Patent US1553156A successfully refreshed from Google Patents.
US1553156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: Individual
•
Filing: 1920-03-01
•
Granted: 1925-09-08
•
Expires: 1940-03-01
Abstract
No abstract record available.
Inventors
- 👤 Charles W Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:02
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/04; F02; F02M; F02M31/00; F02M31/02; F02M31/14; F02M31/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1928-09-07 | 1929-03-09 | 1929-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-07 | 1933-03-09 | 1933-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-07 | 1937-03-09 | 1937-09-08 | $7700.00 | Window Closed / Lapsed |