Patent US3690944A successfully refreshed from Google Patents.
US3690944A
Expired / Lapsed
US
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Electroless nickel plating method
Assignee: RCA Corp
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Filing: 1970-03-10
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Granted: 1972-09-12
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Expires: 1990-03-10
Abstract
Abstract A METHOD FOR ELECTROLESSLY PLATING NICKEL FROM A BATH COMPRISING (I) A NICKEL SALT; (II) A NICKEL ION COMPLEXING AGENT; (III) A SOURCE OF HYDROPHOSPHITE IONS; AND (IV) AMMONIUM HYDROXIDE, IN WHICH THE MOLAR CONCENTRATION RATIO OF NICKEL TO HYPOPHOSPHITE IONS IS LESS THAN 0.2. THE BATH EXHIBITS A PLATING RATE SUBSTANTIALLY INDEPENDENT OF HYPOPHOSPHITE ION CONCENTRATION.
Inventors
- 👤 Nathan Feldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |