Patent US3155166A successfully refreshed from Google Patents.
US3155166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor blade including improved attachment of filled aft structure
Assignee: Parsons Corp
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Filing: 1962-09-17
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Granted: 1964-11-03
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Frank L Stulen
- 👤 James A Hinds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:15
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
ROTOR BLADE CONSTRUCTION COMPRISING FORWARD BLADE STRUCTURE INCLUDING A SPAR HAVING A WEB INCLUDING AN AFT FACE AND HAVING SPAR MARGINS EXTENDING ALONG THE AIRFOIL MOLD LINE AFT OF THE WEB AFT FACE, TOGETHER WITH AFT STRUCTURE INCLUDING UPPER AND LOWER STRUCTURAL SKINS HAVING FLANGES EXTENDING INWARD ALONG AND ADHERED TO THE AFT FACE OF THE SPAR WEB, AND FILLER MATERIAL BETWEEN SAID STRUCTURAL SKINS, A THROAT IN THE FILLER MATERIAL ADJACNT TO THE AFT FACE OF THE SPAR WEB, THE THROAT HAVING A STRUCTURAL SKIN LINER INCLUDING FLANGES EXTENDING INWARD ALONG THE AFT SIDES OF THE SAID FLANGES OF THE SKINS.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |