US3793092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine-grained, completely decrystallized, annealed cobalt-iron-vanadium articles and method
Assignee: General Electric Co
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Filing: 1972-11-10
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Granted: 1974-02-19
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Expires: 1992-11-10
Abstract
Abstract Sheet or strip articles composed of an alloy nominally composed of about 49 percent cobalt, 49 percent iron and 2 per cent vanadium are disclosed which have a 0.2 per cent yield strength of about 70,000 p.s.i. or greater and a magnetic induction of about 20,000 gausses or greater at 13 oersteds and 22,400 gausses or greater at 85 oersteds are disclosed.
Inventors
- 👤 H Fieldler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:10
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; C; C22; C22C; C22C19/00; C22C19/07; C22C38/00; C22C38/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A method of processing an alloy consisting essentially of 49 percent iron, 49 percent cobalt and 2 percent vanadium, to develop an improved combination of magnetic properties and strength which comprises continuously annealing said alloy at a temperature from about 1367*F to 1418*F for a time sufficient to produce an average grain size of about 8 microns or less and a completely recrystallized grain structure and cooling to produce an annealed product which is characterized by the absence of the non-magnetic gamma phase and having a magnetic induction of at least 20,000 gauss in a field of 13 oersteds and at least about 22,400 gauss in a field of 85 oersteds and a yield strength of at least 70,000 psi.
References Cited (Backward Citations)
US1862559A
Cited
US2512358A
Cited
US2717223A
Cited
US3065118A
Cited
US3024141A
Cited
US3511639A
Cited
US3597286A
Cited
US3622409A
Cited
US3657026A
Cited
US3695944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |