US3691249A
Expired / Lapsed
US
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Dimerization of diolefinic compounds
Assignee: Universal Oil Products Co
•
Filing: 1970-10-07
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Granted: 1972-09-12
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Expires: 1990-10-07
Abstract
Abstract Conjugated diolefinic hydrocarbons are dimerized in the presence of certain organopalladium complex catalytic compositions of matter at dimerization conditions to produce a selective dimer of a starting material.
Inventors
- 👤 Edwin L De Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:07
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
13 words
The process of claim 1 in which said conjugated diolefinic hydrocarbon is isoprene.
Claim 2
Dependent Claim
15 words
The process as set forth in claim 1 in which said organopalladium complex is tetrakis(triphenylphosphite)palladium(0).
Claim 3
Dependent Claim
15 words
The process as set forth in claim 1 in which said organopalladium complex is tetrakis(tribenzylphosphite)palladium(0).
Claim 4
Dependent Claim
15 words
The process as set forth in claim 1 in which Said organopalladium complex is tetrakis(tritolylphosphite)palladium(0).
Claim 5
Dependent Claim
16 words
The process as set forth in claim 3 in which said conjugated diolefinic hydrocarbon is 2-methyl-1,3-butadiene.
Claim 6
Dependent Claim
16 words
The process as set forth in claim 3 in which said conjugated diolefinic hydrocarbon is 1,3-butadiene.
Claim 7
Dependent Claim
16 words
The process as set forth in claim 3 in which said conjugated diolefinic hydrocarbon is 2-methyl-6-methylene-2,7-octadiene.
Claim 8
Dependent Claim
13 words
The process of claim 3 in which said conjugated diolefinic hydrocarbon is isoprene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |