Patent CH218546A successfully refreshed from Google Patents.
US1986237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: HERMANN I A DORNER
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Filing: 1931-11-13
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Granted: 1935-01-01
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Expires: 1951-11-13
Abstract
No abstract record available.
Inventors
- 👤 Adolf A Widmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:32
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0085; F02F7/0002; F02F7/0017; F02B; F02B3/00; F02B3/06; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222
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) | 1937-12-31 | 1938-07-02 | 1939-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-31 | 1942-07-02 | 1943-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-31 | 1946-07-02 | 1947-01-01 | $7700.00 | Window Closed / Lapsed |