US3384629A
Expired / Lapsed
US
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Method of shortstopping conjugated diene polymerizations
Assignee: Phillips Petroleum Co
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Filing: 1963-08-26
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Granted: 1968-05-21
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Charles W Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:08
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
IN A PROCESS WHEREIN A POLYMERIZATION MIXTURE IS FORMED BY POLYMERIZING A CONJUGATED DIENE WITH A LITHIUM-BASED CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID POLYMERIZATION MIXTURE AS A SHORTSTOPPING AGENT AN ORGANIC PEROXIDE AND THEREAFTER COAGULATING AND RECOVERING THE SHORTSTOPPED POLYMER DIRECTLY FROM THE SHORTSTOPPING STEP.
Claim 2
Dependent Claim
47 words
IN A PROCESS WHEREIN A POLYMERIZATION MIXTURE IS FORMED BY POLYMERIZING A CONJUGATED DIENE WITH A LITHIUM-BASED CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID POLYMERIZATION MIXTURE AS A SHORTSTOPPING AGENT AN ORGANIC PEROXIDE AND THEREAFTER COAGULATING AND RECOVERING THE SHORTSTOPPED POLYMER DIRECTLY FROM THE SHORTSTOPPING STEP.
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |