Patent US2020224A successfully refreshed from Google Patents.
US2020224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Eclipse Aviation Corp
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Filing: 1930-09-30
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Granted: 1935-11-05
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Expires: 1950-09-30
Abstract
No abstract record available.
Inventors
- 👤 Waseige Charles Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/32; F02B33/34; F02B33/40; F02B33/44; F02B33/446; F02B39/00; F02B39/02; F02B39/04; F02B39/12; F02M; F02M2700/00; F02M2700/33; F02M2700/331; F02M2700/335; Y; Y10; Y10S; Y10S60/00; Y10S60/913
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) | 1938-11-04 | 1939-05-06 | 1939-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-04 | 1943-05-06 | 1943-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-04 | 1947-05-06 | 1947-11-05 | $7700.00 | Window Closed / Lapsed |