Patent US2813136A successfully refreshed from Google Patents.
US2813136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polymers produced by alkali metal catalyzed polymerization
Assignee: Phillips Petroleum Co
•
Filing: 1953-12-18
•
Granted: 1957-11-12
•
Expires: 1973-12-18
Abstract
No abstract record available.
Inventors
- 👤 Clyde W Mcrtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:49
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/02; C08C2/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE SEPARATION OF ALKALI METAL IMPURITIES FROM POLYMER PRODUCT OF AN ALKALI METAL CATALYZED POLYMERIZATION OF A CONJUGATED DIENE BY TREATING THE SAID POLYMER WITH AN AQUEOUS TREATING AGENT, WHEREIN EMULSIFICATION TAKES PLACE TO IMPAIR SEPARATION OF AQUEOUS AND POLYMER PHASES, THEREBY PREVENTING EFFICIENT RECOVERY OF PURIFIED POLYMER, THE IMPROVEMENT COMRPISING INCORPORATING AN EMULSION BREADER INTO POLYMER WHICH IS EMULSIFIED WITH SAID AQUEOUS AGENT, THEREBY PROVIDING FOR EFFICIENT SEPARATION OF PURIFIED POLYMER.
Claim 2
Dependent Claim
73 words
IN THE SEPARATION OF ALKALI METAL IMPURITIES FROM POLYMER PRODUCT OF AN ALKALI METAL CATALYZED POLYMERIZATION OF A CONJUGATED DIENE BY TREATING THE SAID POLYMER WITH AN AQUEOUS TREATING AGENT, WHEREIN EMULSIFICATION TAKES PLACE TO IMPAIR SEPARATION OF AQUEOUS AND POLYMER PHASES, THEREBY PREVENTING EFFICIENT RECOVERY OF PURIFIED POLYMER, THE IMPROVEMENT COMRPISING INCORPORATING AN EMULSION BREADER INTO POLYMER WHICH IS EMULSIFIED WITH SAID AQUEOUS AGENT, THEREBY PROVIDING FOR EFFICIENT SEPARATION OF PURIFIED POLYMER.
References Cited (Backward Citations)
US2679521A
Cited
US2209746A
Cited
US2468330A
Cited
US2543440A
Cited
US2652424A
Cited
US2712561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |