US4066516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming colorless or colored pattern having shade difference on an aluminum or aluminum alloy article
Assignee: Nippon Light Metal Co Ltd
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Filing: 1976-06-11
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Granted: 1978-01-03
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Expires: 1996-06-11
Abstract
Abstract Colored pattern having shade difference on an aluminum or aluminum alloy article is formed by anodically oxidizing said article in a conventional manner, and applying the anodically oxidized aluminum or aluminum alloy article to a voltage 5-190 V higher than the voltage applied in the anodic oxidation at a portion corresponding to the pattern in an electrolytic bath to increase thickness of barrier layer and then coloring the thus treated article in a solution containing a metal salt.
Inventors
- 👤 Toshihiko Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:33
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/20; C25D11/22; C25D11/022; C25D11/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A method of forming a colored pattern on an aluminum or aluminum alloy article which comprises: A. anodically oxidizing said article at a voltage of from 10-120 volts; B. forming a barrier layer on those areas not to be colored by subjecting said areas to a second anodic oxidation at a voltage of from 15-200 V wherein said voltage is at least 5 volts greater than the voltage applied in Step A; and C. electrolytically coloring said article utilizing an electrolytic metal salt bath at a voltage of from 5-75 volts wherein only those areas not subjected to said second anodic oxidation are colored.
Claim 2
Independent Claim
104 words
A method of forming a colored pattern on an aluminum or aluminum alloy article which comprises: A. anodically oxidizing said article at a voltage of from 10-120 volts; B. forming a barrier layer on those areas not to be colored by subjecting said areas to a second anodic oxidation at a voltage of from 15-200 V wherein said voltage is at least 5 volts greater than the voltage applied in Step A; and C. electrolytically coloring said article utilizing an electrolytic metal salt bath at a voltage of from 5-75 volts wherein only those areas not subjected to said second anodic oxidation are colored.
Claim 3
Dependent Claim
34 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein the Step B and Step C are repeated two or more times.
Claim 4
Dependent Claim
47 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein at least one of viscosity regulators of a polyhydric alcohol, clay and water is added to the high voltage type organic acid or inorganic acid.
Claim 5
Dependent Claim
54 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein the high voltage type organic acid is oxalic acid, sulfosalicyclic acid, phenolsulfonic acid, cresolsulfonic acid, malonic acid, tartaric acid, phthalic acid, succinic acid, maleic acid, glycolic acid, citric acid or malic acid.
Claim 6
Dependent Claim
41 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein the high voltage type inorganic acid is, sulfamic acid, boric acid, ammonium borate, phosphoric acid, chromic acid or phosphorusmolybdate.
Claim 7
Dependent Claim
50 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein the aluminum or aluminum alloy article having colored pattern is heated in a boiled water for 15-45 minutes to seal pores on the aluminum or aluminum alloy surface.
Claim 8
Dependent Claim
37 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 1, wherein the aluminum or aluminum alloy article having colored pattern is finished by a conventional painting.
Claim 9
Independent Claim
102 words
A method of forming a colored pattern on an aluminum or an aluminum alloy article which comprises: A. anodically oxidizing said article at a voltage of from 10-120 volts; B. electrolytically coloring said article utilizing an electrolytic metal salt bath at a voltage of from 5-75 volts, and C. forming a barrier layer on those areas wherein the amount of metal deposited by said electrolytic coloring is to be reduced by subjecting said areas to a second anodic oxidation at a voltage of from 15-200 V wherein said voltage is at least 5 volts greater than the voltage applied in Step A.
Claim 10
Independent Claim
102 words
A method of forming a colored pattern on an aluminum or an aluminum alloy article which comprises: A. anodically oxidizing said article at a voltage of from 10-120 volts; B. electrolytically coloring said article utilizing an electrolytic metal salt bath at a voltage of from 5-75 volts, and C. forming a barrier layer on those areas wherein the amount of metal deposited by said electrolytic coloring is to be reduced by subjecting said areas to a second anodic oxidation at a voltage of from 15-200 V wherein said voltage is at least 5 volts greater than the voltage applied in Step A.
Claim 11
Dependent Claim
34 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein the Step B and Step C are repeated two or more times.
Claim 12
Dependent Claim
47 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein at least one of viscosity regulators of a polyhydric alcohol, clay and water is added to the high voltage type organic acid or inorganic acid.
Claim 13
Dependent Claim
54 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein the high voltage type organic acid is oxalic acid, sulfosalicylic acid, phenolsulfonic acid, cresolsulfonic acid, malonic acid, tartaric acid, phthalic acid, succinic acid, maleic acid, glycolic acid, citric acid or malic acid.
Claim 14
Dependent Claim
41 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein the high voltage type inorganic acid is sulfamic acid, boric acid, ammonium borate, phosphoric acid, chromic acid or phosphorusmolybdate.
Claim 15
Dependent Claim
50 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein the aluminum or aluminum alloy article having colored pattern is heated in a boiled water for 15-45 minutes to seal pores on the aluminum or aluminum alloy surface.
Claim 16
Dependent Claim
37 words
A method for forming colored pattern having shade difference on an aluminum or aluminum alloy article as claimed in claim 8, wherein the aluminum or aluminum alloy article having colored pattern is finished by a conventional painting.
References Cited (Backward Citations)
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |