US3551996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aluminum-steel composite
Assignee: INTERNATIONAL LIGHT METALS Corp
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Filing: 1969-08-14
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Granted: 1971-01-05
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Expires: 1989-08-14
Abstract
Abstract A HIGH STRENGTH ALUMINUM-STEEL COMPOSITE IS FORMED BY COMPRESSING AT ELEVATED TEMPERATURES AN ASSEMBLED STACK OF AT LEAST TWO SHEETS OF ALUMINUM HAVING STEEL WIRES SANDWICHED THEREBETWEEN, WITH ONE OF THE OPPOSING SURFACES OF THE SHEETS HAVING A GROOVE FORMED THEREIN, THE FORCE UNDER WHICH THE ASSEMBLY IS COMPRESSED BEING SUFFICIENT TO FILL IN THE GROOVE AND THEREBY EXPOSE FRESH METAL SURFACE WHICH FORMS A SUBSTANTIALLY CONTINUOUS METALLURGICAL BOND BETWEEN THE OPPOSING SHEET SURFACES.
Inventors
- 👤 Edwin V Sumner
- 👤 Donald Q Cole
- 👤 Le Roy W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:05
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/20; B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; B22; B22F; B22F2998/00; B22F2999/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |