Patent US3793259A successfully refreshed from Google Patents.
US3793259A
Expired / Lapsed
US
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Continuous bulk polymerization of vinyl chloride
Assignee: Huels AG
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Filing: 1972-08-18
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Granted: 1974-02-19
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Expires: 1992-08-18
Abstract
Abstract A PROCESS FOR THE CONTINUOUS BULK POLYMERIZATION OF VINYL CHLORIDE WHICH COMPRISES POLYMERIZING VINYL CHLORIDE IN A POLYMERIZATION REACTOR EMPLOYING AN OIL-SOLUBLE DFREE RADICAL CATALYST AT AN ELEVATED POLYMERIZATION TEMPERATURE WHILE MAINTAINING THE TEMPERATURE OF POLYMERIZATION REACTOR SURFACES CONTACTED BY SAID VINYL CHLORIDE AND SAID CATALYST BELOW ABOUT 0*C, CLOGGING OF POLYMERIZATION APPARATUS IS THEREBY ELIMINTATED OR GREATLY REDUCED.
Inventors
- 👤 H Brinkmann
- 👤 J Dietrich
- 👤 G Beckmann
- 👤 Guionneau J Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:03
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |