Patent US3138485A successfully refreshed from Google Patents.
US3138485A
Expired / Lapsed
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Composition and process for treating aluminum
Assignee: Purex Corp Ltd
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Filing: 1961-10-19
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Granted: 1964-06-23
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick S Kaveggia
- 👤 Robert B Roessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:11
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A COMPOSITION WHICH CONSISTS ESSENTIALLY OF ABOUT 60 TO ABOUT 90% OF A SULFATE OF THE GROUP CONSISTING OF ALUMINUM SULFATE, MAGNESIUM SULFATE, VANADYL SULFATE AND URANYL SULFATE, ABOUT 8 TO ABOUT 40% OF CHROMIC ACID AND ABOUT 1/2 TO ABOUT 2% OF A FLUORIDE OF THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM TITRANIUM FLUORIDES AND ZIRCONIUM FLUORIDES.
Claim 2
Dependent Claim
59 words
A COMPOSITION WHICH CONSISTS ESSENTIALLY OF ABOUT 60 TO ABOUT 90% OF A SULFATE OF THE GROUP CONSISTING OF ALUMINUM SULFATE, MAGNESIUM SULFATE, VANADYL SULFATE AND URANYL SULFATE, ABOUT 8 TO ABOUT 40% OF CHROMIC ACID AND ABOUT 1/2 TO ABOUT 2% OF A FLUORIDE OF THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM TITRANIUM FLUORIDES AND ZIRCONIUM FLUORIDES.
Claim 3
Independent Claim
110 words
A METHOD OF DEOXIDIZING AN OBJECT OF ALUMINUM FOR REMOVAL OF ALUMINUM OXIDE FROM SAID OBJECT SUBSTANTIALLY WITHOUT REMOVAL OF BASE METAL FROM SAID OBJECT, WHICH COMPRISES TREATING SAID OBJECT WITH AN AQUEOUS ACIDIC SOLUTION, SAID SOLUTION HAVING A PH IN THE RANGE OF ABOUT 0.5 TO ABOUT 2, AND CONSISTING ESSENTIALLY OF ABOUT 3 TO ABOUT 13% OF A SULFATE OF THE GROUP CONSISTING OF ALUMINUM SULFATE, MAGNESIUM SULFATE, VANADYL SULFATE AND URANYL SULFATE, ABOUT 0.3 TO ABOUT 3.0% CHROMIC ACID, AND ABOUT 0.02 TO ABOUT 0.30% OF A SALT OF A COMPLEX METAL DOUBLE FLUORIDE, BY WEIGHT OF SAID SOLUTION, THE REMAINDER OF SAID SOLUTION BEING SUBSTANTIALLY WATER.
Claim 4
Independent Claim
110 words
A METHOD OF DEOXIDIZING AN OBJECT OF ALUMINUM FOR REMOVAL OF ALUMINUM OXIDE FROM SAID OBJECT SUBSTANTIALLY WITHOUT REMOVAL OF BASE METAL FROM SAID OBJECT, WHICH COMPRISES TREATING SAID OBJECT WITH AN AQUEOUS ACIDIC SOLUTION, SAID SOLUTION HAVING A PH IN THE RANGE OF ABOUT 0.5 TO ABOUT 2, AND CONSISTING ESSENTIALLY OF ABOUT 3 TO ABOUT 13% OF A SULFATE OF THE GROUP CONSISTING OF ALUMINUM SULFATE, MAGNESIUM SULFATE, VANADYL SULFATE AND URANYL SULFATE, ABOUT 0.3 TO ABOUT 3.0% CHROMIC ACID, AND ABOUT 0.02 TO ABOUT 0.30% OF A SALT OF A COMPLEX METAL DOUBLE FLUORIDE, BY WEIGHT OF SAID SOLUTION, THE REMAINDER OF SAID SOLUTION BEING SUBSTANTIALLY WATER.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |