US3457997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor mounting
Assignee: Bell Aerospace Corp
•
Filing: 1967-09-15
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Granted: 1969-07-29
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Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Neil J Mackenzie
- 👤 William D Neathery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:06
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/41; B64C27/43; B64C27/46; B64C27/473; B64C27/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2499314A
Cited
US3237698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |