US4589959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for electrolytic treatment of metal by liquid power feeding
Assignee: De Nora Permelec Ltd
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Filing: 1984-12-12
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Granted: 1986-05-20
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Expires: 2004-12-12
Abstract
Abstract A process for electrolytic treatment of a metallic object by the liquid power feeding method comprising an electrolyte containing an organic acid or a salt thereof, an electrode comprising a substrate of corrosion-resistant metal and an electrode coating based on the presence of at least some iridium oxide and formed on the substrate, where such functions advantageously as a stable anode enjoying long service life.
Inventors
- 👤 Syuji Nakamatsu
- 👤 Takayuki Shimamune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D17/00; C25D17/10; C25D17/12; C25F; C25F3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A process for the electrolytic treatment of metal with an electrolyte containing adipic acid or an ammonium salt thereof, comprising feeding power indirectly through the electrolyte without contacting an anode with the metal by the liquid power feeding method and using as an anode for said liquid power feeding an insoluble anode comprising a substrate of a corrosion-resistant metal and an electrode coating consisting of 40 mol % or more of iridium oxide and 60 mol % or less of the oxide of a metal selected from the group consisting of rhodium, titanium, tantalum, niobium, cobalt, manganese and mixtures thereof and formed on said substrate.
Claim 2
Dependent Claim
105 words
A process for the electrolytic treatment of metal with an electrolyte containing adipic acid or an ammonium salt thereof, comprising feeding power indirectly through the electrolyte without contacting an anode with the metal by the liquid power feeding method and using as an anode for said liquid power feeding an insoluble anode comprising a substrate of a corrosion-resistant metal and an electrode coating consisting of 40 mol % or more of iridium oxide and 60 mol % or less of the oxide of a metal selected from the group consisting of rhodium, titanium, tantalum, niobium, cobalt, manganese and mixtures thereof and formed on said substrate.
References Cited (Backward Citations)
US1266557A
Cited
US1916586A
Cited
US2541275A
Cited
US3359190A
Cited
US3989605A
Cited
US3920525A
Cited
US4113579A
Cited
DE2844558A1
Cited
US4406757A
Cited
US4457824A
Cited
US4437946A
Cited
US4481084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |