Patent US2699764A successfully refreshed from Google Patents.
US2699764A
Expired / Lapsed
US
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Air cooled internal-combustion engine
Assignee: Individual
•
Filing: 1952-02-14
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Granted: 1955-01-18
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Expires: 1972-02-14
Abstract
No abstract record available.
Inventors
- 👤 Elmer C Kiekhaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:53
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/02; F01P5/06; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23146E
Cited
DE578131C
Cited
DE667397C
Cited
GB505078A
Cited
US2236706A
Cited
US2245989A
Cited
US2233825A
Cited
US2326335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |