Patent US1498757A successfully refreshed from Google Patents.
US1498757A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1920-09-29
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Granted: 1924-06-24
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Expires: 1940-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robertson Edmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B19/00; F02B19/06; F02F; F02F1/00; F02F1/002; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2143
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) | 1927-06-24 | 1927-12-24 | 1928-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-06-24 | 1931-12-24 | 1932-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-06-24 | 1935-12-24 | 1936-06-24 | $7700.00 | Window Closed / Lapsed |