US3616446A
Expired / Lapsed
US
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Method of coating an electrode
Assignee: PPG Industries Inc
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Filing: 1969-03-28
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Granted: 1971-10-26
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Expires: 1989-03-28
Abstract
Abstract The novel anode may be used in the electrolysis of an aqueous solution such as of alkali metal chloride. The anode includes a base member having a conductive coating or surface comprising an oxy-compound of a platinum group metal such as ruthenium and an alkaline earth metal, typically calcium, or a rare earth metal such as lanthanum.
Inventors
- 👤 Bernard J Dewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:06
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/26; C25B1/265; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
The anode as described in claim 1 wherein said alkaline earth metal is a member selected from the group consisting of barium, calcium, strontium, and magnesium.
Claim 2
Dependent Claim
37 words
The anode as described in claim 1 wherein said rare earth metal is a member selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium.
Claim 3
Dependent Claim
27 words
The anode as described in claim 2 wherein said platinum metal is a member selected from the group consisting of rhodium, palladium, osmium, iridium, platinum, and ruthenium.
Claim 4
Dependent Claim
29 words
The anodes as described in claim 4 wherein said surface is comprised of a member selected from the group consisting of calcium ruthenate, calcium ruthenite, strontium ruthenate, strontium ruthenite.
Claim 5
Dependent Claim
13 words
The anode as described in claim 5 wherein said surface is substantially amorphous.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |