Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form
Reexamination Certificate
2005-06-28
2005-06-28
Kishore, Gollamudi S. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Particulate form
C424S489000, C424S490000, C424S493000, C424S494000, C424S495000, C424S400000, C424S451000, C424S452000, C424S457000, C424S458000, C424S459000, C424S461000, C424S462000, C424S464000, C424S465000, C424S468000, C514S648000, C514S649000
Reexamination Certificate
active
06911217
ABSTRACT:
A controlled release bead comprises: (i) a core unit of a substantially water-soluble or water-swellable inert material; (ii) a first layer on the core unit of a substantially water-insoluble polymer; (iii) a second layer covering the first layer and containing an active ingredient; and (iv) a third layer of polymer on the second layer effective for controlled release of the active ingredient, wherein the first layer is adapted to control water penetration into the core. A method of producing the controlled release bead is also disclosed.
REFERENCES:
patent: 5645858 (1997-07-01), Kotwal et al.
patent: 6312728 (2001-11-01), Beiman et al.
patent: A2061217 (1982-09-01), None
patent: 7-107450 (1995-01-01), None
patent: 7-275688 (1995-10-01), None
patent: A1-9601621 (1996-01-01), None
patent: A1-9629992 (1996-10-01), None
patent: WO 98/03067 (1998-01-01), None
patent: WO 98/03067 (1998-01-01), None
Gren Torkel
Ringberg Anders
Wald Randy J.
Wikberg Martin
Kishore Gollamudi S.
Oh Simon J.
Pharmacia AB
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