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US2875778A
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US
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Automatic valve
Assignee: Individual
•
Filing: 1956-12-18
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Granted: 1959-03-03
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Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 Vincent W Hair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:38
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/528; F16K31/5288; F16K21/00; F16K21/04; F16K21/18; F16K21/20; F16K31/12; F16K31/36; F16K31/38; F16K31/385; F16K31/56; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2661136A
Cited
US2762389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |