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. 12, 1994
Filed:
Jul. 15, 1993
Applicant:
Inventors:
Katsuji Tanaka, Machida, JP;
Hitoshi Matsumoto, Machida, JP;
Takuji Hirahara, Kawasaki, JP;
Osamu Kishiro, Atsugi, JP;
Assignee:
Mitsubishi Kasei Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
428 357 ; 528272 ; 528283 ; 528285 ; 528302 ; 528305 ; 5283086 ; 528481 ; 528503 ; 428 341 ; 2642091 ; 264291 ; 264294 ;
Abstract
A hollow article or sheet of a copolyester which comprises, as main components, terephthalic acid as a dicarboxylic acid component and ethylene glycol as a diol component and which is characterized by: (1) isophthalic acid as a dicarboxylic acid component being from 0.5 to 3.0 mol %, (2) diethylene glycol as a diol component being from 1.0 to 2.5 mol %, (3) the intrinsic viscosity being from 0.60 to 1.50 dl/g, (4) the concentration of terminal carboxyl groups being at most 18 eq/ton, and (5) the content of a cyclic trimer being at most 0.40% by weight.