Patent US2670978A successfully refreshed from Google Patents.
Patent US3287344A successfully refreshed from Google Patents.
US3287344A
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Removal of catalyst residues from carboxy-telechelic polymers
Assignee: Phillips Petroleum Co
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Filing: 1962-11-19
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Granted: 1966-11-22
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Charles W Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:32
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08C2/00; C08C2/02; C08C2/04; C08C2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE PURIFICATION AND RECOVERY OF CARBOXY TELECHELIC POLYBUTADIENE FROM A SOLUTION OF SAID POLYMER IN CYCLOHEXANE, WHEREIN THE POLYMER CONCENTRATION IN SAID CYCLOHEXANE RANGES FROM 5 TO 10 WEIGHT PERCENT, SAID SOLUTION ALSO CONTAINING ORGANO ALKALI METAL CATALYST INORGANIC RESIDUE WHICH COMPRISES: ADMIXING WITH SAID SOLUTION METHANOL IN THE RANGE OF 20 TO 40 AND 60 TO 100 VOLUMES OF METHANOL PER 100 VOLUMES OF POLYMER SOLUTION, SO AS TO FORM TWO PHASES THEREWITH AND WHICH WILL SUBSTANTIALLY REMOVE SAID CATALYST RESIDUE FROM THE POLYMER SOLUTION TO THE RESULTING METHANOL PHASE; AND RECOVER POLYBUTDIENE SUBSTANTIALLY FREED OF SAID RESIDUE FROM THE RESULTING CYCLOHEXANE PHASE.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE PURIFICATION AND RECOVERY OF CARBOXY TELECHELIC POLYBUTADIENE FROM A SOLUTION OF SAID POLYMER IN CYCLOHEXANE, WHEREIN THE POLYMER CONCENTRATION IN SAID CYCLOHEXANE RANGES FROM 5 TO 10 WEIGHT PERCENT, SAID SOLUTION ALSO CONTAINING ORGANO ALKALI METAL CATALYST INORGANIC RESIDUE WHICH COMPRISES: ADMIXING WITH SAID SOLUTION METHANOL IN THE RANGE OF 20 TO 40 AND 60 TO 100 VOLUMES OF METHANOL PER 100 VOLUMES OF POLYMER SOLUTION, SO AS TO FORM TWO PHASES THEREWITH AND WHICH WILL SUBSTANTIALLY REMOVE SAID CATALYST RESIDUE FROM THE POLYMER SOLUTION TO THE RESULTING METHANOL PHASE; AND RECOVER POLYBUTDIENE SUBSTANTIALLY FREED OF SAID RESIDUE FROM THE RESULTING CYCLOHEXANE PHASE.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |