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. 01, 2014
Filed:
Oct. 21, 2008
Applicants:
Jie Luo, Chongqing, CN;
Meng Lin, Chongqing, CN;
BO Lin, Chongqing, CN;
Wenrun YE, Chongqing, CN;
Yongmei Qin, Chongqing, CN;
Jie Deng, Chongqing, CN;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 487/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of purifying a salt of pemetrexed having a structure of formula (III) by salting-out, wherein if Mis H, then each of Mand Mis independently H, Li, Naor K, provided that both of them are not H; if Mis Li, Naor K, then each of Mand Mis independently Li, Naor K.