US2775426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade structure
Assignee: Westinghouse Electric Corp
•
Filing: 1951-12-20
•
Granted: 1956-12-25
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Lawrence D Barrett
- 👤 John R Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:48
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1261141A
Cited
US1329735A
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US1385802A
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US1843886A
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FR864186A
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GB574770A
Cited
US2431660A
Cited
US2520373A
Cited
US2473665A
Cited
US2498348A
Cited
US2665881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |