US3294768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of conjugated diene polymers
Assignee: Phillips Petroleum Co
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Filing: 1963-11-14
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Granted: 1966-12-27
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Clinton F Wofford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR PREPARING CONJUGATED DIENE POLYMERS WHICH COMPRISES CONTACTING IN A POLYMERIZATION ZONE A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (1) AT LEAST ONE CONJUGATED DIENE CONTAINING FROM 4 TO 12 CARBON ATOMS PER MOLCULE AND (2) A MIXTURE OF A CONJUGATED DIENE CONTAINING FROM 4 TO 12 CARBON ATOMS PER MOLECULE AND A VINYL-SUBSTITUTED AROMATIC HYDROCARBON IN WHICH SAID VINY; GROUPE IS ATTACHED TO A NECLEAR CARBON ATOM WITH A CATALYST WHICH FORMS ON MIXING MATERIALS CONSISTING ESSENTIALLY OF (A) AN ORGANOLITHIUM COMPOUND HAVING THE FORMULA R(LI)X, WHEREIN R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC CYCLOALPHATIC AND AROMATIC RADICALS CONTAINING FROM 1 TO C20 CARBON ATOMS AND X IS AN INTEGER FROM 1 TO 4, INCLUSIVE, AND (B) AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FOLLOWING FORMULAS:
Claim 2
Dependent Claim
141 words
A PROCESS FOR PREPARING CONJUGATED DIENE POLYMERS WHICH COMPRISES CONTACTING IN A POLYMERIZATION ZONE A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (1) AT LEAST ONE CONJUGATED DIENE CONTAINING FROM 4 TO 12 CARBON ATOMS PER MOLCULE AND (2) A MIXTURE OF A CONJUGATED DIENE CONTAINING FROM 4 TO 12 CARBON ATOMS PER MOLECULE AND A VINYL-SUBSTITUTED AROMATIC HYDROCARBON IN WHICH SAID VINY; GROUPE IS ATTACHED TO A NECLEAR CARBON ATOM WITH A CATALYST WHICH FORMS ON MIXING MATERIALS CONSISTING ESSENTIALLY OF (A) AN ORGANOLITHIUM COMPOUND HAVING THE FORMULA R(LI)X, WHEREIN R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC CYCLOALPHATIC AND AROMATIC RADICALS CONTAINING FROM 1 TO C20 CARBON ATOMS AND X IS AN INTEGER FROM 1 TO 4, INCLUSIVE, AND (B) AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FOLLOWING FORMULAS:
References Cited (Backward Citations)
GB817695A
Cited
US2849432A
Cited
US3049528A
Cited
US3122592A
Cited
US3177190A
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US3208988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |