Patent US3143485A successfully refreshed from Google Patents.
US3143485A
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Aluminum anodizing
Assignee: Alcoa Corp
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Filing: 1961-11-28
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Granted: 1964-08-04
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 William P Kampert
- 👤 Joseph H Manhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:15
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF ANODIZING ALUMINUM, COMPRISING MAKING AN ALUMINUM ARTICLE ANODE IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AT LEAST 10 GRAMS PER LITER OF 4-SULFORESORCINOL, AT LEAST 1 GRAM PER LITER AND LESS THAN 15 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, THE WEIGHT RATION (R) OF 4-SULFORESORCINOL TO SULFATE (CALCULATED AT H2SO4) BIENG AT LEAST THAT EXPRESSED BY THE FORMULA: R=4.5+S/20, WHERE S IS THE NUMBER OF GRAMS PER LITER OF 4-SULFORESORCINOL IN THE ELECTROLYTE, FOR A TIME SUFFICIENT TO PRODUCE A COLORED ANODIC OXIDE CATING AT LEAST 0.1 MIL THICK.
Claim 2
Independent Claim
115 words
A METHOD OF ANODIZING ALUMINUM, COMPRISING MAKING AN ALUMINUM ARTICLE ANODE IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AT LEAST 10 GRAMS PER LITER OF 4-SULFORESORCINOL, AT LEAST 1 GRAM PER LITER AND LESS THAN 15 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, THE WEIGHT RATION (R) OF 4-SULFORESORCINOL TO SULFATE (CALCULATED AT H2SO4) BIENG AT LEAST THAT EXPRESSED BY THE FORMULA: R=4.5+S/20, WHERE S IS THE NUMBER OF GRAMS PER LITER OF 4-SULFORESORCINOL IN THE ELECTROLYTE, FOR A TIME SUFFICIENT TO PRODUCE A COLORED ANODIC OXIDE CATING AT LEAST 0.1 MIL THICK.
References Cited (Backward Citations)
US2233785A
Cited
US3031387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |