US3294774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered tertiary amines in polymerization of conjugated diolefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1959-03-18
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Granted: 1966-12-27
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Expires: 1979-03-18
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Gerber
- 👤 Kuntz Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
IN A PROCESS FOR PREPARING SUBSTANTIALLY CIS-POLYSIOPRENE AT AN INCREASED POLYMERIZATION RATE, THE IMPROVEMENT WHICH COMPRISES CONTACTING ISOPRENE IN THE PRESENCE OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF N-BUTYL LITHIUM AND N,N-DIETHYL ANILINE, IN THE PRESENCE OF AN INERT SOLVENT, AT A TEMPERATURE OF -20* TO 200*C. AND A PRESSURE FROM 0.5 TO 100 ATMOSPHERES, THE N-BUTYL LITHIUM BEING UTILIZED IN AN AMOUNT OF FROM 0.01 TO 5.0 MOLE PERCENT BASED ON THE ISOPRENE AND N,N-DIETHYL ANILINE BEING UTILIZED IN AN AMOUNT OF FROM 0.001 TO 5.0 MOLE PERCENT BASED ON THE ISOPRENE.
Claim 2
Dependent Claim
93 words
IN A PROCESS FOR PREPARING SUBSTANTIALLY CIS-POLYSIOPRENE AT AN INCREASED POLYMERIZATION RATE, THE IMPROVEMENT WHICH COMPRISES CONTACTING ISOPRENE IN THE PRESENCE OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF N-BUTYL LITHIUM AND N,N-DIETHYL ANILINE, IN THE PRESENCE OF AN INERT SOLVENT, AT A TEMPERATURE OF -20* TO 200*C. AND A PRESSURE FROM 0.5 TO 100 ATMOSPHERES, THE N-BUTYL LITHIUM BEING UTILIZED IN AN AMOUNT OF FROM 0.01 TO 5.0 MOLE PERCENT BASED ON THE ISOPRENE AND N,N-DIETHYL ANILINE BEING UTILIZED IN AN AMOUNT OF FROM 0.001 TO 5.0 MOLE PERCENT BASED ON THE ISOPRENE.
Claim 3
Dependent Claim
94 words
IN A PROCESS FOR PREPARING SUBSTANTIALLY CIS-POLYISOPRENE AT AN INCREASED POLYMERIZATION RATE, THE IMPROVEMENT WHICH COMPRISES CONTACTING ISOPRENE IN THE PRESENCE OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF N-BUTYL LITHIUM AND TRI-ISOAMYLAMINE IN THE PRESENCE OF AN INERT SOLVENT, AT A TEMPERATURE OF FROM -20* TO 200*C. AND A PRESSURE OF RROM 0.5 TO 100 ATMOSPHERES, THE N-BUTYL LITHIUM BEING UTILIZED IN AN AMOUNT OF FROM 0.01 TO 5.0 MOL PERCENT BASED ON THE ISOPERENE AND THE TRI-ISOAMYLAMINE BEING UTILIZED IN AN AMOUNT OF FROM 0.001 TO 5.0 MOL PERCENT BASED ON THE ISOPRENE.
Claim 4
Dependent Claim
94 words
IN A PROCESS FOR PREPARING SUBSTANTIALLY CIS-POLYISOPRENE AT AN INCREASED POLYMERIZATION RATE, THE IMPROVEMENT WHICH COMPRISES CONTACTING ISOPRENE IN THE PRESENCE OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF N-BUTYL LITHIUM AND TRI-ISOAMYLAMINE IN THE PRESENCE OF AN INERT SOLVENT, AT A TEMPERATURE OF FROM -20* TO 200*C. AND A PRESSURE OF RROM 0.5 TO 100 ATMOSPHERES, THE N-BUTYL LITHIUM BEING UTILIZED IN AN AMOUNT OF FROM 0.01 TO 5.0 MOL PERCENT BASED ON THE ISOPERENE AND THE TRI-ISOAMYLAMINE BEING UTILIZED IN AN AMOUNT OF FROM 0.001 TO 5.0 MOL PERCENT BASED ON THE ISOPRENE.
References Cited (Backward Citations)
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US2529315A
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US2610965A
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US2905645A
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US2849432A
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US3095406A
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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 |