Patent US2828193A successfully refreshed from Google Patents.
US2828193A
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Method for rejuvenation of aluminum treating solutions
Assignee: Turco Products Inc
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Filing: 1954-08-09
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Granted: 1958-03-25
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Newman Kenneth Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:39
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C23G1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A METHOD FOR TREATING ALUMINUM OBJECTS HAVING A SURFACE LAYER OF METAL COMPOUNDS THEREON TO REMOVE SAID COMPOUNDS, WHEREIN SAID COMPOUNDS ARE REMOVED BY CONTACTING SAID SURFACE LAYER WITH AN AQUEOUS ACIDIC SOLUTION CONTAINING FLUORIDE IONS, SAID SOLUTION BEING ADAPTED TO REACT WITH AND DISSOLVE SAID LAYER WITHOUT APPRECIABLY CORRODING THE ALUMINUM OBJECTS; THE IMPROVEMENT OF REVIVIFYING SAID SOLUTION, AFTER TREATMENT AND REMOVAL OF SAID ALUMINUM OBJECTS FROM THE BATH, BY INCREASING THE FREE FLUORIDE CONCENTRATION THEREOF ABOVE THAT EXISTING DURING THE METAL COMPOUND DISSOLVING PROCEDURE TO A CONCENTRATION CORROSIVE TO ALUMINUM OBJECTS BY ADDING SAID SOLUTION A FREE FLUORIDE ION YIELDING COMPOUND IN AN AMOUNT SUBSTANTIALLY EQUAL TO THE AMOUNT OF SAID COMPOUND STOICHIMETRICALLY EQUIVALENT TO THE DISSOLVED METAL IONS PRESENT IN THE SOLUTION, TO PRECIPITATE SUBSTANTIALLY ALL THE DISSOLVED METAL IONS FROM SAID SOLUTION IN COMBINATION WITH THE ADDITIONAL FLORIDE IONS.
Claim 2
Dependent Claim
144 words
IN A METHOD FOR TREATING ALUMINUM OBJECTS HAVING A SURFACE LAYER OF METAL COMPOUNDS THEREON TO REMOVE SAID COMPOUNDS, WHEREIN SAID COMPOUNDS ARE REMOVED BY CONTACTING SAID SURFACE LAYER WITH AN AQUEOUS ACIDIC SOLUTION CONTAINING FLUORIDE IONS, SAID SOLUTION BEING ADAPTED TO REACT WITH AND DISSOLVE SAID LAYER WITHOUT APPRECIABLY CORRODING THE ALUMINUM OBJECTS; THE IMPROVEMENT OF REVIVIFYING SAID SOLUTION, AFTER TREATMENT AND REMOVAL OF SAID ALUMINUM OBJECTS FROM THE BATH, BY INCREASING THE FREE FLUORIDE CONCENTRATION THEREOF ABOVE THAT EXISTING DURING THE METAL COMPOUND DISSOLVING PROCEDURE TO A CONCENTRATION CORROSIVE TO ALUMINUM OBJECTS BY ADDING SAID SOLUTION A FREE FLUORIDE ION YIELDING COMPOUND IN AN AMOUNT SUBSTANTIALLY EQUAL TO THE AMOUNT OF SAID COMPOUND STOICHIMETRICALLY EQUIVALENT TO THE DISSOLVED METAL IONS PRESENT IN THE SOLUTION, TO PRECIPITATE SUBSTANTIALLY ALL THE DISSOLVED METAL IONS FROM SAID SOLUTION IN COMBINATION WITH THE ADDITIONAL FLORIDE IONS.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |