US1812860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1929-06-17
•
Granted: 1931-07-07
•
Expires: 1949-06-17
Abstract
No abstract record available.
Inventors
- 👤 Walter M Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/19; Y10S55/28
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) | 1934-07-06 | 1935-01-05 | 1935-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-06 | 1939-01-05 | 1939-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-06 | 1943-01-05 | 1943-07-07 | $7700.00 | Window Closed / Lapsed |