Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills
Reexamination Certificate
2007-01-16
2007-01-16
Acquah, Samuel A. (Department: 1711)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Tablets, lozenges, or pills
C424S457000, C424S462000, C424S468000, C424S486000, C525S437000, C514S001000, C514S772300, C514S785000, C514S772700, C514S805000, C528S403000
Reexamination Certificate
active
11371959
ABSTRACT:
Bioerodible poly(ortho esters) useful as orthopedic implants or vehicles for the sustained delivery of pharmaceutical, cosmetic and agricultural agents from dioxane-based di(ketene acetals). Block copolymers contain these bioerodible poly(ortho esters). These block copolymers have both hydrophilic and hydrophobic blocks. They form micelles in aqueous solution, making them suitable for encapsulation or solubilization of hydrophobic or water-insoluble materials; and they also form bioerodible matrices for the sustained release of active agents.
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Heller Jorge
Ng Steven Y.
A.P. Pharma, Inc.
Acquah Samuel A.
Heller Ehrman LLP
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