US3379375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition burner
Assignee: Babcock International Ltd
•
Filing: 1965-07-26
•
Granted: 1968-04-23
•
Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest S Walkling
- 👤 Edwin C Mckenzie
- 👤 John S Maskell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:52
CPC Classifications
F; F23; F23Q; F23Q9/00; F23D; F23D11/00; F23D11/10; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516871A
Cited
US2397986A
Cited
US2686562A
Cited
US2685919A
Cited
US2741301A
Cited
US2878889A
Cited
US2818110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |