US1727197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: Ambac International Corp
•
Filing: 1925-11-25
•
Granted: 1929-09-03
•
Expires: 1945-11-25
Abstract
No abstract record available.
Inventors
- 👤 Harry F Bryan
- 👤 Ensign Roy Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4321; Y; Y10; Y10S; Y10S261/00; Y10S261/37
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) | 1932-09-02 | 1933-03-04 | 1933-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-02 | 1937-03-04 | 1937-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-02 | 1941-03-04 | 1941-09-03 | $7700.00 | Window Closed / Lapsed |