US3864224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of oxides
Assignee: IMP METAL IND HYNOCH Ltd
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Filing: 1972-04-25
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Granted: 1975-02-04
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Expires: 1992-04-25
Abstract
Abstract Preparing oxides of film-forming metals by inserting electrically conductive bodies in a solution containing ions of film-forming metals, and anodically precipitating said oxides upon the first body.
Inventors
- 👤 Joseph Bernard Cotton
- 👤 Peter Charles Steele Hayfield
- 👤 Ian Robert Scholes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:35
CPC Classifications
C; C25; C25D; C25D9/00; C25D9/04; C25D9/06; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
26 words
A method according to claim 1 wherein the surface of the first body is a film-forming metal or of an alloy based upon a film-forming metal.
Claim 2
Dependent Claim
46 words
A method according to claim 1 wherein the magnitude of the current density arising at the first body from the voltage applied thereto, and the temperature of said solution, are such that said oxides are precipitated to form a deposit adhering securely to the first body.
Claim 3
Dependent Claim
50 words
A method according to claim 1 wherein the magnitude of the current density arising at the first body from the voltage applied thereto, and the temperature of said solution, are such that said oxides are precipitated to form a deposit which is loosely adherent or non-adherent to the first body.
Claim 4
Dependent Claim
29 words
A method according to claim 1 wherein said solution is based upon an acid selected from the group consisting of sulphuric acid, hydrochloric acid, sulphamic acid and phosphoric acid.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein the solution is maintained at a temperature of about 90*C.
Claim 6
Dependent Claim
20 words
A method according to claim 2 wherein said first body is of titanium or of an alloy based upon titanium.
Claim 7
Dependent Claim
13 words
A method according to claim 1 wherein the first body is stainless steel.
Claim 8
Dependent Claim
22 words
A body having securely adherent thereon a coating of titanium oxide of a film-forming metal prepared in accordance with claim 3 herein.
Claim 9
Dependent Claim
11 words
Film-forming titanium oxide powders prepared in accordance with claim 4 herein.
Claim 10
Independent Claim
60 words
A method of preparing titanium dioxide comprising inserting first and second electrically conductive bodies in an acidic aqueous solution containing titanium cations and depositing a porous coating of titanium dioxide alone from said solution on to said first conductive body by applying a voltage across said conductive bodies to render said first body anodic with respect to said second body.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |