US3117630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotors
Assignee: BARISH ASS Inc
•
Filing: 1960-03-01
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Granted: 1964-01-14
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Expires: 1980-03-01
Abstract
No abstract record available.
Inventors
- 👤 David T Barish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B64C27/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A ROTOR SYSTEM COMPRISING A BLADE COMPRISING A FLEXIBLE DIAPHRAGMATIC BLADE ELEMENT HAVING CONCAVE LATERAL EDGES LEADING FROM A RELATIVELY WIDE INBOARD ROOT END TO A RELATIVELY NARROW OUTBOARD TIP END, FLEXIBLE TENSION MEMBERS SECURED TO THE BLADE ELEMENT ADJACENT TO AND CONFORMING TO THE RESPECTIVE CONCAVE EDGES, SAID ELEMENT HAVING SUBSTANTIALLY NO RESIDUAL BENDING RESISTANCE EITHER SPANWISELY OR CHORDWISELY BETWEEN SAID TENSION MEMBERS,
Claim 2
Dependent Claim
64 words
A ROTOR SYSTEM COMPRISING A BLADE COMPRISING A FLEXIBLE DIAPHRAGMATIC BLADE ELEMENT HAVING CONCAVE LATERAL EDGES LEADING FROM A RELATIVELY WIDE INBOARD ROOT END TO A RELATIVELY NARROW OUTBOARD TIP END, FLEXIBLE TENSION MEMBERS SECURED TO THE BLADE ELEMENT ADJACENT TO AND CONFORMING TO THE RESPECTIVE CONCAVE EDGES, SAID ELEMENT HAVING SUBSTANTIALLY NO RESIDUAL BENDING RESISTANCE EITHER SPANWISELY OR CHORDWISELY BETWEEN SAID TENSION MEMBERS,
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |