US2734790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forftgn patpnts
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/007; F41; F41B; F41B5/00; F41B5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1106877A
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US1220256A
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US1188146A
Cited
US1561351A
Cited
CH133029A
Cited
US1836780A
Cited
US1915173A
Cited
US2240149A
Cited
US2323436A
Cited
US2440527A
Cited
US2484631A
Cited
US2628738A
Cited
US2621799A
Cited
US2651137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |