US2956584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: CHECK ALL VALVE Co
•
Filing: 1956-12-17
•
Granted: 1960-10-18
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Noel M Anderson
- 👤 Roy F Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/028; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US548834A
Cited
US625292A
Cited
US650650A
Cited
GB156011A
Cited
US1814549A
Cited
US1945872A
Cited
US1911284A
Cited
US2039952A
Cited
US1997116A
Cited
US2241758A
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 |