Patent US2669312A successfully refreshed from Google Patents.
US2669312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft propeller speed controller
Assignee: Motors Liquidation Co
•
Filing: 1949-05-24
•
Granted: 1954-02-16
•
Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 Albert P Dinsmore
- 👤 Robert C Treseder
- 👤 James W Light
- 👤 Howard M Geyer
- 👤 Joseph C Whitmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:08
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0615; G05D1/063; F; F02; F02D; F02D29/00; F02D2700/00; F02D2700/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1151522A
Cited
US1485865A
Cited
US2363670A
Cited
US2382847A
Cited
US2410659A
Cited
US2455315A
Cited
US2517703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |