US2639765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighter valve unit
Assignee: —
•
Filing: —
•
Granted: 1953-05-26
•
Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:48
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23D; F23D14/00; F23D14/28; F23D14/38; F23D14/46; F23D14/465; F23N5/107; F23Q; F23Q2/00; F23Q2/16; F23Q2/164; F24; F24C; F24C3/00; F24C3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2487963A
Cited
US2490729A
Cited
US2557927A
Cited
US1995846A
Cited
US2443892A
Cited
US2510264A
Cited
US2513578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |