Patent US2374959A successfully refreshed from Google Patents.
US2374959A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1941-06-19
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Granted: 1945-05-01
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Expires: 1961-06-19
Abstract
No abstract record available.
Inventors
- 👤 Ruppe Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/02; F02B57/00; F02B57/08; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/1804; F02B2075/1808
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) | 1948-04-30 | 1948-10-30 | 1949-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-30 | 1952-10-30 | 1953-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-30 | 1956-10-30 | 1957-05-01 | $7700.00 | Window Closed / Lapsed |