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:
Feb. 14, 1989
Filed:
Mar. 10, 1987
Isaburo Fukawa, Fuji, JP;
Haruyuki Yoneda, Fuji, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A copolymer which can be employed for various molded articles, particularly for uses which require a high nonflammability, which copolymer is a crystalline aromatic polyketone type copolymer which has an intrinsic viscosity of not less than 0.40 and has a linear polymer structure comprising structural units (A) represented by the formula (A) ##STR1## structural units (B) represented by the formula (B) ##STR2## and structural units (C) represented by the formula (C.sub.1) ##STR3## or by the formula (C.sub.2) ##STR4## the molar ratio of said units (B) to said units (C) being in the range from 30:70 to 99:1, and the unit (A) and either the unit (B) or the unit (C) being linked alternately; and a process producing the same.