Law Office of Michael Chen
Patent reexamination counsel·5 ex parte reexams
Law Office of Michael Chen has served as patent-owner counsel in 5 USPTO ex parte reexaminations, with 3 currently open. The firm most often represents Zhijian Liu, Shaomin Hu, and Yusheng Liang. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.
Filings by year
Top patent owners represented
Outcome track record
How this firm's reexams resolve once a certificate issues: all claims confirmed, amended, mixed, or canceled.
- Certificate outcome split across every bucket
- Share of proceedings where claims survived
Practice metrics
Certificate rate, average pendency, and the open/closed split across the firm's full reexam docket.
- Certificate rate of closed proceedings
- Average pendency in months
Examiners & adversaries
Which examiners most often decide this firm's reexams, and which requesters most often challenge its patents.
- Most frequent examiners
- Top opposing requesters
Recent reexaminations (5)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,603 | Oct 15, 2025 | D1,065,856 | Dining Chair | Zhijian Liu | Open |
| 90/015,365 | Oct 8, 2025 | D1,075,614 | Running Board | Shaomin Hu | Open |
| 90/015,495 | Sep 12, 2025 | 12,256,818 | Wallet with Accommodating Pocket for Anti-Lost Tag | Yusheng Liang | Open |
| 90/019,813 | Jan 14, 2025 | D1,044,966 | Handheld toy | — | Closed |
| 90/015,016 | Apr 27, 2022 | D930,404 | FILE CABINET | — | Closed |
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