Patent US3066121A successfully refreshed from Google Patents.
US3066121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of polyvinyl esters
Assignee: STANDARD OIL Co OF CHICAG
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Filing: 1959-07-03
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Granted: 1962-11-27
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Expires: 1979-07-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Martin
- 👤 Joseph F Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
IN A PROCESS FOR THE ALKALINE-CATALYZED HYDROLYSIS OF A POLYVINYL ESTER WITH A LOWER ALKANOL HAVING FROM ONE TO FOUR CARBON ATOMS PER MOLECULE, THE IMPROVED PROCEDURE WHICH COMPRISES: COMMINGLING THE POLYVINYL ESTER, AN EXCESS OF THE ALKANOL, AND A PREDETERMINED AMOUNT OF ALKALINE HYDROLYSIS CATALYST TO FORM A FLUID REACTION MIXTURE, EFFECTING A PORTION OF THE HYDROLYSIS REACTION IN THE FLUID STATE IN THE SUBSTANTIAL ABSENCE OF WATER UNTIL THE RESULTANT POLYVINYL ALCOHOL BEGINS TO FORM A GEL WITH THE EXCESS ALKANOL, INTRODUCING WATER INTO THE REACTION MIXTURE SUBSTANTIALLY SIMULTANEOUSLY WITH THE ONSET OF SAID GEL FORMATION TO DISRUPT THE GEL AND RETURN THE REACTION MIXTURE TO THE FLUID STATE, AND EFFECTING ADDITIONAL HYDROLYSIS REACTION AND CONTROLLED DESTRUCTION OF THE CATALYST WITH SAID WATER IN THE REACTION MIXTURE.
Claim 2
Dependent Claim
129 words
IN A PROCESS FOR THE ALKALINE-CATALYZED HYDROLYSIS OF A POLYVINYL ESTER WITH A LOWER ALKANOL HAVING FROM ONE TO FOUR CARBON ATOMS PER MOLECULE, THE IMPROVED PROCEDURE WHICH COMPRISES: COMMINGLING THE POLYVINYL ESTER, AN EXCESS OF THE ALKANOL, AND A PREDETERMINED AMOUNT OF ALKALINE HYDROLYSIS CATALYST TO FORM A FLUID REACTION MIXTURE, EFFECTING A PORTION OF THE HYDROLYSIS REACTION IN THE FLUID STATE IN THE SUBSTANTIAL ABSENCE OF WATER UNTIL THE RESULTANT POLYVINYL ALCOHOL BEGINS TO FORM A GEL WITH THE EXCESS ALKANOL, INTRODUCING WATER INTO THE REACTION MIXTURE SUBSTANTIALLY SIMULTANEOUSLY WITH THE ONSET OF SAID GEL FORMATION TO DISRUPT THE GEL AND RETURN THE REACTION MIXTURE TO THE FLUID STATE, AND EFFECTING ADDITIONAL HYDROLYSIS REACTION AND CONTROLLED DESTRUCTION OF THE CATALYST WITH SAID WATER IN THE REACTION MIXTURE.
Claim 3
Dependent Claim
183 words
IN A PROCESS FOR HYDROLYZING POLYVINYL ACETATE WITH A LOWER ALKANOL HAVING FROM ONE TO FOUR CARBON ATOMS PER MOLECULE, THE IMPROVED PROCEDURE WHICH COMPRISES: COMMINGLING THE POLYVINYL ACETATE WITH AN EXCESS OF THE ALKANOL AND A PREDETERMINED AMOUNT IN THE RANGE OF FROM 0.001 TO 0.3 PART BY WEIGHT PER PART OF POLYVINYL ACETATE OF A WEAKLY BASIC ALCOHOL-SOLUBLE HYDROLYSIS CATALYST TO FORM A FLUID REACTION MIXTURE, EFFECTING A PORTION OF THE HYDROLYSIS REACTION TO PROCEED AT A SUITABLE TEMPERATURE IN THE RANGE OF ABOUT 10 TO 60*C. WITH NOT MORE THAN ABOUT ONE WEIGHT PERCENT, BASED ON TOTAL REACTANTS, OF WATER UNTIL THE RESULTANT POLYVINYL ALCOHOL BEGINS TO FORM A GEL WITH THE EXCESS ALKANOL, INTRODUCTING FROM 0.1 TO 15 PARTS OF WATER PER PART OF POLYVINYL ACETATE INTO THE REACTION MIXTURE SUBSTANTIALLY SIMULTANEOUSLY WITH THE ONSET OF SAID GEL FORMATION TO DISRUPT THE GEL AND RETURN THE REACTION MIXTURE TO THE FLUID STATE, AND EFFECTING ADDITIONAL HYDROLYSIS REACTION AND CONTROLLED DESTRUCTION OF THE CATALYST WHILE SAID WATER IS IN SAID REACTION MIXTURE UNTIL THE DESIRED DEGREE OF HYDROLYSIS IS OBTAINED.
Claim 4
Dependent Claim
183 words
IN A PROCESS FOR HYDROLYZING POLYVINYL ACETATE WITH A LOWER ALKANOL HAVING FROM ONE TO FOUR CARBON ATOMS PER MOLECULE, THE IMPROVED PROCEDURE WHICH COMPRISES: COMMINGLING THE POLYVINYL ACETATE WITH AN EXCESS OF THE ALKANOL AND A PREDETERMINED AMOUNT IN THE RANGE OF FROM 0.001 TO 0.3 PART BY WEIGHT PER PART OF POLYVINYL ACETATE OF A WEAKLY BASIC ALCOHOL-SOLUBLE HYDROLYSIS CATALYST TO FORM A FLUID REACTION MIXTURE, EFFECTING A PORTION OF THE HYDROLYSIS REACTION TO PROCEED AT A SUITABLE TEMPERATURE IN THE RANGE OF ABOUT 10 TO 60*C. WITH NOT MORE THAN ABOUT ONE WEIGHT PERCENT, BASED ON TOTAL REACTANTS, OF WATER UNTIL THE RESULTANT POLYVINYL ALCOHOL BEGINS TO FORM A GEL WITH THE EXCESS ALKANOL, INTRODUCTING FROM 0.1 TO 15 PARTS OF WATER PER PART OF POLYVINYL ACETATE INTO THE REACTION MIXTURE SUBSTANTIALLY SIMULTANEOUSLY WITH THE ONSET OF SAID GEL FORMATION TO DISRUPT THE GEL AND RETURN THE REACTION MIXTURE TO THE FLUID STATE, AND EFFECTING ADDITIONAL HYDROLYSIS REACTION AND CONTROLLED DESTRUCTION OF THE CATALYST WHILE SAID WATER IS IN SAID REACTION MIXTURE UNTIL THE DESIRED DEGREE OF HYDROLYSIS IS OBTAINED.
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) | 1965-11-26 | 1966-05-28 | 1966-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-26 | 1970-05-28 | 1970-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-26 | 1974-05-28 | 1974-11-27 | $7700.00 | Window Closed / Lapsed |