Greer Burns & Crain Ltd.
Patent reexamination counsel·2 ex parte reexams
Greer Burns & Crain Ltd. has served as patent-owner counsel in 2 USPTO ex parte reexaminations. The firm most often represents Vanworld Pharmaceutical (Rugao) Company Limited and Keystone Retaining Wall Systems 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 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 (2)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/013,599 | Oct 1, 2015 | 8,900,639 | PROCESS FOR OBTAINING A RABBIT SKIN COMPRISING BIOLOGICAL ACTIVE SUBSTANCES | Vanworld Pharmaceutical (Rugao) Company Limited | Closed |
| 90/012,493 | Sep 11, 2012 | 6,881,463 | IRREGULAR, ROTATIONAL TESSELLATION SURFACE COVERING UNITS AND SURFACE COVERING | Keystone Retaining Wall Systems LLC | Closed |
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