US2638307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve
Assignee: Individual
•
Filing: 1947-11-22
•
Granted: 1953-05-12
•
Expires: 1967-11-22
Abstract
No abstract record available.
Inventors
- 👤 Fortune Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:12
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K41/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US349758A
Cited
CH3642A
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US754186A
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FR19787E
Cited
US1385681A
Cited
US1612567A
Cited
US1647823A
Cited
US1891133A
Cited
US2000542A
Cited
US1983106A
Cited
US1990635A
Cited
US2027859A
Cited
US2377227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |