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:
Jul. 12, 1994
Filed:
Nov. 30, 1992
Applicant:
Inventors:
Shigenobu Miyake, Oita, JP;
Nobuyuki Kibino, Oita, JP;
Takashi Monoi, Oita, JP;
Hiroyuki Ohira, Oita, JP;
Shintaro Inazawa, Oita, JP;
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556 12 ; 556-9 ; 556 11 ; 556 51 ; 556 52 ; 556 53 ; 556 28 ; 502152 ; 526127 ; 526160 ;
Abstract
A metallocene having an asymmetric ligand which is represented by the formula below and its enantiomer: ##STR1## and a process for producing a polyolefin using the same as a catalyst component. The metallocene and its enantiomer are particularly effective in the production of highly stereospecific polyolefins.