US3105557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor blade
Assignee: Individual
•
Filing: 1960-08-04
•
Granted: 1963-10-01
•
Expires: 1980-08-04
Abstract
No abstract record available.
Inventors
- 👤 Wigal Voorhis Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:48
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
FOR USE IN AN AIRFOIL, A REINFORCING SPAR COMPRISING A SERIES OF TUBULAR MEMBERS TANGENTIALLY ATTACHED TOGETHER, AND A FILLER OF SOLID PLASTIC MATERIAL EXTENDING FROM ONE END OF SAID SPAR AND TERMINIATING AT DISTANCES WHICH DIFFER IN AT LEAST TWO OF SAID TUBES.
Claim 2
Dependent Claim
44 words
FOR USE IN AN AIRFOIL, A REINFORCING SPAR COMPRISING A SERIES OF TUBULAR MEMBERS TANGENTIALLY ATTACHED TOGETHER, AND A FILLER OF SOLID PLASTIC MATERIAL EXTENDING FROM ONE END OF SAID SPAR AND TERMINIATING AT DISTANCES WHICH DIFFER IN AT LEAST TWO OF SAID TUBES.
References Cited (Backward Citations)
DE306469C
Cited
US1769801A
Cited
DE694020C
Cited
DE702039C
Cited
US2400649A
Cited
US2388464A
Cited
US2613893A
Cited
US2659444A
Cited
GB670364A
Cited
US2653139A
Cited
US2648388A
Cited
US2807870A
Cited
US2954828A
Cited
US2915129A
Cited
US2827967A
Cited
DE1036064B
Cited
US3028292A
Cited
US3000446A
Cited
DE1080859B
Cited
US2981337A
Cited
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 |