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:
Apr. 01, 1986
Filed:
Apr. 17, 1985
Applicant:
Inventors:
Takuzo Kasuga, Tokyo, JP;
Takeshi Asano, Shizuoka, JP;
Yukio Ikenaga, Shizuoka, JP;
Masami Yamawaki, Shizuoka, JP;
Yasuyuki Takeda, Shizuoka, JP;
Koichi Ichimura, Shizuoka, JP;
Assignee:
Polyplastics Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528232 ; 528240 ; 528241 ;
Abstract
The polymer or a copolymer of trioxane copolymer is manufactured by adding 0.001 to 2.0 wt. % of a stereo-hindering phenol to the monomer mixture in advance to the polymerization step and polymerizing trioxane and an optional co-monomer in the presence of a cationic, active catalyst and said phenol.