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:
Jan. 04, 1983
Filed:
Aug. 10, 1981
Applicant:
Inventors:
Akinobu Shiga, Niihama, JP;
Kiyoshi Matsuyama, Niihama, JP;
Masahiro Kakugo, Niihama, JP;
Yukio Naito, Niihama, JP;
Akira Nunose, Niihama, JP;
Masaharu Nishioka, Ibaraki, JP;
Assignee:
Sumitomo Chemical Company, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526137 ; 2524 / ; 526139 ; 526140 ; 526348 ; 5263486 ; 526916 ;
Abstract
In a process for producing propylene copolymer containing about 80 to 99 mol % propylene and about 1 to 20 mol % ethylene and/or an .alpha.-olefin having 4 to 18 carbon atoms using a Ziegler-Natta catalyst, the improvement which comprises said Ziegler-Natta catalyst comprising: