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US4023965A
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Ni-Fe-Rh alloys
Assignee: International Business Machines Corp
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Filing: 1976-06-03
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Granted: 1977-05-17
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Expires: 1996-06-03
Abstract
Abstract Permalloy type alloys containing rhodium suitable for use in magnetic devices and having improved resistance to corrosion contain from about 65 to 90 atomic percent nickel, 10 to 35 atomic percent iron and 1 to 25 atomic percent rhodium. Magnetic films made of these alloys which contain 1 to 10 atomic percent rhodium exhibit magnetic properties similar to Permalloy while having increased resistance to corrosion.
Inventors
- 👤 James Carr Suits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:06
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14708; C; C22; C22C; C22C19/00; C22C19/03; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
An improved corrosion resistant ferromagnetic composition comprising (Ni.sub.a Fe.sub.100-a).sub.100-x Rh.sub.x where a is 65 to 90 atomic percent x is 1 to 25 atomic percent.
Claim 2
Dependent Claim
25 words
An improved corrosion resistant ferromagnetic composition comprising (Ni.sub.a Fe.sub.100-a).sub.100-x Rh.sub.x where a is 65 to 90 atomic percent x is 1 to 25 atomic percent.
Claim 3
Dependent Claim
13 words
A composition as described in claim 1 wherein x is 2 to 10%.
Claim 4
Dependent Claim
13 words
A composition as described in claim 1 wherein x is 4 to 6%.
Claim 5
Dependent Claim
15 words
A composition as described in claim 1 wherein a is 75 to 85 atomic percent.
References Cited (Backward Citations)
US3067029A
Cited
US3140942A
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US3540864A
Cited
GB1125690A
Cited
US3519498A
Cited
FR2063694A5
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |