Patent US3629859A successfully refreshed from Google Patents.
Patent US2636513A successfully refreshed from Google Patents.
US2636513A
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US
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Valve unit
Assignee: Reed Roller Bit Co
•
Filing: 1947-11-07
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Granted: 1953-04-28
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Expires: 1967-11-07
Abstract
No abstract record available.
Inventors
- 👤 Paul E Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
F; F01; F01B; F01B17/00; F01B17/02; F16; F16K; F16K31/00; F16K31/44; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/86863; Y10T137/86871; Y10T137/87917; Y10T137/88022; Y10T137/8803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1026459A
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US1136717A
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US1181305A
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US1223022A
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US1485957A
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US2014997A
Cited
FR756737A
Cited
US2117584A
Cited
US2217876A
Cited
US2423957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |