US2531316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple fuel burner
Assignee: Individual
•
Filing: 1946-08-09
•
Granted: 1950-11-21
•
Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 John S Zink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:07
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/20; F23D14/22; F23D14/02; F23D17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678086A
Cited
US1844315A
Cited
US1922857A
Cited
US1943083A
Cited
US2211584A
Cited
US2204719A
Cited
US2344936A
Cited
US2487959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |