US2705226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vinyl chloride polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1953-01-05
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Granted: 1955-03-29
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Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Bond Alexander Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:08
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F263/00; C08F263/02; C08F263/04; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE PRODUCTION OF VINYL CHLORIDE POLYMERS THAT COMPOUND EASILY AND READILY WITH PLASTICISERS WHICH COMPRISES DISPERSING VINYL CHLORIDE BY AGITATING THE SAME IN AN AQUEOUS SOLUTION CONTAINING A SALT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL AND AMMONIUM SALTS OF AN AT LEAST PARTIALLY ESTERIFIED POLYVINYL ALCOHOL IN WHICH PART OF THE HYDROXYL GROUPS ARE ESTERIFIED BY ACETIC ACID AND PART ARE ESTERIFIED BY AT LEAST ONE POLYBASIC ACID WHICH CONTAINS TWO CARBOXYL GROUPS, ATTACHED TO ADJACENT CARBON ATOMS, AND NO MORE THAN ONE HYDROXYL GROUP, AND WHICH WHEN UNSATURATED, IS OF CIS FORMATION, AND THEREAFTER POLYMERIZING THE THUS DISPERSED VINYL CHLORIDE.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE PRODUCTION OF VINYL CHLORIDE POLYMERS THAT COMPOUND EASILY AND READILY WITH PLASTICISERS WHICH COMPRISES DISPERSING VINYL CHLORIDE BY AGITATING THE SAME IN AN AQUEOUS SOLUTION CONTAINING A SALT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL AND AMMONIUM SALTS OF AN AT LEAST PARTIALLY ESTERIFIED POLYVINYL ALCOHOL IN WHICH PART OF THE HYDROXYL GROUPS ARE ESTERIFIED BY ACETIC ACID AND PART ARE ESTERIFIED BY AT LEAST ONE POLYBASIC ACID WHICH CONTAINS TWO CARBOXYL GROUPS, ATTACHED TO ADJACENT CARBON ATOMS, AND NO MORE THAN ONE HYDROXYL GROUP, AND WHICH WHEN UNSATURATED, IS OF CIS FORMATION, AND THEREAFTER POLYMERIZING THE THUS DISPERSED VINYL CHLORIDE.
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) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |