US3795590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coloring aluminum and alloys of aluminum having an anodized surface
Assignee: Cegedur GP
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Filing: 1969-12-18
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Granted: 1974-03-05
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Expires: 1989-12-18
Abstract
Abstract THE PRODUCTION OF CORROSION RESISTANT REPRODUCIBLE COLORS ON THE SURFACE OF ALUMINUM AND ALLOYS OF ALUMINUM WHEREIN AN ALUMINUM OXIDE LAYER IS FORMED ON THE SURFACE BY ANODIZATION AND THE COLORED PARTICLES OF A METAL OR COMPOUND OF A METAL ARE DEPOSITED IN THE POROUS SURFACE BY ALTERNATING CURRENT ELECTROLYSIS WITH THE OBJECT MOUNTED AS AN ELECTRODE IN AN ELECTROLYTE CONTAINING THE CONSTITUENT METAL AND WHEREIN THE OBJECT WITH THE COLORED PARTICLES DEPOSITED THEREIN IS SUBJECTED TO ANODIC TREATMENT IN AN ELECTROLYTE CONTAINING AN ALKALI METAL OR AMMONIUM THIOSULPHATE, WITHOUT AND PREFERABLY WITH SUBSEQUENT SEALING.
Inventors
- 👤 J Patrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:10
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/12; C25D11/18; C25D11/20; C25D11/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |