Patent US2159649A successfully refreshed from Google Patents.
Patent US2689628A successfully refreshed from Google Patents.
US2689628A
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Automatic oil level control device
Assignee: Individual
•
Filing: 1950-07-26
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Granted: 1954-09-21
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Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 Charles F Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:47
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; F; F16; F16N; F16N19/00; F16N19/003; F16N19/006; G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3109; Y10T137/7287; Y10T137/7498
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |