US3767637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing polyvinyl chloride containing polymers
Assignee: Lonza AG
•
Filing: 1971-10-15
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Granted: 1973-10-23
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Expires: 1991-10-15
Abstract
Abstract PROCESS OF PRODUCING POLYVINYL CHLORIDE-CONTAINING POLYMERS OF POROUS GRAIN STRUCTURE, WHERE VINYL CHLORIDE MONOMER OR VINYL CHLORIDE MONOMER IN ADMIXTURE WITH OTHER ETHYLENICALLY UNSATURATED MONOMERS IS SUSPENSION POLYMERIZED IN THE PRESENCE OF AN EMULSIFIER. IN ACCORDANCE WITH THE INVENTION, THE EMULSIFIER IS OF ORGANOPHILIC NATURE AND IS A METAL SALT OF A FATTY ALCOHOL POLYGLYCOL ETHER CARBOXYLIC ACID OF THE FORMULA ME-(OOCCH2O(CH2CH2O)X(CH2)NCH3)M WHEREIN ME IS AT LEAST ONE OF THE METALS MG, CA, BA, CD, ZN, AL, PB OR SN; M, IN DEPENDENCE ON THE VALENCE OF THE METAL, STANDS FOR 2, 3 OR 4; X IS A NUMBER OF FROM 0 TO 20 AND N IS A NUMBER OF FROM 6 TO 20.
Inventors
- 👤 R Egli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 0
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |