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Patent US3793092A successfully refreshed from Google Patents.
US3793092A
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US
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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 09:32
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)
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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) | 1977-02-18 | 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 |