US3637622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of vinyl chloride
Assignee: CHATILLON ITALIANA FIBRE
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Filing: 1970-07-22
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Granted: 1972-01-25
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Expires: 1990-07-22
Abstract
Abstract A PROCESS IS DISCLOSED FOR THE LOW TEMPERATURE BULK POLYMERIZATION OF VINYL CHLORIDE BY USING, AS CATALYST,A CATALYTIC SYSTEM CONSISTING ESSENIALLY OF AN ORGANIC HYDROPEROXIDE AND AN AMMONIUM SALT OF THE GENERAL FORMULA: R''-O-SO-O-X WHEREIN R'' IS AN ALKYL, CYCLO-ALKYL, ARYL OR ARYL-ALKYL RADICAL HAVING FROM 1 TO 12 CARBON ATOMS, AND X IS A RADICAL CONTAINING QUATERNARY NITROGEN PREFERABLY R'' IS AN ALKYL RADICAL HAVING FROM 1 TO 4 CARBON ATOMS, AND X IS NH4 OR NR4",R" BEING AN ALKYL RADICAL HAVING FROM 1 TO 4 CARBON ATOMS.
Inventors
- 👤 Sergio Lo Monaco
- 👤 Corrado Mazzolini
- 👤 Luigi Patron
- 👤 Alberto Moretti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |