Patent US2425156A successfully refreshed from Google Patents.
US2425156A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1943-03-12
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Granted: 1947-08-05
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Expires: 1963-03-12
Abstract
No abstract record available.
Inventors
- 👤 Lloyd O Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:23
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195441A
Cited
US1323685A
Cited
US1398194A
Cited
US1781434A
Cited
US1897191A
Cited
GB348332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |