Peixia Chen
Patent owner in reexamination·4 ex parte reexams
Peixia Chen's patents have been the subject of 4 USPTO ex parte reexaminations, with 4 currently open. Its patents are most often challenged by Underwood & Associates LLC, David F. Underwood, and Xlyan Zhang. 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 requesters
Outcome track record
How reexams of this owner's patents resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Claim-survival rate
Defense metrics
Claim-survival rate, average pendency, and the open/closed split across every reexam of this owner's patents.
- Survival rate of closed proceedings
- Average pendency in months
Challengers & examiners
Which requesters most often challenge this owner's patents, and which examiners decide them.
- Top requesters
- Most frequent examiners
Recent reexaminations (4)
| Control # | Filed | Patent | Title | Requester | Status |
|---|---|---|---|---|---|
| 90/015,701 | Nov 19, 2025 | 12,151,182 | MAGNETIC SUCTION BUILDING BLOCK | Underwood & Associates LLC | Open |
| 90/015,667 | Nov 8, 2025 | 11,766,622 | Magnetic suction building block | David F. Underwood | Open |
| 90/015,462 | Aug 21, 2025 | 12,151,182 | MAGNETIC SUCTION BUILDING BLOCK | Xlyan Zhang | Open |
| 90/019,669 | Sep 23, 2024 | D1,027,066 | MAGNETIC BUILDING BLOCK | — | Open |
See the full reexam picture for Peixia Chen
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.