US3423298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coloring aluminum
Assignee: Olin Corp
•
Filing: 1966-07-05
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Granted: 1969-01-21
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Christian E Michelson
- 👤 James F Murphy
- 👤 David C Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:08
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR COLORING ALUMINUM ELECTROLYTICALLY WHICH COMPRISES ANODICALLY OXIDIZING SAID ALUMINUM AT A CURRENT DENSITY OF FROM 10 TO 100 AMPS PER SQUARE FOOT AND A VOLTAGE OF FROM 10 TO 90 VOLTS IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF FROM 0.2 TO 2% SULFURIC ACID, FROM 3% TO SATURATION OF SULFAMIC ACID, AND FROM 0.5% TO 5% OF A LOWER ALIPHATIC DIBASIC ACID, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF FROM 15 TO 30*C.
Claim 2
Dependent Claim
77 words
A PROCESS FOR COLORING ALUMINUM ELECTROLYTICALLY WHICH COMPRISES ANODICALLY OXIDIZING SAID ALUMINUM AT A CURRENT DENSITY OF FROM 10 TO 100 AMPS PER SQUARE FOOT AND A VOLTAGE OF FROM 10 TO 90 VOLTS IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF FROM 0.2 TO 2% SULFURIC ACID, FROM 3% TO SATURATION OF SULFAMIC ACID, AND FROM 0.5% TO 5% OF A LOWER ALIPHATIC DIBASIC ACID, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF FROM 15 TO 30*C.
References Cited (Backward Citations)
US2855351A
Cited
US3020219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |