Patent US3067186A successfully refreshed from Google Patents.
US3067186A
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Vinyl chloride polymerisation process
Assignee: Distillers Co Yeast Ltd
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Filing: 1960-05-24
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Granted: 1962-12-04
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Expires: 1980-05-24
Abstract
No abstract record available.
Inventors
- 👤 Bessant Kenneth Henry Charles
- 👤 Matthews Richard John Strachan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:46
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/02; C08F114/04; C08F114/06; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS WHICH COMPRISES POLYMERISING VINYL CHLORIDE AT A TEMPERATURE IN THE RANGE -14*C. TO -60*C. IN THE PRESENCE OF A REDOX POLYMERISATION CATALYST CONSISTING ESSENTIALLY OF METHYL HYDROPEROXIDE, A COMPOUND OF IRON CAPABLE OF PRODUCING FERROUS IONS IN THE REACTION MEDIUM AND ASCORBIC ACID.
Claim 2
Dependent Claim
45 words
A PROCESS WHICH COMPRISES POLYMERISING VINYL CHLORIDE AT A TEMPERATURE IN THE RANGE -14*C. TO -60*C. IN THE PRESENCE OF A REDOX POLYMERISATION CATALYST CONSISTING ESSENTIALLY OF METHYL HYDROPEROXIDE, A COMPOUND OF IRON CAPABLE OF PRODUCING FERROUS IONS IN THE REACTION MEDIUM AND ASCORBIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |