US2942990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal plating by chemical reduction with borohydrides
Assignee: Metal Hydrides Inc
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Filing: 1959-01-26
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Granted: 1960-06-28
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Edward A Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:03
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A BATH FOR PLATING BY CHEMICAL DEPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT IN A CONCENTRATION BETWEEN ABOUT 0.02 AND 0.15 NORMAL, A BOROHYDRIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM BOROHYDRIDE, POTASSIUM BOROHYDRIDE AND TETRAMETHYLAMMONIUM BOROHYDRIDE, AN ALKALINE MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE, AN ALKALI METAL HYDROXIDE AND TETRAMETHYLAMMONIUM HYDROXIDE IN AN AMOUNT SUFFICIENT TO BRING THE PH OF THE SOLUTION TO BETWEEN ABOUT 12.0 AND 13.0, AND AN AGENT ADAPTED TO INHIBIT PRECIPITATION OF THE HYDROXIDE OF SAID SELECTED METAL, SAID AGENT BEING SELECTED FROM ALKALI METAL SALTS OF CARBOXYLIC ACIDS HAVING AT LEAST TWO CARBOXYL GROUPS AND BEING PRESENT IN A CONCENTRATION IN TERMS OF NORMALITY AT LEAST EQUAL TO THE NORMALITY OF THE SALT OF SAID SELECTED METAL.
Claim 2
Dependent Claim
141 words
A BATH FOR PLATING BY CHEMICAL DEPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT IN A CONCENTRATION BETWEEN ABOUT 0.02 AND 0.15 NORMAL, A BOROHYDRIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM BOROHYDRIDE, POTASSIUM BOROHYDRIDE AND TETRAMETHYLAMMONIUM BOROHYDRIDE, AN ALKALINE MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE, AN ALKALI METAL HYDROXIDE AND TETRAMETHYLAMMONIUM HYDROXIDE IN AN AMOUNT SUFFICIENT TO BRING THE PH OF THE SOLUTION TO BETWEEN ABOUT 12.0 AND 13.0, AND AN AGENT ADAPTED TO INHIBIT PRECIPITATION OF THE HYDROXIDE OF SAID SELECTED METAL, SAID AGENT BEING SELECTED FROM ALKALI METAL SALTS OF CARBOXYLIC ACIDS HAVING AT LEAST TWO CARBOXYL GROUPS AND BEING PRESENT IN A CONCENTRATION IN TERMS OF NORMALITY AT LEAST EQUAL TO THE NORMALITY OF THE SALT OF SAID SELECTED METAL.
References Cited (Backward Citations)
US2726170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |