US2649777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve device for gas burners
Assignee: —
•
Filing: —
•
Granted: 1953-08-25
•
Expires: 1970-08-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:19
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/005; F23N2235/00; F23N2235/12; F23N2235/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227901A
Cited
US2199975A
Cited
US2299155A
Cited
US2353740A
Cited
US2533491A
Cited
US2575086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |