Patent US2876847A successfully refreshed from Google Patents.
US2876847A
Expired / Lapsed
US
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Air driven propeller and governor therefor
Assignee: Motors Liquidation Co
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Filing: 1954-04-01
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Granted: 1959-03-10
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Expires: 1974-04-01
Abstract
No abstract record available.
Inventors
- 👤 Alan B Blackburn
- 👤 James R Kessler
- 👤 Robert K Skinner
- 👤 John H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:37
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/022; F03D7/0224; F05; F05B; F05B2220/00; F05B2220/30; F05B2220/31; F05B2260/00; F05B2260/70; F05B2260/74; F05B2260/75; F05B2260/77; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1287116A
Cited
US1401651A
Cited
US1443664A
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US1636434A
Cited
US1768784A
Cited
US2215413A
Cited
US2550229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |