US2675674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lee he
Assignee: —
•
Filing: —
•
Granted: 1954-04-20
•
Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
F; F02; F02K; F02K3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2274254A
Cited
US1411991A
Cited
US1549745A
Cited
FR724287A
Cited
US2016234A
Cited
FR42494E
Cited
US2013372A
Cited
US2117891A
Cited
US2106684A
Cited
US2229681A
Cited
US2245562A
Cited
US2196279A
Cited
US2313002A
Cited
US2258094A
Cited
US2264262A
Cited
US2456211A
Cited
US2336232A
Cited
US2384282A
Cited
US2452088A
Cited
US2404428A
Cited
US2410474A
Cited
US2405888A
Cited
US2622393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |