Patent US2437317A successfully refreshed from Google Patents.
US2437317A
Expired / Lapsed
US
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Spot milling tubular blank for propeller blades
Assignee: Avco Manufacturing Corp
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Filing: 1945-03-08
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Granted: 1948-03-09
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Expires: 1965-03-08
Abstract
No abstract record available.
Inventors
- 👤 Dwillard J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:57
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49334; Y10T408/00; Y10T408/21; Y10T408/55; Y10T408/561; Y10T408/5612; Y10T409/00; Y10T409/30; Y10T409/306664; Y10T409/30672; Y10T409/306776; Y10T409/306832
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1497530A
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US1670136A
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US1556855A
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US1657659A
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US1656123A
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US2046624A
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US2214811A
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US2373341A
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US2383165A
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US2400603A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |