US2927911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for copolymerizing acrylic compounds with acid sensitive monomer
Assignee: Dow Chemical Co
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Filing: 1955-03-07
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Granted: 1960-03-08
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 John L Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:57
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE METHOD WHICH COMPRISES PROVIDING AN AQUEOUS DISPERSION OF AN ACRYLIC COMPOUND FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND THE AMIDES OF SUCH ACIDS, ADJUSTING THE PH OF THE AQUEOUS DISPERSION TO THE RANGE FROM 7 TO 14, ADDING TO THE RESULTING AQUEOUS SOLUTION FROM 50 TO 10 PARTS BY WEIGHT, FOR EACH 50 TO 90 PARTS, RESPECTIVELY, OF THE ACRYLIC COMPOUND, OF A MEMBER OF THE GROUP CONSISTING OF VINYL ALKYL ETHERS, VINYL MONOHALOALKYL ETHERS, VINYL METHOXYALKYL ETHERS, AND ALLY ALCOHOL, AND FROM 0.5 TO 10 PERCENT, BASED ON THE COMBINED WEIGHT OF UNSATURATED COMPOUNDS, OF A WATER-SOLUBLE INORGANIC SALT FROM THE GROUP CONSISTING OF SULFITES, BISULFITES, METABISULFITES AND THIOSULFATES, AND SUBJECTING THE RESULTING MIXTURE TO POLYMERIZING CONDITIONS IN CONTACT WITH A CATALYTIC AMOUNT OF A WATER-SOLUBLE PERSULFATE UNTIL POLYMERIZATION IS SUBSTANTIALLY COMPLETE.
Claim 2
Independent Claim
137 words
THE METHOD WHICH COMPRISES PROVIDING AN AQUEOUS DISPERSION OF AN ACRYLIC COMPOUND FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND THE AMIDES OF SUCH ACIDS, ADJUSTING THE PH OF THE AQUEOUS DISPERSION TO THE RANGE FROM 7 TO 14, ADDING TO THE RESULTING AQUEOUS SOLUTION FROM 50 TO 10 PARTS BY WEIGHT, FOR EACH 50 TO 90 PARTS, RESPECTIVELY, OF THE ACRYLIC COMPOUND, OF A MEMBER OF THE GROUP CONSISTING OF VINYL ALKYL ETHERS, VINYL MONOHALOALKYL ETHERS, VINYL METHOXYALKYL ETHERS, AND ALLY ALCOHOL, AND FROM 0.5 TO 10 PERCENT, BASED ON THE COMBINED WEIGHT OF UNSATURATED COMPOUNDS, OF A WATER-SOLUBLE INORGANIC SALT FROM THE GROUP CONSISTING OF SULFITES, BISULFITES, METABISULFITES AND THIOSULFATES, AND SUBJECTING THE RESULTING MIXTURE TO POLYMERIZING CONDITIONS IN CONTACT WITH A CATALYTIC AMOUNT OF A WATER-SOLUBLE PERSULFATE UNTIL POLYMERIZATION IS SUBSTANTIALLY COMPLETE.
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) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |