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Patent US3249327A successfully refreshed from Google Patents.
US3249327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfoil structure
Assignee: Individual
•
Filing: 1963-12-02
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Granted: 1966-05-03
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Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Russell W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:04
CPC Classifications
B; B64; B64C; B64C3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
AN AIRFOIL STRUCTURE WITH POSITIVE CAMBER COMPRISING, IN COMBINATON, AN AIRFOIL SHAPOED BASE MEMBER, A COMPRESSION MEMBER ATTACHED AT ITS BASE TO THE BASE MEMBER, AND TENSIONED MEMBERS RUNNING FROM ANCHOR POINTS AT THE APEX OF THE COMPRESSION MEMBER TO ANCHOR POINTS ON THE BASE MEMBER, SAID ANCHOR POINTS ARRANGED IN SUCH MANNER THAT AN AERODYNAMICALLY USEFUL CAMBERED AIRFOIL CONFIGURATION IS CIRCUMSCRIBED AND IMPARTED TO SAID TENSIONED MEMBERS AND RETAINED IN ANY CROSS SECTION.
References Cited (Backward Citations)
US2616509A
Cited
US2986363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |