US2693789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled internal-combustion engine
Assignee: Briggs and Stratton Corp
•
Filing: 1953-05-11
•
Granted: 1954-11-09
•
Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Leo J Lechtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0002; F02F7/0004; F01; F01P; F01P1/00; F01P1/02; F02B; F02B63/00; F02B63/02; F02B75/00; F02B75/16; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511823A
Cited
US1447245A
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NL32802C
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US1463958A
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US2157666A
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US2249319A
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US2256002A
Cited
US2305186A
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US2375718A
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US2424416A
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US2404833A
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US2590134A
Cited
US2569461A
Cited
US2559079A
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US2606541A
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US2630881A
Cited
US2583466A
Cited
US2669322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |