US3664932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Objects of aluminum and alloys of aluminum having colored coatings and process
Assignee: Cegedur GP
•
Filing: 1969-12-03
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Granted: 1972-05-23
•
Expires: 1989-12-03
Abstract
Abstract The process for providing colored coatings on aluminum and alloys of aluminum in which the surface is first anodized to form a porous layer and colored particles of metal compound are deposited in the porous layer by alternating current electrolysis with the object mounted as an electrode in an electrolyte containing the salt of the metal, and then subjecting the deposited particles to dissolution by mounting the object as an anode for direct or rectified current electrolysis until a color of the desired value is secured.
Inventors
- 👤 Jos Patrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/20; C25D11/22; B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
19 words
The process as claimed in claim 1 which includes the step of sealing the colored coating that is formed.
Claim 2
Dependent Claim
17 words
The process as claimed in claim 2 in which the colored coating is sealed with boiling water.
Claim 3
Dependent Claim
16 words
The process as claimed in claim 1 in which the current for dissolution is direct current.
Claim 4
Dependent Claim
17 words
The process as claimed in claim 1 in which the current for dissolution is rectified unfiltered current.
Claim 5
Dependent Claim
43 words
The process as claimed in claim 1 in which the electrolytic bath for thE alternating current electrolysis is the same as the electrolytic bath for dissolution so that the object remains in the same bath for both direct current electrolysis and dissolution electrolysis.
Claim 6
Dependent Claim
29 words
The process as claimed in claim 6 in which the change from alternating current to direct or rectified current is effected by merely switching from one to the other.
Claim 7
Dependent Claim
35 words
The process as claimed in claim 1 which includes the step of subjecting the object to be colored to a surface treatment prior to electrolysis treatment to modify the appearance of the formed colored coating.
Claim 8
Dependent Claim
37 words
The process as claimed in claim 1 in which the metal compound deposited in the porous layer contains a compound of copper to produce a color within the range of pink to copper red to bright red.
Claim 9
Dependent Claim
33 words
The process as claimed in claim 1 in which the metal compound deposited in the porous layer contains a compound of cobalt to produce a clear bronze color effect in the colored coating.
Claim 10
Dependent Claim
34 words
The process as claimed in claim 1 in which the metal compound deposited in the porous layer contains a compound of nickel to produce a uniform clear bronze color effect in the colored coating.
Claim 11
Dependent Claim
21 words
The process as claimed in claim 1 in which the current for dissolution has a current density less than 5 A/dm2.
Claim 12
Dependent Claim
25 words
The process as claimed in claim 1 in which the current for dissolution has a current density within the range of 0.1 to 2 A/dm2.
Claim 13
Dependent Claim
22 words
The process as claimed in claim 1 in which the current for dissolution is within the range of 10 to 50 volts.
Claim 14
Dependent Claim
22 words
The process as claimed in claim 1 in which the current for dissolution is within the range of 15 to 25 volts.
Claim 15
Dependent Claim
25 words
The process as claimed in claim 1 in which the dissolution is carried out for a time within the range of 1/6 to 30 minutes.
Claim 16
Dependent Claim
25 words
The process as claimed in claim 1 in which the dissolution is carried out for a time within the range of 1/2 to 15 minutes.
Claim 17
Dependent Claim
20 words
An object of aluminum or alloy of aluminum having a uniform colored coating produced by the method of claim 1.
References Cited (Backward Citations)
US3382160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |