Patent US3231556A successfully refreshed from Google Patents.
US3231556A
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Short-stop chloroprene polymerization with oxalate ions
Assignee: Distillers Co Yeast Ltd
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Filing: 1962-01-04
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Granted: 1966-01-25
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Expires: 1982-01-04
Abstract
No abstract record available.
Inventors
- 👤 Hutchinson Henry Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:07
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR THE PRODUCTION OF POLYCHLOROPRENE WHICH COMPRISES POLYMERISING CHLOROPRENE IN AQUEOUS EMULSION IN THE PRESENCE OF PERSULPHATE IONS AS SOLE CATALYST COMPONENT AND STOPPING POLYMERISATION WHILE THE REACTION MIXTURE CONTAINS UNPOLYMERISED CHLOROPRENE BY THE ADDITION OF A WATER SOLUBLE OXALATE WHICH IN AQUEOUS SOLUTION PROVIDES OXALATE IONS AS THE SOLE SHORT STOPPING AGENT.
Claim 2
Dependent Claim
55 words
A PROCESS FOR THE PRODUCTION OF POLYCHLOROPRENE WHICH COMPRISES POLYMERISING CHLOROPRENE IN AQUEOUS EMULSION IN THE PRESENCE OF PERSULPHATE IONS AS SOLE CATALYST COMPONENT AND STOPPING POLYMERISATION WHILE THE REACTION MIXTURE CONTAINS UNPOLYMERISED CHLOROPRENE BY THE ADDITION OF A WATER SOLUBLE OXALATE WHICH IN AQUEOUS SOLUTION PROVIDES OXALATE IONS AS THE SOLE SHORT STOPPING AGENT.
References Cited (Backward Citations)
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |