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US4190516A
Expired / Lapsed
US
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Cathode
Assignee: Tokuyama Corp
•
Filing: 1978-06-26
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Granted: 1980-02-26
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Expires: 1998-06-26
Abstract
Abstract A cathode consisting essentially of a base material of copper, iron or nickel and formed thereon, a sintered coating composed mainly of at least one metal of Group VIII of the periodic table, said sintered coating having been prepared by coating said base material with a solution or suspension of a compound of said metal of Group VIII and heating the coating.
Inventors
- 👤 Yoshihisa Kajimaya
- 👤 Takahide Kojima
- 👤 Yoshio Murakami
- 👤 Shunji Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:26
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/04; C25B11/051; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A cathode consisting essentially of a base material of copper, iron or nickel and formed thereon, a sintered coating composed mainly of at least one metal of Group VIII of the periodic table, said sintered coating having been prepared by (1) coating said base material with a solution or suspension of at least one sulfur-containing compound of said metal of Group VIII, which sulfur-containing metal compounds are capable of being predominantly converted to a metal by sintering said compounds, and (2) heating the coating, said sintered coating containing at least 3% of sulfur in terms of the sulfur index as defined in the specification.
Claim 2
Dependent Claim
104 words
A cathode consisting essentially of a base material of copper, iron or nickel and formed thereon, a sintered coating composed mainly of at least one metal of Group VIII of the periodic table, said sintered coating having been prepared by (1) coating said base material with a solution or suspension of at least one sulfur-containing compound of said metal of Group VIII, which sulfur-containing metal compounds are capable of being predominantly converted to a metal by sintering said compounds, and (2) heating the coating, said sintered coating containing at least 3% of sulfur in terms of the sulfur index as defined in the specification.
Claim 3
Dependent Claim
19 words
The cathode of claim 1 wherein said solution or suspension further includes a suspending aid or a suspension stabilizer.
Claim 4
Dependent Claim
23 words
The cathode of claim 1 wherein the metal compound is a sulfur containing nickel compound, or a sulfur containing iron compound, or both.
Claim 5
Dependent Claim
27 words
The cathode of claim 3 wherein the nickel compound is at least one member selected from the group consisting of nickel dithiocarboxylate, nickel dithiocarbamate and nickel xanthate.
Claim 6
Dependent Claim
31 words
The cathode of claim 3 wherein the nickel compound is at least one member selected from the group consisting of nickel thiocyanate, nickel sulfide, nickel thiosulfate, nickel sulfate and nickel sulfite.
Claim 7
Dependent Claim
16 words
The cathode of claim 1 wherein the metal compound is a sulfur containing inorganic metal compound.
Claim 8
Dependent Claim
16 words
The cathode of claim 1 wherein the metal compound is a sulfur containing organic metal compound.
Claim 9
Dependent Claim
34 words
The cathode of claim 1 wherein the metal compound is at least one sulfur-containing compound selected from the group consisting of a sulfur-containing platinum compound, a sulfur-containing iridium compound and a sulfur-containing palladium compound.
Claim 10
Dependent Claim
34 words
The cathode of claim 1 wherein the metal compound is at least one sulfur-containing compound selected from the group consisting of a sulfur-containing ruthenium compound, a sulfur-containing osmium compound and a sulfur-containing rhodium compound.
Claim 11
Dependent Claim
42 words
The cathode of claim 1 wherein the solution or suspension contains a polymeric substance selected from the group consisting of polyvinyl alcohol, methyl cellulose, polyacrylic acid, starch, gelatin, polyethylene glycol, polyethylene oxide, polyphosphoric acid, a salt of polyphosphoric acid and water glass.
Claim 12
Dependent Claim
21 words
The cathode of claim 1 wherein the solution or suspension has a viscosity of from about 50 to about 1500 centipoises.
References Cited (Backward Citations)
US3282808A
Cited
US3461044A
Cited
US3632498A
Cited
US3607411A
Cited
US3649485A
Cited
US3722045A
Cited
US3877987A
Cited
US3947333A
Cited
US3974058A
Cited
US3990957A
Cited
US4086149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |