US3001546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Individual
•
Filing: 1958-10-06
•
Granted: 1961-09-26
•
Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 Clifford A Salisbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:14
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; 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)
US141309A
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US287007A
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US569323A
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US666245A
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US1026472A
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US1111319A
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FR1035787A
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US2679262A
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US2870576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |