Patent US3961440A successfully refreshed from Google Patents.
Patent US2114655A successfully refreshed from Google Patents.
US2114655A
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US
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Method and apparatus for operating internal combustion engines
Assignee: Individual
•
Filing: 1935-02-26
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Granted: 1938-04-19
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Expires: 1955-02-26
Abstract
No abstract record available.
Inventors
- 👤 William E Leibing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:36
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/02; F02M3/04; F02M3/043; F01; F01L; F01L13/00; F02D; F02D17/00; F02D17/02; F01L2760/00; F01L2760/003
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) | 1941-04-18 | 1941-10-18 | 1942-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-18 | 1945-10-18 | 1946-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-18 | 1949-10-18 | 1950-04-19 | $7700.00 | Window Closed / Lapsed |