The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1981
Filed:
Jun. 01, 1979
Genrikh A Tolstikov, Ufa, SU;
Usein M Dzhemilev, Ufa, SU;
Grigory I Rutman, Sterlitamak, SU;
Jury I Michurov, Sterlitamak, SU;
Boris I Pantukh, Sterlitamak, SU;
Stanislav S Shavanov, Sterlitamak, SU;
Sagid R Rafikov, Ufa, SU;
Sofia A Egoricheva, Sterlitamak, SU;
Valery P Juriev, Ufa, SU;
Alexandr G Liakumovich, Kazan, SU;
Valerian M Sobolev, Moscow, SU;
Boris S Korotkevich, Moscow, SU;
Jury A Shmuk, Moscow, SU;
Elena Y Mandelshtamm, Moscow, SU;
Other;
Abstract
A method of preparing trans-, trans-, trans-1,5,9-cyclododecatriene which comprises cyclotrimerization of butadiene at a temperature within the range of from 50.degree. to 150.degree. C. in the presence of a catalytic system consisting of a compound of bivalent nickel, an organo-aluminium compound of the formula (1) or (2):