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:
Jul. 10, 2007
Filed:
Mar. 29, 2004
Applicants:
Shean-jeng Jong, Tao-Yuan, TW;
Yu-sheng Lin, Tao-Yuan, TW;
Inventors:
Shean-Jeng Jong, Tao-Yuan, TW;
Yu-Sheng Lin, Tao-Yuan, TW;
Assignee:
Chung-Shan Institute of Science & Technology, Lung-Tan, Tao-Yuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 403/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for purifying Piribedil includes mixing Piribedil solid having a purity of 98% by weight with water, boiling the mixture, adding slowly 95% ethanol to the boiling mixture to form a clear liquid, filtering the hot clear liquid, cooling the filtrate to obtain a white crystal having a purity of 99.8% by weight of Piribedil.