Patent US3598578A successfully refreshed from Google Patents.
US3598578A
Expired / Lapsed
US
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Electrical resistance alloy and method of producing same
Assignee: Carpenter Technology Corp
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Filing: 1969-03-28
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Granted: 1971-08-10
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Expires: 1989-03-28
Abstract
Abstract AN ELECTRICAL RESISTANCE ALLOY CHARACTERIZED BY A TEMPERATURE COEFFICIENT OF RESISTANCE WHICH MAINTAINS AN ESSENTIALLY CONSTANT FIXED VALUE APPROACHING ZERO OVER A SELECTED TEMPERATURE RANGE AND COMPRISING, AS EXPRESSED IN PERCENT BY WEIGHT, THE FOLLOWING MAJOR CONSTITUENTS: PERCENT ALUMINUM 2.75-3.75 MANGANESE 4.0-5.5 SILICON 0.70-1.25 CHROMIUM 17.5-22.5 NICKEL BALANCE TO THIS IS ADDED AS A MINOR CONSITUENT AT LEAST ONE DEOXIDIZER SELECTED FROM THE CLASS CONSISTING OF ZIRCONIUM CALCIUM AND MAGNESIUM IN AN AMOUNT UP TO 0.1%. THE ALLOY IS PRODUCED BY A PROCESS IN WHICH IT IS STRANDED ANNEALED, RAPID COOLED, HEAT TREATED AND SLOW COOLED.
Inventors
- 👤 Teh Po Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |