Levenfeld Pearlstein, LLC
Patent reexamination counsel·6 ex parte reexams
Levenfeld Pearlstein, LLC has served as patent-owner counsel in 6 USPTO ex parte reexaminations. The firm most often represents Illinois Tool Works Inc. and Chemical Light 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 |
|---|---|---|---|---|---|
| 90/012,484 | Sep 10, 2012 | 7,611,011 | PEROXIDE PRESERVATION | Illinois Tool Works Inc. | Closed |
| 90/012,485 | Sep 10, 2012 | 6,795,998 | SWAB WITH PULL-TRUDED TIP | Illinois Tool Works Inc. | Closed |
| 90/012,477 | Sep 7, 2012 | 6,746,998 | NON-FLAMMABLE TERNARY CLEANING SOLVENT | Illinois Tool Works Inc. | Closed |
| 90/012,460 | Sep 4, 2012 | 6,663,040 | STRAPPER WITH IMPROVED WINDING AND CUTTING ASSEMBLY | Illinois Tool Works Inc. | Closed |
| 90/012,461 | Sep 4, 2012 | 6,463,848 | STRAPPER WITH IMPROVED WINDING AND CUTTING ASSEMBLY | Illinois Tool Works Inc. | Closed |
| 90/009,993 | Apr 16, 2012 | 6,042,487 | ILLUMINATED GOLF BALL | Chemical Light Inc. | Closed |
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