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. 24, 2012
Filed:
Feb. 06, 2008
Applicants:
Kiyotsuna Toyohara, Iwakuni, JP;
Midori Ikegame, Iwakuni, JP;
Hideki Yamane, Kyoto, JP;
Yoshiharu Kimura, Kyoto, JP;
Daisuke Masaki, Ibaraki, JP;
Shin to, Tokyo, JP;
Inventors:
Kiyotsuna Toyohara, Iwakuni, JP;
Midori Ikegame, Iwakuni, JP;
Hideki Yamane, Kyoto, JP;
Yoshiharu Kimura, Kyoto, JP;
Daisuke Masaki, Ibaraki, JP;
Shin To, Tokyo, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 63/91 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is an object of the present invention to produce a polylactic acid having a high molecular weight such as a weight average molecular weight (Mw) of more than 100,000 from which only a stereocomplex crystal is grown even by repeating melting and crystallization. The present invention is a process of producing a polylactic acid, including the steps of: