US2661753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined seat and safety disk element for valves
Assignee: Specialties Development Corp
•
Filing: 1946-05-07
•
Granted: 1953-12-08
•
Expires: 1966-05-07
Abstract
No abstract record available.
Inventors
- 👤 John H Stroop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:10
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K21/00; F16K21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US504812A
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US1740420A
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US701607A
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US1041945A
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US1093254A
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US1357667A
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US1669700A
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US1740421A
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US1740422A
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US2106176A
Cited
US2197609A
Cited
US2414113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |