the defendant’s response. The public record in this case does not disclose the underlying rationale, but the pattern is consistent with pre-litigation enforcement strategies commonly used in cross-border IP disputes.
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