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. 25, 2014
Filed:
Mar. 17, 2005
Hiroyuki Sato, Fukushima-Ken, JP;
Fuminori Kobayashi, Fukushima-Ken, JP;
Yukichika Kawakami, Fukushima-Ken, JP;
Kazuyuki Yamane, Fukushima-Ken, JP;
Yoshikazu Amano, Ibaraki-Ken, JP;
Takashi Sato, Ibaraki-Ken, JP;
Hiroyuki Sato, Fukushima-Ken, JP;
Fuminori Kobayashi, Fukushima-Ken, JP;
Yukichika Kawakami, Fukushima-Ken, JP;
Kazuyuki Yamane, Fukushima-Ken, JP;
Yoshikazu Amano, Ibaraki-Ken, JP;
Takashi Sato, Ibaraki-Ken, JP;
Kureha Corporation, Tokyo, JP;
Abstract
In the production of an aliphatic polyester by ring-opening polymerization of a cyclic ester, at least a latter period of polymerization is proceeded with by way of solid-phase polymerization, and the resultant aliphatic polyester is subjected to removal of residual cyclic ester. As a result, an aliphatic polyester with a minimized content of residual monomer is obtained.