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Patent US2660072A successfully refreshed from Google Patents.
US2660072A
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Dual control mechanism for valves and the like
Assignee: CONTINENTAL FOUNDRY AND MACHIN
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Filing: 1950-09-19
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Granted: 1953-11-24
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Expires: 1970-09-19
Abstract
No abstract record available.
Inventors
- 👤 Vincent V Veenschoten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:10
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1966209A
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US2005891A
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US2324211A
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US2391418A
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US2318010A
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US2390882A
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US2420552A
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US2414032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |