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:
Aug. 26, 2008
Filed:
Nov. 11, 2003
Applicants:
Guocheng Wang, Tianjin, CN;
Xinbo LU, Tianjin, CN;
Qinxuan Liu, Tianjin, CN;
Yu Tang, Tianjin, CN;
Liping Yang, Tianjin, CN;
Inventors:
Guocheng Wang, Tianjin, CN;
Xinbo Lu, Tianjin, CN;
Qinxuan Liu, Tianjin, CN;
Yu Tang, Tianjin, CN;
Liping Yang, Tianjin, CN;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/6561 (2006.01); A61K 31/675 (2006.01);
U.S. Cl.
CPC ...
Abstract
A new crystal form of adefovir dipivoxil {9-[2-[bis(pivaloyloxy)-methoxy]-phosphinyl]-methoxyl]-ethyl]-adenime} and its composition is disclosed, as is a method to prepare the crystal comprising placing adefovir dipivoxil in a round bottom flask, adding organic solvent and dissolivng adefovir dipivoxil ultrasonically to form and adefovir dipivoxil solution, and spray drying the adefovir dipivoxil solution.