US3146178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodizing electrolyte and method
Assignee: Alcoa Corp
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Filing: 1962-04-12
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Granted: 1964-08-25
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Expires: 1982-04-12
Abstract
No abstract record available.
Inventors
- 👤 William C Cochran
- 👤 William P Kampert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF ANODIZING ALUMINUM, COMPRISING MAKING AN ALUMINUM ARTICLE ANODE IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AT LEAST 25 GRAMS PER LITER OF LIGNOSULFONIC ACID, AT LEAST 3 GRAMS PER LITER AND LESS THAN 13 GRAMS PER LITER OF SULFATE (CALCULATED AS H2SO4) PROVIDED BY AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND WATER SOLUBLE SULFATES AND BISULFATES, AND WATER, FOR A TIME SUFFICIENT TO PRODUCE A COLORED ANODIC OXIDE COATING OF SUBSTANTIAL THICKNESS.
Claim 2
Independent Claim
80 words
A METHOD OF ANODIZING ALUMINUM, COMPRISING MAKING AN ALUMINUM ARTICLE ANODE IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AT LEAST 25 GRAMS PER LITER OF LIGNOSULFONIC ACID, AT LEAST 3 GRAMS PER LITER AND LESS THAN 13 GRAMS PER LITER OF SULFATE (CALCULATED AS H2SO4) PROVIDED BY AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND WATER SOLUBLE SULFATES AND BISULFATES, AND WATER, FOR A TIME SUFFICIENT TO PRODUCE A COLORED ANODIC OXIDE COATING OF SUBSTANTIAL THICKNESS.
References Cited (Backward Citations)
GB636293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |