Patent US3176775A successfully refreshed from Google Patents.
US3176775A
Expired / Lapsed
US
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Structures of aerofoil shape
Assignee: Individual
•
Filing: 1963-05-28
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Granted: 1965-04-06
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Expires: 1983-05-28
Abstract
No abstract record available.
Inventors
- 👤 Clemens Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:05
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A STRUCTURE OF AEROFOIL SHAPE, COMPRISING A LEADING PORTION AND A TRAILING PORTION, THE SAID LEADING PORTION BEING HOLLOW AND CONSISTING OF A METAL OUTER SKIN AND A MEMBER COMPOSED OF A MIXTURE OF PHENOL-FORMALDEHYDE RESIN AND ASBESTOS FIBRE IN INTIMATE CONTACT WITH AND ADHERING TO THE SAID METAL SKIN, WHILE THE TRAILING PORTION IS SECURED TO THE LEADING PORTION TO COMPLETE THE AEROFOIL STRUCTURE, THE AMOUNT OF PHENOL-FORMALDEHYDE RESIN IN THE SAID MIXTURE BEING WITHIN THE RANGE OF 30% TO 40% BY WEIGHT.
Claim 2
Dependent Claim
84 words
A STRUCTURE OF AEROFOIL SHAPE, COMPRISING A LEADING PORTION AND A TRAILING PORTION, THE SAID LEADING PORTION BEING HOLLOW AND CONSISTING OF A METAL OUTER SKIN AND A MEMBER COMPOSED OF A MIXTURE OF PHENOL-FORMALDEHYDE RESIN AND ASBESTOS FIBRE IN INTIMATE CONTACT WITH AND ADHERING TO THE SAID METAL SKIN, WHILE THE TRAILING PORTION IS SECURED TO THE LEADING PORTION TO COMPLETE THE AEROFOIL STRUCTURE, THE AMOUNT OF PHENOL-FORMALDEHYDE RESIN IN THE SAID MIXTURE BEING WITHIN THE RANGE OF 30% TO 40% BY WEIGHT.
References Cited (Backward Citations)
US2182812A
Cited
US2361438A
Cited
US2645435A
Cited
US2818223A
Cited
US2754915A
Cited
US2648388A
Cited
US2715598A
Cited
DE1108081B
Cited
US2895936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |