US2979161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant level oilers
Assignee: Individual
•
Filing: 1958-07-02
•
Granted: 1961-04-11
•
Expires: 1978-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frank J Lyden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
F; F16; F16N; F16N19/00; F16N19/006; F16N7/00; F16N7/14; F16N7/16; F16N7/20; F16N7/22; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7498
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1077727A
Cited
US1424974A
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US1483545A
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US1606519A
Cited
US1725987A
Cited
US2274473A
Cited
US2579039A
Cited
US2727709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |