Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2011-05-10
2011-05-10
Aulakh, Charanjit S (Department: 1625)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C546S045000, C546S044000
Reexamination Certificate
active
07939543
ABSTRACT:
The present invention is directed to a process for reducing the level of α, β-unsaturated ketone in an opioid analgesic composition by hydrogenation the opioid analgesic composition with diimide or a diimide progenitor.
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Aulakh Charanjit S
Davidson Davidson & Kappel LLC
Purdue Pharma L.P.
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