Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2006-08-03
2008-12-16
Saeed, Kamal A (Department: 1626)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C548S262200
Reexamination Certificate
active
07465749
ABSTRACT:
Provided is a process for purifying a letrozole product that contains an isoletrozole impurity, which process preferably includes converting at least a portion of the isoletrozole impurity into 4,4′-dicyanobenzophenone and removing 4,4′-dicyanobenzophenone, to produce a purified letrozole product.
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Bentolila Moshe
Friedman Oded
Hasson Michal
Isenberg Hila
Manoff Efrat
Chemagis Ltd.
Leydig , Voit & Mayer, Ltd.
Saeed Kamal A
Young Shawquia
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