US3751350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coloring an aluminum anodic oxide film
Assignee: Aiden KK
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Filing: 1972-03-03
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Granted: 1973-08-07
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Expires: 1992-03-03
Abstract
Abstract A PROCESS FOR COLORING ALUMINUM ANODIC OXIDE FILMS IN WHICH ALUMINUM OR AN ALUMINUM ALLOY WITH AN ANODIC OXIDE FILM IS USED AS A CATHODE AND IS ALTERNATELY SUBJECTED, IN AN ACIDIC ELECTROLYTE CONTAINING METALLIC SALTS, TO A DIRECT CURRENT ELECTROLYSIS FROM 0.2 A./DM.2 TO 2 A./DM.2 AND AN ALTERNATING CURRENT ELECTROLYSIS FROM ABOUT 1 V. TO ABOUT 5 V.
Inventors
- 👤 S Ueki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:02
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |