US2798564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical controllable pitch propeller
Assignee: Individual
•
Filing: 1952-06-30
•
Granted: 1957-07-09
•
Expires: 1972-06-30
Abstract
No abstract record available.
Inventors
- 👤 John H Strandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:33
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B63H2003/088
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1628603A
Cited
US1510436A
Cited
CH112466A
Cited
CH117358A
Cited
US1901772A
Cited
US2072488A
Cited
US2088520A
Cited
GB493416A
Cited
US2244770A
Cited
US2280190A
Cited
CH217669A
Cited
CH257958A
Cited
US2456361A
Cited
US2517714A
Cited
US2470517A
Cited
US2513546A
Cited
US2612229A
Cited
US2518925A
Cited
GB661170A
Cited
US2660461A
Cited
US2580353A
Cited
US2661807A
Cited
US2693243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |