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:
May. 26, 2009
Filed:
Jan. 20, 2006
Applicants:
Jie Ren, Shanghai, CN;
Qinfeng Wang, Shanghai, CN;
Naiwen Zhang, Shanghai, CN;
Inventors:
Assignee:
Shanghai Tong-Jie-Liang Biomaterials Co., Ltd., Shanghai, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/08 (2006.01); C08G 63/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for preparing poly (lactic acid)-based resin or its co-polymers with high molecular weight, the method comprising a condensation process using a thiaole cation condensing agent, as well as the polymers obtained therefrom.