US3287336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chlorinating vinyl chloride polymers with an oxygen catalyst
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-10-15
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Granted: 1966-11-22
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Taylor John Heyward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:35
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR THE MANUFACTURE OF CHLORINATED VINYL CHLORIDE POLYMERS SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE HOMOPOLYMERS AND VINYL CHLORIDE/VINYL ACETATE COPOLYMERS CONTAIING AT LEAST 70% BY WEIGHT VINYL CHLORIDE, WHICH COMPRISES INTRODUCING CHLORINE GAS INTO AN AQUEOUS DISPERSON OF SAID VINNYL CHLORIDE POLYMER IN THE PRESENCE OF AN OXYGEN CATALYST CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF MOLECULAR OXYGEN, HYDROGEN PEROXIDE, A LOWER ALKYL HYDROPEROXIDE AND A DI-LOWER ALKYL PEROXIDE AND AT A CHLORINATION TEMPERATURE OF 54 TO 85*C.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE MANUFACTURE OF CHLORINATED VINYL CHLORIDE POLYMERS SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE HOMOPOLYMERS AND VINYL CHLORIDE/VINYL ACETATE COPOLYMERS CONTAIING AT LEAST 70% BY WEIGHT VINYL CHLORIDE, WHICH COMPRISES INTRODUCING CHLORINE GAS INTO AN AQUEOUS DISPERSON OF SAID VINNYL CHLORIDE POLYMER IN THE PRESENCE OF AN OXYGEN CATALYST CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF MOLECULAR OXYGEN, HYDROGEN PEROXIDE, A LOWER ALKYL HYDROPEROXIDE AND A DI-LOWER ALKYL PEROXIDE AND AT A CHLORINATION TEMPERATURE OF 54 TO 85*C.
References Cited (Backward Citations)
US2503252A
Cited
US2980656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |