Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Phosphorus containing other than solely as part of an...
Reexamination Certificate
2003-11-11
2008-08-26
Berch, Mark L (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Phosphorus containing other than solely as part of an...
C544S244000
Reexamination Certificate
active
07417036
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.
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Liu Qinxuan
Lu Xinbo
Tang Yu
Wang Guocheng
Yang Liping
Ballard Spahr Andrews & Ingersoll LLP
Berch Mark L
Tianjin Kinsly Pharmaceutical Co. Ltd.
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