Patent US3564566A successfully refreshed from Google Patents.
US3564566A
Expired / Lapsed
US
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Process and fabrication of tapered titanium and/or other alloy extrusions
Assignee: Boeing Co
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Filing: 1968-11-26
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Granted: 1971-02-16
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Expires: 1988-11-26
Abstract
Abstract A PERFORMED LONGITUDINALLY TAPERD STRUCTURAL SHAPE SUCH AS A T SECTION, A Z SECTION, A ROUND BAR, ETC., IS EN- CASED IN THE CORE OF A DISSIMILAR MATERIAL. THE ENCASEMENT IS EXTRUDED, AFTER WHICH THE ENCASING MATERIAL IS REMOVED TO LEAVE A TAPERED T OR Z, ETC. SHAPE DEPENDENT UPON THE SHAPE OF THE PREFORM.
Inventors
- 👤 George H Heitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:54
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/01; B21C23/007; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |