US2838104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel oil burner safety device
Assignee: Babcock and Wilcox Co
•
Filing: 1954-08-06
•
Granted: 1958-06-10
•
Expires: 1974-08-06
Abstract
No abstract record available.
Inventors
- 👤 Carl R Midtlyng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:37
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/24; F23N2239/00; F23N2239/06; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6089; Y10T137/6103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US799505A
Cited
US1070700A
Cited
GB387253A
Cited
US2241920A
Cited
GB599164A
Cited
US2558355A
Cited
FR945816A
Cited
US2749935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |