William C. Pannell
Ex parte reexamination requester·2 ex parte reexams
William C. Pannell has requested 2 USPTO ex parte reexaminations, with 1 currently open. It most often challenges patents owned by Surefire LLC. 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 challenged
Outcome track record
How this requester's challenges resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Share of challenges that canceled claims
Challenge metrics
Cancellation rate, average pendency, and the open/closed split across every reexam this requester has filed.
- Outcome rate of closed challenges
- Average pendency in months
Examiners & defense counsel
Which examiners decide this requester's challenges, and which firms defend the targeted patents.
- Most frequent examiners
- Top opposing counsel
Recent reexaminations (2)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,680 | Nov 12, 2025 | 7,676,976 | SYSTEMS FOR ATTACHING A NOISE SUPPRESSOR TO A FIREARM | Surefire LLC | Open |
| 90/015,543 | Sep 25, 2025 | 8,459,406 | MOUNTING APPARATUS FOR FIREARM SOUND SUPPRESSOR | Surefire LLC | Closed |
See the full reexam picture for William C. Pannell
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