Composite article comprising three dissimilar metals
Abstract
Abstract A METHOD FOR PRODUCING A COMPOSITE ARTICLE HAVING A FERROUS SUBSTRATE AND AT LEAST ONE NON-FERROUS METAL, FOR EXAMPLE, COPPER OR ALUMINUM, CLAD THERETO ON ONE SURFACE OR ON BOTH SURFACES. THE METHOD INCLUDES COLD ROLLING THE SUBSTRATE AND CLADDING TO EFFECT A REDUCTION OF ABOUT 5%, HEATING THE COMPOSITE THUS FORMED TO A TEMPERATURE IN THE RANGE OF A MINIMUM OF 600*F. AND A MAXIMUM WHICH IS ABOUT 100*F. BELOW THE TEMPERATURE AT WHICH THE CLAD METAL WILL MELT, AND ROLLING THE COMOSITE WITHIN THIS TEMPERATURE RANGE OF EFFECT A REDUCTION OF ABOUT 20% TO ABOUT 50%. THE COMPOSITE MAY BER FURTHER REDUCED TO OBTAIN FINAL GAGE. THE PRODUCT PRODUCED BY CLADDING COPPER AND ALUMINUM ON THE SURFACES OF A FERROUS SUBSTRATE IS ALSO DESCRIBED AND CLAIMED.
Inventors
- 👤 J Forand
Bibliographic Details
Claims Analysis
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |