Patent US2807870A successfully refreshed from Google Patents.
US2807870A
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Method of making a propeller blade
Assignee: Motors Liquidation Co
•
Filing: 1952-02-05
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Granted: 1957-10-01
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Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Harness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:49
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/08; B21C23/085; B21K; B21K3/00; B21K3/04; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49334
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR958272A
Cited
DE401476C
Cited
US2015332A
Cited
US1982874A
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US2183158A
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US2190494A
Cited
DE710289C
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US2394445A
Cited
US2394446A
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US2293801A
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US2643725A
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US2511858A
Cited
US2457889A
Cited
US2463101A
Cited
US2647586A
Cited
US2535917A
Cited
US2487860A
Cited
US2591757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |