US2767730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible seat valve
Assignee: Crane Co
•
Filing: 1953-04-01
•
Granted: 1956-10-23
•
Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Hubert C Laird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42; F16K1/422; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US291066A
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US424715A
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US663231A
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US1985382A
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US2059370A
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US2330610A
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US2628571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |