US3452778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Mission Manufacturing Co
•
Filing: 1966-02-18
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Granted: 1969-07-01
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Willis Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:54
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/035; F16K15/036; F16K15/038; F16K15/033; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1238878A
Cited
US1570907A
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US2864397A
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US2877792A
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US2976882A
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US3026901A
Cited
US2969492A
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US3122156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |