US2956575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1957-02-27
•
Granted: 1960-10-18
•
Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 William L Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:47
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2608353A
Cited
US1632144A
Cited
US1982582A
Cited
US2131094A
Cited
US2524667A
Cited
US2607225A
Cited
US2637333A
Cited
US2724972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |