US3265597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodizing process and electrolyte
Assignee: Vereinigte Aluminium Werke AG
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Filing: 1963-06-04
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Granted: 1966-08-09
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Expires: 1983-06-04
Abstract
No abstract record available.
Inventors
- 👤 Neunzig Heinrich
- 👤 Rohrig Veit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:32
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF PRODUCING A COLORED OXIDE LAYER ON A SURFACE OF A BODY FORMED OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, COMPRISING THE STEP OF SUBJECTING SAID BODY TO ANODIC OXIDATION IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND WATER-SOLUBLE METAL SULFATES, SAID SUBSTANCE BEING PRESENT IN AN AMOUNT EQUIVALENT TO BETWEEN 0.1% AND 1% BY WEIGHT OF SULFURID ACID, BETWEEN 1% AND 5% BY WEIGHT OF SULFOSALICYLIC ACID, AND BETWEEN 0.5% AND 1.5% BY WEIGHT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ACID ANHYDRIDE.
Claim 2
Independent Claim
113 words
A METHOD OF PRODUCING A COLORED OXIDE LAYER ON A SURFACE OF A BODY FORMED OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, COMPRISING THE STEP OF SUBJECTING SAID BODY TO ANODIC OXIDATION IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND WATER-SOLUBLE METAL SULFATES, SAID SUBSTANCE BEING PRESENT IN AN AMOUNT EQUIVALENT TO BETWEEN 0.1% AND 1% BY WEIGHT OF SULFURID ACID, BETWEEN 1% AND 5% BY WEIGHT OF SULFOSALICYLIC ACID, AND BETWEEN 0.5% AND 1.5% BY WEIGHT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ACID ANHYDRIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |