US3012308A
Expired / Lapsed
US
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Method of making blade structures
Assignee: Joy Manufacturing Co
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Filing: 1957-08-12
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Granted: 1961-12-12
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 William A Zech
- 👤 Le Roy M Krouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; B; B21; B21D; B21D53/00; B21D53/78; B23; B23P; B23P15/00; B23P15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49789; Y10T29/49826; Y10T29/49947; Y10T29/49954; Y10T29/49956; Y10T29/49959; Y10T29/49966; Y10T29/49968
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |