Patent US2875607A successfully refreshed from Google Patents.
Patent US3073762A successfully refreshed from Google Patents.
US3073762A
Expired / Lapsed
US
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Electrodeposition of cobalt phosphorus alloys
Assignee: International Business Machines Corp
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Filing: 1960-08-22
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Granted: 1963-01-15
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Koretzky Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:47
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/562; H; H01; H01F; H01F41/00; H01F41/14; H01F41/24; H01F41/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF ELECTROPLATING MAGNETIC COATINGS OF COBALT-PHOSPHORUS ALLOYS ON A SUBSTRATE WHICH COMPRISES SUBJECTING SAID SUBSTRATE TO ELECTROLYTIC ACTION IN A PLATING BATH HAVING A PH ABOUT 7.0-9.0 CONTAINING COBALT IONS IN THE RANGE 4.95-7.45 GRAMS PER LITER OF SOLUTION AND HYPOPHOSPHITE IONS IN THE RANGE 30.66-61.32 GRAMS PER LITER OF SOLUTION AT A CURRENT DENSITY BETWEEN 25-125 AMPS. PER SQ. FT. TO PRODUCE THEREBY A MAGNETIC COATING HAVING A COERCIVE FORCE AT LEAST 5000 OERSTEDS, A REMANENCE, BR, ABOVE 2000 GAUSS AND A SQUARENESS RATIO, BR/BS BETWEEN 0.7-0.8.
Claim 2
Independent Claim
90 words
A METHOD OF ELECTROPLATING MAGNETIC COATINGS OF COBALT-PHOSPHORUS ALLOYS ON A SUBSTRATE WHICH COMPRISES SUBJECTING SAID SUBSTRATE TO ELECTROLYTIC ACTION IN A PLATING BATH HAVING A PH ABOUT 7.0-9.0 CONTAINING COBALT IONS IN THE RANGE 4.95-7.45 GRAMS PER LITER OF SOLUTION AND HYPOPHOSPHITE IONS IN THE RANGE 30.66-61.32 GRAMS PER LITER OF SOLUTION AT A CURRENT DENSITY BETWEEN 25-125 AMPS. PER SQ. FT. TO PRODUCE THEREBY A MAGNETIC COATING HAVING A COERCIVE FORCE AT LEAST 5000 OERSTEDS, A REMANENCE, BR, ABOVE 2000 GAUSS AND A SQUARENESS RATIO, BR/BS BETWEEN 0.7-0.8.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |