US3334652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve permitting passage of physical object therethrough
Assignee: TESORO PUMP & VALVE Co A CORP OF
•
Filing: 1964-01-06
•
Granted: 1967-08-08
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Wheatley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:21
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/034; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7901; Y10T137/7903; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172371A
Cited
US2930400A
Cited
US2913001A
Cited
US2969492A
Cited
US3075547A
Cited
US3143136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |