US3176775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structures of aerofoil shape
Assignee: Individual
•
Filing: 1963-05-28
•
Granted: 1965-04-06
•
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 13:42
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.
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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 |