Patent US2975162A successfully refreshed from Google Patents.
US2975162A
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Process for the production of polymerization products of vinyl chloride
Assignee: Chemische Werke Buna VEB
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Filing: 1957-06-20
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Granted: 1961-03-14
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Iloff Arnd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:59
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE PROCESS FOR THE PRODUCTION OF POLYMERIZATION PRODUCTS OF VINYL CHLORIDE, WHEREIN AN AQUEOUS SUSPENSION OF MONOMERIC VINYL CHLORIDE IN THE WEIGHT RELATIONSHIP OF ABOUT 1:1 IS POLYMERIZED IN THE TEMPERATURE RANGE OF ABOUT 40-50*C. IN THE PRESENCE OF ABOUT 0.1%-1% BY WHICH BASED ON THE AQUEOUS PHASE OF THE SUSPENSION, OF A SUSPENSION STABILIZER BEING THE SODIUM SALT OF A MIXED POLYMERIZATION PRODUCT OF STYRENE AND MALEIC ACID ANHYDRIDE AND ABOUT 0.05 PERCENT OF ACETYL CYCLOHEXANE SULFONYL PEROXIDE CALCULATED ON THE MONOMER.
Claim 2
Dependent Claim
83 words
THE PROCESS FOR THE PRODUCTION OF POLYMERIZATION PRODUCTS OF VINYL CHLORIDE, WHEREIN AN AQUEOUS SUSPENSION OF MONOMERIC VINYL CHLORIDE IN THE WEIGHT RELATIONSHIP OF ABOUT 1:1 IS POLYMERIZED IN THE TEMPERATURE RANGE OF ABOUT 40-50*C. IN THE PRESENCE OF ABOUT 0.1%-1% BY WHICH BASED ON THE AQUEOUS PHASE OF THE SUSPENSION, OF A SUSPENSION STABILIZER BEING THE SODIUM SALT OF A MIXED POLYMERIZATION PRODUCT OF STYRENE AND MALEIC ACID ANHYDRIDE AND ABOUT 0.05 PERCENT OF ACETYL CYCLOHEXANE SULFONYL PEROXIDE CALCULATED ON THE MONOMER.
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) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |