US3261875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cyclic dienes
Assignee: Union Carbide Corp
•
Filing: 1962-07-11
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Granted: 1966-07-19
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Expires: 1982-07-11
Abstract
No abstract record available.
Inventors
- 👤 Roy L Pruett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:51
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/22; C07C2531/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS WHICH COMPRISES CONTACTING A CONJUGATED ALKADIENE CONTAINING FROM 4 TO 12 CARBON ATOMS WITH FROM ABOUT 0.1 TO ABOUT 25 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE CONJUGATED ALKADENE, OF AN ADMIXTURE OF BIS(CYCLOPENTADIENYL)NICKEL AND A TRIARYLPHOSPHINE, UNDER HYDROGEN ATOMSPHERE, AT A TEMPRATURE OF FROM ABOUT 50*C. TO ABOUT 200*C., AND FROM A PERIOD OF TIME SUFFICIENT TO DIMERIZE SAID ALKADIENE.
Claim 2
Dependent Claim
64 words
A PROCESS WHICH COMPRISES CONTACTING A CONJUGATED ALKADIENE CONTAINING FROM 4 TO 12 CARBON ATOMS WITH FROM ABOUT 0.1 TO ABOUT 25 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE CONJUGATED ALKADENE, OF AN ADMIXTURE OF BIS(CYCLOPENTADIENYL)NICKEL AND A TRIARYLPHOSPHINE, UNDER HYDROGEN ATOMSPHERE, AT A TEMPRATURE OF FROM ABOUT 50*C. TO ABOUT 200*C., AND FROM A PERIOD OF TIME SUFFICIENT TO DIMERIZE SAID ALKADIENE.
References Cited (Backward Citations)
US2964575A
Cited
US2972640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |