Patent US2638845A successfully refreshed from Google Patents.
US2638845A
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Method for making matrices for molding rubber printing blocks
Assignee: ST Regis Paper Co
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Filing: 1948-03-19
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Granted: 1953-05-19
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Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Rae C Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:53
CPC Classifications
B; B41; B41C; B41C3/00; B41C3/04; B29; B29K; B29K2021/00; Y; Y10; Y10S; Y10S425/00; Y10S425/811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2139054A
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US2330002A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |