US2547276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner with gas preheating chamber and flame nozzles
Assignee: Individual
•
Filing: 1947-02-28
•
Granted: 1951-04-03
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Marsh
- 👤 Glenn G Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:57
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/66; F23D14/48; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US619623A
Cited
US1316668A
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US1423750A
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US1875394A
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US1371490A
Cited
US1758790A
Cited
US1677787A
Cited
US1763295A
Cited
US2373326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |