Patent US2652033A successfully refreshed from Google Patents.
US2652033A
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Pressure fluid actuated valve operating mechanism
Assignee: Shafer Valve Co
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Filing: 1947-08-25
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Granted: 1953-09-15
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Expires: 1967-08-25
Abstract
No abstract record available.
Inventors
- 👤 Homer J Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:05
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE382574C
Cited
US354014A
Cited
DE248809C
Cited
US772842A
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US926400A
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US1051768A
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US1187861A
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US1566814A
Cited
CH84804A
Cited
DE396858C
Cited
US1765059A
Cited
US2361130A
Cited
US2402265A
Cited
US2533833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |