Patent US3492983A successfully refreshed from Google Patents.
US3492983A
Expired / Lapsed
US
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Low oil pressure shut-down valve
Assignee: Individual
•
Filing: 1968-06-13
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Granted: 1970-02-03
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Expires: 1988-06-13
Abstract
No abstract record available.
Inventors
- 👤 Willie Leon Vipperman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:27
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/18; F01M1/20; F01M1/22; F01M1/24; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1339798A
Cited
US1381765A
Cited
US1473303A
Cited
US1740259A
Cited
DE833143C
Cited
FR1140029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |