US3922180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for oxidation-hardening metal alloy compositions, and compositions and structures therefrom
Assignee: AT&T Inc
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Filing: 1972-02-15
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Granted: 1975-11-25
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Expires: 1992-02-15
Abstract
Abstract Relatively nonoxidizable metals and alloys, such as Cu, Ag and Au and their alloys, may be internally oxidation-hardened by forming therein discrete particles of a second phase containing a relatively oxidizable metal such as Zr, and heating the resultant alloy in an atmosphere sufficiently oxidizing to result in the formation of oxide particles therein.
Inventors
- 👤 Edward Oscar Fuchs
- 👤 James Howe Swisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:40
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1078; H; H01; H01B; H01B1/00; H01B1/02; H01B1/026; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
THE METHOD FOR PRODUCING AN ELECTRICALLY CONDUCTIVE WIRE WHICH METHOD COMPRISES: SOLIDIFYING A MOLTEN ALLOY AND FROM ABOUT 0.1 WEIGHT PERCENT TO ABOUT 1.0 WEIGHT PERCENT OF ZIRCONIUM INTO A BODY WHICH SAID COPPER FORMS A FIRST SOLID PHASE AND SAID ZIRCONIUM IS PRESENT IN AN AMOUNT WHICH FORMS A SECOND SOLID PHASE OF ZRCU3, MECHANICALLY WORKING SAID BODY TO A REDUCTION IN CROSS-SECTIONAL AREA WHEREBY SAID SECOND PHASE IS DISPERSED AS DISCRETE PARTICAL WITHIN SAID FIRST PHASE. MAINTAINING SAID MECHANICALLY WORKED BODY AT A TEMPERATURE OF AT LEAST 700*C BUT BELOW THE MELTING POINT OF THE ALLOY IN AN ATMOSPHERE CONTAINING OXYGEN AT A PARTIAL
Claim 2
Independent Claim
106 words
THE METHOD FOR PRODUCING AN ELECTRICALLY CONDUCTIVE WIRE WHICH METHOD COMPRISES: SOLIDIFYING A MOLTEN ALLOY AND FROM ABOUT 0.1 WEIGHT PERCENT TO ABOUT 1.0 WEIGHT PERCENT OF ZIRCONIUM INTO A BODY WHICH SAID COPPER FORMS A FIRST SOLID PHASE AND SAID ZIRCONIUM IS PRESENT IN AN AMOUNT WHICH FORMS A SECOND SOLID PHASE OF ZRCU3, MECHANICALLY WORKING SAID BODY TO A REDUCTION IN CROSS-SECTIONAL AREA WHEREBY SAID SECOND PHASE IS DISPERSED AS DISCRETE PARTICAL WITHIN SAID FIRST PHASE. MAINTAINING SAID MECHANICALLY WORKED BODY AT A TEMPERATURE OF AT LEAST 700*C BUT BELOW THE MELTING POINT OF THE ALLOY IN AN ATMOSPHERE CONTAINING OXYGEN AT A PARTIAL
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the said mechanical working of the body is equivalent to an area reduction of at least 90 percent.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the body subjected to oxidation hardening is a rod having a diameter of the order of one-fourth inch.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |