Cantor Colburn, LLP
Patent reexamination counsel·7 ex parte reexams
Cantor Colburn, LLP has served as patent-owner counsel in 7 USPTO ex parte reexaminations, with 3 currently open. The firm most often represents CPC Patent Technologies, Pty Ltd., Kaifi LLC, and UPL Ltd.. 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
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 (7)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/016,531 | Aug 17, 2026 | 8,930,196 | SYSTEM FOR DETECTING SPEECH INTERVAL AND RECOGNIZING CONTINUOUS SPEECH IN A NOISY ENVIRONMENT THROUGH REAL-TIME RECOGNITION OF CALL COMMANDS | Kaifi LLC | Open |
| 90/019,830 | Jan 23, 2025 | 11,555,046 | CRYSTALLINE FORM OF L-GLUFOSINATE AMMONIUM SALT AND PROCESS FOR PRODUCTION THEREOF | UPL Ltd. | Closed |
| 90/019,618 | Aug 9, 2024 | 9,269,208 | REMOTE ENTRY SYSTEM | CPC Patent Technologies, Pty Ltd. | Open |
| 90/019,617 | Aug 9, 2024 | 9,665,705 | REMOTE ENTRY SYSTEM | CPC Patent Technologies, Pty Ltd. | Open |
| 90/013,501 | May 4, 2015 | 7,051,450 | PORTABLE COORDINATE MEASUREMENT MACHINE | Faro Technologies Inc. | Closed |
| 90/013,267 | Jun 24, 2014 | 7,194,281 | METHOD AND APPARATUS FOR SYNCHRONIZATION CONTROL OF FORWARD LINK TRANSMITTING POWER DURING SOFT HANDOFF IN WIRELESS COMMUNICATION SYSTEMS | ZTE Corporation | Closed |
| 90/012,418 | Sep 12, 2012 | 7,415,812 | APPARATUS AND METHOD FOR PACKING SMOKING ARTICLES | British American Tobacco (Investments) Limited | Closed |
Other reexam law firms
- Knobbe, Martens, Olson & Bear, LLP115 reexams · 25 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 Cantor Colburn, LLP
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.