US3152974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating magnetic cobalt alloys
Assignee: Raytheon Co
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Filing: 1962-07-18
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Granted: 1964-10-13
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Zentner Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:16
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/18; C25D3/00; C25D3/02; C25D3/56; C25D3/562; H; H01; H01F; H01F41/00; H01F41/14; H01F41/24; H01F41/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A METHOD OF ELECTROPLATING A MAGNETIC COATING OF COBALT ALLOY UPON AN ARTICLE WHICH COMPRISES THE STEPS OF SUBMERGING THE ARTICLE IN ANELECTROPLATING BATH COMPRISING ABOUT 55 GRAMS PER LITER OF COBALT SULPHATE, ABOUT 5 GRAMS PER LITER OF COBALT CHLORIDE, ABOUT 2 TO ABOUT 6 GRAMS PER LITER OF SODIUM TUNGSTATE, AND ABOUT 32 GRAMS PER LITER OF BORIC ACID, MAINTAINING THE PH OF THE ELECTROPLATING BATH AT ABOUT 5.0, MAINTAINING THE BATH TEMPERATURE AT ABOUT 70*C., ROTATING THE ARTICLE AT THE RATE OF ABOUT 70 R.P.M., PASSING ELECTRICAL DIRECT CURRENT THROUGH THE BATH AT A CURRENT DENSITY OF ABOUT 100 AMPERES PER SQUARE FOOT OF AREA OF THE ARTICLE, SIMULTANEOUSLY PASSING AN ALTERNATING CURRENT THROUGH THE BATHWHILE MAINTAINING A SUPERIMPOSED A.C. TO D.C. RATIO OF ABOUT 3:1, AND MAINTAINING AN A.C. ELECTRODE DISTANCE FROM THE ARTICLE OF ABOUT 0.5 TO ABOUT 1.0 INCH.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |