Patterson + Sheridan, L.L.P.
Patent reexamination counsel·6 ex parte reexams
Patterson + Sheridan, L.L.P. has served as patent-owner counsel in 6 USPTO ex parte reexaminations, with 3 currently open. The firm most often represents Amp Plus Inc., Sigray Inc., and Asset Guard Products Inc.. 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 (6)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,889 | Jan 15, 2026 | 12,181,423 | SECONDARY IMAGE REMOVAL USING HIGH RESOLUTION X-RAY TRANSMISSION SOURCES | Sigray Inc. | Open |
| 90/015,563 | Oct 1, 2025 | 11,725,805 | LIGHTING JUNCTION BOX WITH ASSEMBLY FOR HANGING | Amp Plus Inc. | Open |
| 90/015,562 | Oct 1, 2025 | 11,460,157 | Lighting Assembly Junction Box for Adjustable Ceiling Installation | Amp Plus Inc. | Open |
| 90/015,561 | Oct 1, 2025 | 11,159,004 | ADJUSTABLE RECESSED BOX | Amp Plus Inc. | Closed |
| 90/019,951 | May 9, 2025 | 11,092,326 | INTEGRATED LIGHTING MODULE | Amp Plus Inc. | Closed |
| 90/014,303 | May 10, 2019 | 9,410,302 | TANK BASE | Asset Guard Products Inc. | Closed |
Other reexam law firms
- Knobbe, Martens, Olson & Bear, LLP115 reexams · 24 pending
- Sterne, Kessler, Goldstein & Fox P.L.L.C.105 reexams · 34 pending
- Fish & Richardson, P.C.76 reexams · 17 pending
- Volpe Koenig54 reexams · 29 pending
- Lowenstein & Weatherwax, LLP51 reexams · 24 pending
- Nixon & Vanderhye, P.C.48 reexams · 8 pending
See the full reexam picture for Patterson + Sheridan, L.L.P.
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.