US2491375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller mechanism and control
Assignee: Marquette Metal Products Co
•
Filing: 1944-03-28
•
Granted: 1949-12-13
•
Expires: 1964-03-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85954; Y10T137/87169; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22034E
Cited
US1372944A
Cited
US1810159A
Cited
CH147228A
Cited
US1894048A
Cited
US2023785A
Cited
US2002712A
Cited
FR782129A
Cited
DE635992C
Cited
FR796083A
Cited
DE703319C
Cited
US2149388A
Cited
US2257126A
Cited
US2166653A
Cited
FR826196A
Cited
US2229058A
Cited
US2248590A
Cited
US2290196A
Cited
US2313301A
Cited
US2307101A
Cited
US2307102A
Cited
US2343382A
Cited
US2320195A
Cited
US2346979A
Cited
US2412923A
Cited
US2347104A
Cited
GB559361A
Cited
US2355039A
Cited
US2353773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |