US3143442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-base alloys and method of heat treating them
Assignee: Duracell Inc USA
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Filing: 1962-01-23
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Granted: 1964-08-04
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Expires: 1982-01-23
Abstract
No abstract record available.
Inventors
- 👤 Watts George Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/222; C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF PRODUCING A COPPER-BASE ALLOY WELDING ELECTRODE MATERIAL WHICH COMPRISES PREPARING A COPPERBASE ALLOY CONTAINING FROM A SMALL BUT EFFECTIVE AMOUNT UP TO 2% BY WEIGHT OF CHROMIUM AND A SMALL BUT EFFECTIVE AMOUNT UP TO 0.1% BY WEIGHT OF ZIRCONIUM AND BALANCE COPPER AND SUBJECTING SAID ALLOY TO A HEAT-TREATMENT COMPRISING HEATING THE ALLOY TO A TEMPERATURE VARYING FROM ABOVE 1000*C. UP TO THE SOLIDUS TEMPERATURE OF THE ALLOY, RAPIDLY QUENCHING THE ALLOY FROM THIS TEMPERATURE AND SUBSEQUENTLY AGEING THE ALLOY AT A TEMPERATURE OF 300-500*C. FOR A TIME SO AS FULLY T DEVELOP THE OVERALL PROPERTIES THEREOF.
Claim 2
Independent Claim
101 words
A METHOD OF PRODUCING A COPPER-BASE ALLOY WELDING ELECTRODE MATERIAL WHICH COMPRISES PREPARING A COPPERBASE ALLOY CONTAINING FROM A SMALL BUT EFFECTIVE AMOUNT UP TO 2% BY WEIGHT OF CHROMIUM AND A SMALL BUT EFFECTIVE AMOUNT UP TO 0.1% BY WEIGHT OF ZIRCONIUM AND BALANCE COPPER AND SUBJECTING SAID ALLOY TO A HEAT-TREATMENT COMPRISING HEATING THE ALLOY TO A TEMPERATURE VARYING FROM ABOVE 1000*C. UP TO THE SOLIDUS TEMPERATURE OF THE ALLOY, RAPIDLY QUENCHING THE ALLOY FROM THIS TEMPERATURE AND SUBSEQUENTLY AGEING THE ALLOY AT A TEMPERATURE OF 300-500*C. FOR A TIME SO AS FULLY T DEVELOP THE OVERALL PROPERTIES THEREOF.
References Cited (Backward Citations)
US2025662A
Cited
US2127596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |