US1979462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion controlling device
Assignee: Individual
•
Filing: 1931-05-27
•
Granted: 1934-11-06
•
Expires: 1951-05-27
Abstract
No abstract record available.
Inventors
- 👤 Gardner Charles Francls
- 👤 Brass Emil Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:45
CPC Classifications
F; F23; F23L; F23L5/00; F23L5/02; F23L9/00
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) | 1937-11-05 | 1938-05-07 | 1938-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-05 | 1942-05-07 | 1942-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-05 | 1946-05-07 | 1946-11-06 | $7700.00 | Window Closed / Lapsed |