US2719079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for treating aluminum and aluminum alloys
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1953-04-20
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Granted: 1955-09-27
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Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 James F Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:04
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A COMPOSITION FOR THE CHEMICAL BRIGHTENING OF ALUMINUM AND ALUMINUM ALLOYS COMPRISING AN AQUEOUS ACID SOLUTION CONTAINING COMPLEX FLUORIDE IONS IN CONCENTRATIONS EQUIVALENT IN FLUORIDE TO THE CONCENTRATIONS OF FLUOBORIC ACID AND NITRIC ACID IN CONCENTRATIONS EQUIVALENT TO THE NITRIC ACID INCLUDED IN THE AREA DEFINED IN THE ACCOMPANYING DIAGRAM BY THE SOLID LINES IJ, JK, KL, LM, MN, NO, OP, PQ AND QI, AND ALSO CONTAINING NOT SUBSTANTIALLY LESS THAN ABOUT 0.001 GRAM PER LITER OF COPPER.
Claim 2
Dependent Claim
78 words
A COMPOSITION FOR THE CHEMICAL BRIGHTENING OF ALUMINUM AND ALUMINUM ALLOYS COMPRISING AN AQUEOUS ACID SOLUTION CONTAINING COMPLEX FLUORIDE IONS IN CONCENTRATIONS EQUIVALENT IN FLUORIDE TO THE CONCENTRATIONS OF FLUOBORIC ACID AND NITRIC ACID IN CONCENTRATIONS EQUIVALENT TO THE NITRIC ACID INCLUDED IN THE AREA DEFINED IN THE ACCOMPANYING DIAGRAM BY THE SOLID LINES IJ, JK, KL, LM, MN, NO, OP, PQ AND QI, AND ALSO CONTAINING NOT SUBSTANTIALLY LESS THAN ABOUT 0.001 GRAM PER LITER OF COPPER.
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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |