US2485534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making spar roots for helicopter blades and the like
Assignee: Goodyear Aircraft Corp
•
Filing: 1946-12-27
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Granted: 1949-10-18
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Expires: 1966-12-27
Abstract
No abstract record available.
Inventors
- 👤 Mayne Robert
- 👤 Jr Harry L Hosterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/78; 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)
US1891904A
Cited
US1890077A
Cited
FR705691A
Cited
US2037636A
Cited
US1982874A
Cited
US2200506A
Cited
US2272439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |