Patent US3140203A successfully refreshed from Google Patents.
US3140203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for treating aluminum and aluminum alloys
Assignee: MacDermid Inc
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Filing: 1961-04-24
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Granted: 1964-07-07
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 John J Grunwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:26
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A DEOXIDIZING SOLUTION FOR ALUMINUM ALLOYS CONTAINING SILICON AS A SIGNIFICANT ALLOYING ELEMENT, WHICH CONSISTS ESSENTIALLY, IN ADDITION TO WATER, OF A SOLUBLE PERSULFATE SELECTED FROM THE GROUP CONSISTING OF PERSULFURIC ACID AND THE AMMONIUM ALKALI AND ALKALINE EARTH METAL SALTS THEREOF IN AMOUNT OF FROM 1.0 GRAM PER LITER TO SATURATION, A SOLUBLE FLUORIDE PROVIDING A FLUORIDE ION CONCENTRATION IN SOLUTION EQUIVALENT TO THAT OBTAINED FROM 0.1 TO 20.0 GRAMS PER LITER OF AMMONIUM FIFLUORIDE, AND A SUPPLEMENTAL ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS, THE ACID SALTS THEREOF, AND NITRIC ACID, IN AMOUNT SUFFICIENT TO PROVIDE A SOLUTION PH NOT OVER 2.0.
Claim 2
Dependent Claim
109 words
A DEOXIDIZING SOLUTION FOR ALUMINUM ALLOYS CONTAINING SILICON AS A SIGNIFICANT ALLOYING ELEMENT, WHICH CONSISTS ESSENTIALLY, IN ADDITION TO WATER, OF A SOLUBLE PERSULFATE SELECTED FROM THE GROUP CONSISTING OF PERSULFURIC ACID AND THE AMMONIUM ALKALI AND ALKALINE EARTH METAL SALTS THEREOF IN AMOUNT OF FROM 1.0 GRAM PER LITER TO SATURATION, A SOLUBLE FLUORIDE PROVIDING A FLUORIDE ION CONCENTRATION IN SOLUTION EQUIVALENT TO THAT OBTAINED FROM 0.1 TO 20.0 GRAMS PER LITER OF AMMONIUM FIFLUORIDE, AND A SUPPLEMENTAL ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS, THE ACID SALTS THEREOF, AND NITRIC ACID, IN AMOUNT SUFFICIENT TO PROVIDE A SOLUTION PH NOT OVER 2.0.
Claim 3
Dependent Claim
110 words
THE PROCESS OF DEOXIDIZING AND DESMUTTING ALUMINUM AND ALUMINUM ALLOY ARTICLES WHICH COMPRISES PROVIDING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY, IN ADDITION TO WATER, OF A SOLUBLE PERSULFATE IN AMOUNT SUFFICIENT TO GIVE A PERSULFATE ION CONCENTRATION EQUIVALENT TO THAT PROVIDED BY FROM 1.0 GRAM PER LITER TO SATURATION OF AMMONIUM PERSULFATE, AND A SUPPLEMENTAL ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS, THE ACID SALTS THEREOF, AND NITRIC ACID, IN AMOUNT SUFFICIENT TO PROVIDE A SOLUTION PH NOT IN EXCESS OF 2.0, TREATING SAID ARTICLES BY IMMERSING THEM IN SAID SOLUTION FOR A PERIOD OF AT LEAST 10 SECONDS AT A TEMPERATURE OF AT LEAST 50*F.
Claim 4
Dependent Claim
110 words
THE PROCESS OF DEOXIDIZING AND DESMUTTING ALUMINUM AND ALUMINUM ALLOY ARTICLES WHICH COMPRISES PROVIDING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY, IN ADDITION TO WATER, OF A SOLUBLE PERSULFATE IN AMOUNT SUFFICIENT TO GIVE A PERSULFATE ION CONCENTRATION EQUIVALENT TO THAT PROVIDED BY FROM 1.0 GRAM PER LITER TO SATURATION OF AMMONIUM PERSULFATE, AND A SUPPLEMENTAL ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS, THE ACID SALTS THEREOF, AND NITRIC ACID, IN AMOUNT SUFFICIENT TO PROVIDE A SOLUTION PH NOT IN EXCESS OF 2.0, TREATING SAID ARTICLES BY IMMERSING THEM IN SAID SOLUTION FOR A PERIOD OF AT LEAST 10 SECONDS AT A TEMPERATURE OF AT LEAST 50*F.
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |