US2767461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making propeller or rotor blade
Assignee: Lockheed Martin Corp
•
Filing: 1951-03-27
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Granted: 1956-10-23
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Jack W Lebold
- 👤 George C Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:41
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; B; B21; B21D; B21D53/00; B21D53/78; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B27/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332
Claims Analysis
Total Claims: 0
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US2648388A
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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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |