Patent US3294774A successfully refreshed from Google Patents.
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
•
Granted: 1966-12-27
•
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
2026-11-01 16:20
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)
CH61837A
Cited
US2529315A
Cited
US2610965A
Cited
US2905645A
Cited
US2849432A
Cited
US3095406A
Cited
US3036056A
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 |