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:
Sep. 23, 1980
Filed:
Jun. 13, 1979
Applicant:
Inventors:
Akitoshi Sugio, Omiya, JP;
Akira Amamiya, Tokyo, JP;
Tadashi Kunii, Yotsukaichi, JP;
Tomotaka Furusawa, Matsudo, JP;
Mutsuhiko Takeda, Matsudo, JP;
Katsumasa Tanaka, Yotsukaichi, JP;
Toshikazu Umenura, Tokyo, JP;
Kiyokazu Kawaguchi, Matsudo, JP;
Assignee:
Mitsubishi Gas chemical Company, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528232 ; 528241 ; 528249 ;
Abstract
In a method for mixing a trioxane, a polymerization catalyst and a comonomer for producing of oxymethylene copolymers by continuously copolymerizing trioxane with a cyclic ether or a cyclic acetal as a comonomer, the improved method comprises following steps: