US3105659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound helicopter
Assignee: RTX Corp
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Filing: 1962-03-30
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Granted: 1963-10-01
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Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 Richard G Stutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:56
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/26; B64C27/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
IN A COMPOUND AIRCRAFT HAVING A HELICOPTER MODE OF OPERATION AND AN AIRPLANE MODE OF OPERATION, (A) A FUSELAGE, (B) A ROTOR MOUNTED THEREON, (C) SAID ROTOR HAVING BLADES, (D) MEANS FOR ROTATING SAID ROTOR AT A FIRST PREDETERMINED R.P.M. DURING HELICOPTER MODE OF OPERATION, (E) AND AUTOMATIC MEANS FOR MAINTAINING SAID ROTOR AT A SECOND PREDETERMINED R.P.M. DURING AIRPLANE MODE OF OPERATION, (F) SAID AUTOMATIC MEANS INCLUDING MEANS FOR CHANGING THE PITCH OF SAID BLADES CYCLICALLY.
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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |