PEG-poly(ortho ester) graft copolymers and pharmaceutical...

Details PEG-poly(ortho ester) graft copolymers and pharmaceutical... PEG-poly(ortho ester) graft copolymers and pharmaceutical...

2006-03-28

2008-11-25

Hartley, Michael G. (Department: 1618)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

C424S425000, C424S486000

Reexamination Certificate

active

07456213

ABSTRACT:
This invention relates to graft copolymer delivery vehicles comprising a polyethyleneglycol-poly(ortho ester), and to controlled release pharmaceutical compositions comprising the delivery vehicle and an active agent. The graft copolymer delivery vehicles may be thermogels graft copolymers. The pharmaceutical compositions may be in the form of a topical, syringable, or injectable formulation for local controlled delivery of the active agent.

REFERENCES:
patent: 5939453 (1999-08-01), Heller et al.
patent: 5968543 (1999-10-01), Heller et al.
patent: 2003/0152630 (2003-08-01), Ng et al.

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