US2713852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opposed piston internal combustion engine frame structure
Assignee: Individual
•
Filing: 1950-12-29
•
Granted: 1955-07-26
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:02
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0002; F02F7/0009; Y; Y10; Y10S; Y10S123/00; Y10S123/01; Y10S123/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1979075A
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US1980924A
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US2170099A
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US2290202A
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US2428886A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-25 | 1959-01-24 | 1959-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-25 | 1963-01-24 | 1963-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-25 | 1967-01-24 | 1967-07-26 | $7700.00 | Window Closed / Lapsed |