Patent US3630768A successfully refreshed from Google Patents.
US3630768A
Expired / Lapsed
US
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Chemical deposition formation of anodes
Assignee: Electronor Corp
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Filing: 1966-06-28
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Granted: 1971-12-28
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Expires: 1986-06-28
Abstract
Abstract Compositions and method for chemical deposition of platinum group metals on a base structure and to novel electrodes produced by the said method. The invention relates particularly, but not exclusively, to electrodes for use in the electrolysis of salt solutions.
Inventors
- 👤 Giuseppe Bianchi
- 👤 Antonio Nidola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:18
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/081
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
The method of claim 1 wherein the heating temperature is 400* to 600* C.
Claim 2
Dependent Claim
22 words
The method of claim 1 wherein the platinum group metal is 60 to 100 percent platinum and 40 to 0 percent iridium.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the coating composition is applied in a series of applications with an intermediate heating after each coating.
Claim 4
Independent Claim
139 words
A method of forming a coating containing a platinum group metal on a valve metal anode base comprising applying a coating composition comprising a solution of at least one platinum group metal ammonium compound and 0.05 to 0.5 percent by weight of an ammonium halide dissolved in formamide, the platinum group metal content being about 1.25 to 2.5 percent by weight of the composition to the valve metal base in a series of applications with intermediate heating up to 600* C. after each coating, applying a final coating of the coating composition to the valve metal base, heating the coated base at 350* to 650* C. to form a continuous, adherent coating of the platinum group metal on the valve metal anode base and cooling the coated base in air to form an anode suitable for electrolysis of brines.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein the organic solvent is formamide.
Claim 6
Dependent Claim
41 words
The method of claim 1 wherein the coating composition contains 0.05 percent to 0.5 percent by weight of the total composition of a component selected from the group consisting of ammonium salts, lower alkyl quaternary ammonium salts, hydrazine and organic hydrazines.
References Cited (Backward Citations)
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Cited
US2787540A
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US2719797A
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US2999767A
Cited
US3177131A
Cited
US3294578A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |