US2823740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner system
Assignee: Selas Corp of America
•
Filing: 1954-12-16
•
Granted: 1958-02-18
•
Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles W Morck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D14/00; F23D14/12; F23D14/125; F23C2700/00; F23C2700/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2703
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1731306A
Cited
US1781236A
Cited
US2251019A
Cited
US2458543A
Cited
US2594094A
Cited
US2561793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |