US3664633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote controlled oil and liquid drain valve
Assignee: EZ SERV Inc
•
Filing: 1970-10-02
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Granted: 1972-05-23
•
Expires: 1990-10-02
Abstract
Abstract OIL IS READILY DRAINED FROM AN AUTOMOTIVE VEHICLE ENGINE CRANK CASE OR OIL PAN BY A REMOTELY CONTROLLED ESPECIALLY ADAPTED VALVE ARRANGED TO MAINTAIN CLOSURE TENSION ON THE VALVE IN CLOSED POSITION.
Inventors
- 👤 Myer J Schaffner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:34
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/46; F16K31/465; F01; F01M; F01M11/00; F01M11/04; F01M11/0408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |