US2423191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for variable pitch propeller adjusting devices
Assignee: Individual
•
Filing: 1943-08-03
•
Granted: 1947-07-01
•
Expires: 1963-08-03
Abstract
No abstract record available.
Inventors
- 👤 Kopp Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:38
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2205625A
Cited
DE703319C
Cited
US2154887A
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US2179492A
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US2244770A
Cited
GB517696A
Cited
GB541839A
Cited
US2343416A
Cited
CH217669A
Cited
US2353566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |