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US3663657A
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US
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Emulsion-suspension graft copolymerization process
Assignee: BP Chemicals Ltd
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Filing: 1970-05-14
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Granted: 1972-05-16
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Expires: 1990-05-14
Abstract
Abstract PROCESS COMPRISING MIXING A SATURATED POLYMER IN LATEX FORM WITH VINYL CHLORIDE, DESTROYING THE LATEX EMULSIFYING AGENT SO THAT THE POLYMER PARTICLE PASS INTO THE VINYL CHLORIDE AND POLYMERSING THE LATTER, PREFERABLY UNDER SUSPENSION POLYMERISATION CONDITIONS.
Inventors
- 👤 Alan Charles Sturt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
C; C08; C08F; C08F291/00; C08F259/00; C08F259/02; C08F259/04; Y; Y10; Y10S; Y10S525/00; Y10S525/915; Y10S526/00; Y10S526/909; Y10S526/911
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |