Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Web – sheet or filament bases; compositions of bandages; or...
Reexamination Certificate
2011-03-08
2011-03-08
Kishore, Gollamudi S (Department: 1612)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Web, sheet or filament bases; compositions of bandages; or...
C514S055000, C514S078000
Reexamination Certificate
active
07901707
ABSTRACT:
Formulations or delivery systems are provided for controlled release of therapeutically active agents. The delivery systems are composed of polymer and lipid materials and may be prepared as a gel, paste, solution, film, implant or barrier depending on the intended application. The polymer component of the matrix is the naturally occurring biomaterial, chitosan, or a mixture of chitin and chitosan. The lipid component may include phosphatidylcholine, phosphatidylserine, phosphatidylinositol, phosphatidyl or a mixture thereof. The delivery system may be used for delivery of hydrophilic agents, hydrophobic agents or combinations thereof. The therapeutically active agents may be formulated within the matrix as free agents or incorporated into particles. In a preferred embodiment the agents are incorporated into polymeric particles that are dispersed throughout the matrix.
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Allen Christine
Grant Justin
Piquette-Miller Micheline
Kishore Gollamudi S
Krupnik Eduardo
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