Patent US4131519A successfully refreshed from Google Patents.
US4131519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode electrocatalyst
Assignee: PPG Industries Inc
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Filing: 1977-09-12
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Granted: 1978-12-26
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Expires: 1997-09-12
Abstract
Abstract Disclosed is a method of electolyzing aqueous solutions of alkali metal chlorides, such as sodium chloride brine, where an electrical current is passed from an anode to the cathode, evolving chlorine at the anode and hydrogen at the cathode. According to the disclosed method the cathode has a ferrous substrate with an electroplated coating thereon containing a transition metal. Also disclosed is a method of electroplating the transition metal onto the ferrous cathode substrate from an electroless plating solution.
Inventors
- 👤 Aleksandrs Martinsons
- 👤 Marilyn Crenshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:40
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/562; C23; C23C; C23C18/00; C23C18/16; C23C18/48; C23C18/50; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25D5/00; C25D5/34; C25D5/36; Y; Y10; Y10S; Y10S205/00; Y10S205/916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A method of forming an electroconductive surface on a ferrous substrate comprising: inserting the ferrous substrate into an electroless plating solution comprising a. a tungsten salt; b. salts chosen from the group consisting of cobalt salts, nickel salts, and mixtures thereof; c. a phosphorous containing reducing agent; d. an acid complexing agent; and e. a buffering agent; electrolessly depositing a coating from said solution onto said substrate; and subsequently electrolytically depositing a coating of at least 3 × 10 -5 equivalent of metal per square centimeter of substrate from said solution onto said substrate as a cathode whereby to provide a surface on said ferrous substrate comprising tungsten, phosphorous, and a metal chosen from the group consisting of cobalt, nickel, and mixtures thereof.
Claim 2
Independent Claim
123 words
A method of forming an electroconductive surface on a ferrous substrate comprising: inserting the ferrous substrate into an electroless plating solution comprising a. a tungsten salt; b. salts chosen from the group consisting of cobalt salts, nickel salts, and mixtures thereof; c. a phosphorous containing reducing agent; d. an acid complexing agent; and e. a buffering agent; electrolessly depositing a coating from said solution onto said substrate; and subsequently electrolytically depositing a coating of at least 3 × 10 -5 equivalent of metal per square centimeter of substrate from said solution onto said substrate as a cathode whereby to provide a surface on said ferrous substrate comprising tungsten, phosphorous, and a metal chosen from the group consisting of cobalt, nickel, and mixtures thereof.
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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |