US2168859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-fuel-burning apparatus
Assignee: Individual
•
Filing: 1937-03-08
•
Granted: 1939-08-08
•
Expires: 1957-03-08
Abstract
No abstract record available.
Inventors
- 👤 Bergey William Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:37
CPC Classifications
F; F23; F23D; F23D5/00; F23D5/02; F23N; F23N5/00; F23N5/02; F23N5/025
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) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |