US2018892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for eliminating knocking in internal combustion engines
Assignee: FUEL DEV CORP
•
Filing: 1932-12-02
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Granted: 1935-10-29
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Expires: 1952-12-02
Abstract
No abstract record available.
Inventors
- 👤 Leo B Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:24
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F02B77/085; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213; Y10T74/2022; Y10T74/20226
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) | 1938-10-28 | 1939-04-29 | 1939-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-10-28 | 1943-04-29 | 1943-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-10-28 | 1947-04-29 | 1947-10-29 | $7700.00 | Window Closed / Lapsed |