US3018211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process for brightening aluminum and its alloys
Assignee: Purex Corp Ltd
•
Filing: 1959-01-26
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Granted: 1962-01-23
•
Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward M Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A CHEMICAL BRIGHTENER BATH FOR ALUMINUM, WHICH COMPRISES AN ACID AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT .60 TO ABOUT 2.00 MOLS PER LITER OF HYDROGEN IONS, ABOUT .60 TO ABOUT 3.00 MOLS PER LITER OF NITRATE IONS, A CONCENTRATION OF HEXAVALENT CHROMIUM-CONTAINING ION EQUIVALENT TO ABOUT .05 TO ABOUT 0.40 MOL PER LITER OF HEXAVALENT CHROMIUM, ABOUT .01 TO ABOUT .10 MOL PER LITER OF COMPLEX FLUORIDE IONS SELECTED FROM THE GROUP CONSISTING OF THE SIF6, TIF6, ZRF6, BF4 AND ALF4 IONS, AND ABOUT .02 TO ABOUT .20 MOL PER LITER OF ALUMINUM CATIONS, THE PH OF SAID SOLUTION BEING NOT GREATER THAN ABOUT 0.5.
Claim 2
Dependent Claim
105 words
A CHEMICAL BRIGHTENER BATH FOR ALUMINUM, WHICH COMPRISES AN ACID AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT .60 TO ABOUT 2.00 MOLS PER LITER OF HYDROGEN IONS, ABOUT .60 TO ABOUT 3.00 MOLS PER LITER OF NITRATE IONS, A CONCENTRATION OF HEXAVALENT CHROMIUM-CONTAINING ION EQUIVALENT TO ABOUT .05 TO ABOUT 0.40 MOL PER LITER OF HEXAVALENT CHROMIUM, ABOUT .01 TO ABOUT .10 MOL PER LITER OF COMPLEX FLUORIDE IONS SELECTED FROM THE GROUP CONSISTING OF THE SIF6, TIF6, ZRF6, BF4 AND ALF4 IONS, AND ABOUT .02 TO ABOUT .20 MOL PER LITER OF ALUMINUM CATIONS, THE PH OF SAID SOLUTION BEING NOT GREATER THAN ABOUT 0.5.
Claim 3
Dependent Claim
109 words
A PROCESS FOR CHEMICALLY BRIGHTENING ALUMINUM. WHICH COMPRISES TREATING SAID ALUMINUM IN AN AQUEOUS ACID SOLUTION CONSISTING ESSENTIALLY OF ABOUT .60 TO ABOUT 2.00 MOLS PER LITER OF HYDROGEN IONS, ABOUT .60 TO ABOUT 3.00 MOLS PER LITER OF NITRATE IONS, A CONCENTRATION OF HEXAVALENT CHROMIUM-CONTAINING ION EQUIVALENT TO ABOUT .05 TO ABOUT 0.40 MOL PER LITER OF HEXAVALENT CHROMIUM, ABOUT .01 TO ABOUT .10 MOL PER LITER OF COMPLEX FLUORIDE IONS SELECTED FROM THE GROUP CONSISTING OF THE SIF6, TIF6, ZRF6, BF4 AND ALF4 IONS, AND ABOUT .02 TO ABOUT .20 MOL PER LITER OF ALUMINUM CATIONS, THE PH OF SAID SOLUTION BEING NOT GREATER THAN ABOUT 0.5.
Claim 4
Dependent Claim
109 words
A PROCESS FOR CHEMICALLY BRIGHTENING ALUMINUM. WHICH COMPRISES TREATING SAID ALUMINUM IN AN AQUEOUS ACID SOLUTION CONSISTING ESSENTIALLY OF ABOUT .60 TO ABOUT 2.00 MOLS PER LITER OF HYDROGEN IONS, ABOUT .60 TO ABOUT 3.00 MOLS PER LITER OF NITRATE IONS, A CONCENTRATION OF HEXAVALENT CHROMIUM-CONTAINING ION EQUIVALENT TO ABOUT .05 TO ABOUT 0.40 MOL PER LITER OF HEXAVALENT CHROMIUM, ABOUT .01 TO ABOUT .10 MOL PER LITER OF COMPLEX FLUORIDE IONS SELECTED FROM THE GROUP CONSISTING OF THE SIF6, TIF6, ZRF6, BF4 AND ALF4 IONS, AND ABOUT .02 TO ABOUT .20 MOL PER LITER OF ALUMINUM CATIONS, THE PH OF SAID SOLUTION BEING NOT GREATER THAN ABOUT 0.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |