Patent US3945899A successfully refreshed from Google Patents.
US3945899A
Expired / Lapsed
US
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Process for coating aluminum or aluminum alloy
Assignee: Kansai Paint Co Ltd
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Filing: 1974-07-01
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Granted: 1976-03-23
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Expires: 1994-07-01
Abstract
Abstract A process for coating an aluminum or aluminum alloy comprising the steps of subjecting the aluminum or aluminum alloy to boehmite treatment or chemical conversion treatment, anodizing the resulting aluminum or aluminum alloy in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating the aluminum or aluminum alloy with an organic coating composition to form a resin layer, said oxyacid being at least one oxyacid selected from the group consisting of silicic acid, boric acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.
Inventors
- 👤 Norio Nikaido
- 👤 Shinji Shirai
- 👤 Mototaka Iihashi
- 👤 Sueo Umemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:34
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C23C22/05; C23C22/60; C23C22/66; C23C22/68; C23C22/73; C23C22/78; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D13/00; C25D13/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
111 words
A process for coating an aluminum or aluminum alloy comprising the steps of subjecting the aluminum or aluminum alloy to treatment with steam or hot water to form a boehmite layer or to chemical conversion treatment with at least one of phosphate and chromate, electrolytically anodizing the resulting aluminum or aluminum alloy in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating the aluminum or aluminum alloy with an organic coating composition to form a resin layer, said oxyacid being at least one oxyacid selected from the group consisting of silicic acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.
Claim 2
Dependent Claim
111 words
A process for coating an aluminum or aluminum alloy comprising the steps of subjecting the aluminum or aluminum alloy to treatment with steam or hot water to form a boehmite layer or to chemical conversion treatment with at least one of phosphate and chromate, electrolytically anodizing the resulting aluminum or aluminum alloy in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating the aluminum or aluminum alloy with an organic coating composition to form a resin layer, said oxyacid being at least one oxyacid selected from the group consisting of silicic acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.
Claim 3
Dependent Claim
34 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the aluminum or aluminum alloy is subjected to treatment with steam or hot water to form a boehmite layer.
Claim 4
Dependent Claim
34 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the aluminum or aluminum alloy is subjected to chemical conversion treatment with at least one of phosphate and chromate.
Claim 5
Dependent Claim
35 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the concentration of said water-soluble salt in the aqueous solution is in the range of 0.1 weight percent to saturation.
Claim 6
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 4, in which said concentration is in the range of 1.0 weight percent to saturation.
Claim 7
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of silicic acid.
Claim 8
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of tungstic acid.
Claim 9
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of phosphoric acid.
Claim 10
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of molybdic acid.
Claim 11
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of vanadic acid.
Claim 12
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of permanganic acid.
Claim 13
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which said water-soluble salt is at least one water-soluble salt of stannic acid.
Claim 14
Dependent Claim
28 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the aluminum or aluminum alloy is electrophoretically coated with an organic coating composition.
Claim 15
Dependent Claim
27 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the organic composition is electrostatically coated on the aluminum or aluminum alloy.
Claim 16
Dependent Claim
32 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the aluminum or aluminum alloy is coated by electrostatic spray coating method with an organic coating composition.
Claim 17
Dependent Claim
30 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the aluminum or aluminum alloy is coated by spray-coating method with an organic coating composition.
Claim 18
Dependent Claim
28 words
The process for coating an aluminum or aluminum alloy according to claim 1, in which the organic composition is coated on the aluminum or aluminum alloy by immersion-coating.
Claim 19
Dependent Claim
13 words
An aluminum or aluminum alloy coated by the method claimed in claim 1.
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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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |