Patent JPS5722397A successfully refreshed from Google Patents.
Patent US1698468A successfully refreshed from Google Patents.
US1698468A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1921-08-13
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Granted: 1929-01-08
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Expires: 1941-08-13
Abstract
No abstract record available.
Inventors
- 👤 Erl V Beals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:52
CPC Classifications
F; F02; F02B; F02B47/00; F02B47/02; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1932-01-08 | 1932-07-09 | 1933-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-08 | 1936-07-09 | 1937-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-08 | 1940-07-09 | 1941-01-08 | $7700.00 | Window Closed / Lapsed |