Patent US2839509A successfully refreshed from Google Patents.
US2839509A
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Vinyl chloride-dialkyl maleate copolymerization process
Assignee: Uniroyal Inc
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Filing: 1955-04-28
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Granted: 1958-06-17
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Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Harold K Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:32
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF MAKING A THERMOPLASTIC, RESINOUSUS BINARY COPOLYMER OF VINYL CHLORIDE AND A DIALKYL MALEATE HAVING AT LEAST EIGHT CARBON ATOMS IN EACH ALKYL GROUP, WHICH COMPRISES FORMING A HOMOGENEOUS, WATER-IMMISCIBEL SOLUTION OF THE MONOMERIC DIALKYL MALTEATE AND AN OILSOLUBLE CATALYST OF FREE RADICAL POLYMERIZATION, SEPARATELY FORMING A HOMOGENEOUS AQUEOUS SOLUTION OF WATER-SOLUBLE SUSPESION AGENT AND WATER, DISPERSING SAID FIRST-NAMED SOLUTUON IN SAID SECOND-NAMED SOLUTION TO FORM A SUSPENSION OF DROPLETS OF WATER-IMMERSIBLE PHASE, ALL OF WHICH DROPLETS ARE HOMOGENEOUS AND OF IDENTICAL COMPOSITION, IN THE HOMOGENEOUS AQEOUS PHASE, INCORPORATING AT LEAST A PART OF THE MONOMERIC VINYL CHLORIDE IN THE SUSPENSION PRIOR TO INITATTION OF THE POLYMERIZATION STEP SUBJECTING THE SUSPENSION TO SUSPENSION POLYMERIZATION, THE MONOMERS SUBJECTED TO SUSPENSION POLYMEIZATION CONTAINING FROM 55% TO 98% OF VINYL CHLORIDE AND FROM 2% TO 45% OF DIALKYL MALEATE, AND RECOVERING FROM THE RESULTING MIXTURE, A BINARY COPOPLYMER FO SAID VINYL CHLORIDE AND SAID DIALKYL MALEATE.
Claim 2
Independent Claim
155 words
THE METHOD OF MAKING A THERMOPLASTIC, RESINOUSUS BINARY COPOLYMER OF VINYL CHLORIDE AND A DIALKYL MALEATE HAVING AT LEAST EIGHT CARBON ATOMS IN EACH ALKYL GROUP, WHICH COMPRISES FORMING A HOMOGENEOUS, WATER-IMMISCIBEL SOLUTION OF THE MONOMERIC DIALKYL MALTEATE AND AN OILSOLUBLE CATALYST OF FREE RADICAL POLYMERIZATION, SEPARATELY FORMING A HOMOGENEOUS AQUEOUS SOLUTION OF WATER-SOLUBLE SUSPESION AGENT AND WATER, DISPERSING SAID FIRST-NAMED SOLUTUON IN SAID SECOND-NAMED SOLUTION TO FORM A SUSPENSION OF DROPLETS OF WATER-IMMERSIBLE PHASE, ALL OF WHICH DROPLETS ARE HOMOGENEOUS AND OF IDENTICAL COMPOSITION, IN THE HOMOGENEOUS AQEOUS PHASE, INCORPORATING AT LEAST A PART OF THE MONOMERIC VINYL CHLORIDE IN THE SUSPENSION PRIOR TO INITATTION OF THE POLYMERIZATION STEP SUBJECTING THE SUSPENSION TO SUSPENSION POLYMERIZATION, THE MONOMERS SUBJECTED TO SUSPENSION POLYMEIZATION CONTAINING FROM 55% TO 98% OF VINYL CHLORIDE AND FROM 2% TO 45% OF DIALKYL MALEATE, AND RECOVERING FROM THE RESULTING MIXTURE, A BINARY COPOPLYMER FO SAID VINYL CHLORIDE AND SAID DIALKYL MALEATE.
References Cited (Backward Citations)
US2476474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |