US3759801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolysis bath and process for electrolytically coloring anodized aluminum
Assignee: Individual
•
Filing: 1971-11-18
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Granted: 1973-09-18
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Expires: 1991-11-18
Abstract
Abstract AN ELECTROLYSIS BATH FOR COLORING PREVIOUSLY ANODIZED ALUMINUM AND ALLOYS OF ALUMINUM BY MEANS OF AN ALTERNATING CURRENT ELECTROLYSIS IN AN AQUEOUS ACID SOLUTION CONTAINING NICKEL SULPHATE IN AN AMOUNT WITHIN THE RANGE OF 50 TO 150 G./LITER, AMMONIUM SULPHATE AND BORIC ACID IN AN AMOUNT WITH THE RANGE OF 45 TO 60 G./LITER, AND AT A PH WITHIN THE RANGE OF 3.5 TO 5.2.
Inventors
- 👤 J Patrie
- 👤 M Legrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; 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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |