US3036056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polymers of conjugated dienes
Assignee: Phillips Petroleum Co
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Filing: 1958-11-04
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Granted: 1962-05-22
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Expires: 1978-11-04
Abstract
No abstract record available.
Inventors
- 👤 Pat F Rion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR PREPARING POLYMERS OF CONJUGATED DIENES IN WHICH A CONJUGATED DIENE IS POLYMERIZED BY CONTACTING IN THE PRESENCE OF A HYDDROCARBON DILUENT A CATALYST COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF METAL HYDRIDES AND ORGANOMETALS AND A SOLUTION OF POLYMER IN SAID HYDROCARBON DILUENT IS OBTAINED, THE IMPROVEMENT WHICH COMPRISES CONCENTRATING SAID POLYMER SOLUTION BY REMOVING THEREFROM A PORTION OF SAID HYDROCARBON DILENT SO AS TO OBTAIN A CONCENTRATED POLYMER SOLUTION CONTAINING NOT MORE THAN ABOUT 40 WEIGHT PERCENT POLYMER; PASSING THE SAID CONCENTRATED POLYMER SOLUTION FREE OF ANY PRECIPITATED SOLID POLYMER INTO AN EXTRACTION-EXTRUCTION ZONE WHERRIN SAID POLYMER IS HEATED AND WORKED; AND RECOVERING FROM SAID ZONE POLYMER WHICH IS SUBSTANTIALLY FREE OF ANY OF SAID HYDROCARBON DILUENT.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR PREPARING POLYMERS OF CONJUGATED DIENES IN WHICH A CONJUGATED DIENE IS POLYMERIZED BY CONTACTING IN THE PRESENCE OF A HYDDROCARBON DILUENT A CATALYST COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF METAL HYDRIDES AND ORGANOMETALS AND A SOLUTION OF POLYMER IN SAID HYDROCARBON DILUENT IS OBTAINED, THE IMPROVEMENT WHICH COMPRISES CONCENTRATING SAID POLYMER SOLUTION BY REMOVING THEREFROM A PORTION OF SAID HYDROCARBON DILENT SO AS TO OBTAIN A CONCENTRATED POLYMER SOLUTION CONTAINING NOT MORE THAN ABOUT 40 WEIGHT PERCENT POLYMER; PASSING THE SAID CONCENTRATED POLYMER SOLUTION FREE OF ANY PRECIPITATED SOLID POLYMER INTO AN EXTRACTION-EXTRUCTION ZONE WHERRIN SAID POLYMER IS HEATED AND WORKED; AND RECOVERING FROM SAID ZONE POLYMER WHICH IS SUBSTANTIALLY FREE OF ANY OF SAID HYDROCARBON DILUENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |