Dispersions of microemulsions in hydrogels for drug delivery

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Implant or insert

Reexamination Certificate

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Reexamination Certificate

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08071121

ABSTRACT:
An ophthalmically bioactive agent delivery system comprising a contact lens having dispersed therein as an oil-in-water microemulsion, an ophthalmically bioactive agent encapsulated in the oil phase, the oil phase comprising a material from which the agent VAN diffuse into and migrate through the contact lens into the post-lens tear film when the contact lens is placed on the eye and wherein the microemulsion is stabilized by the presence of a surfactant with sufficient packing at the oil-water interface to attenuate the rate of diffusion into and migration of agent through the contact lens.

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Letter from Korean Associate dated May 10, 2008, informing of Office Action issued on Apr. 27, 2008 for corresponding Korean Patent Application No. 2004-7019648 based on International application No. PCT/US03/17736 for “Ophthalmic Drug Delivery System”.

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