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US2799353A
Expired / Lapsed
US
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Jet driven helicopter rotor system
Assignee: Individual
•
Filing: 1953-05-18
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Granted: 1957-07-16
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Edward F Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1545214A
Cited
US1666523A
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US914969A
Cited
US1344661A
Cited
US1420619A
Cited
US1932702A
Cited
US2041787A
Cited
US2601258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |