Details for Patent: 4,690,825

Summary for Patent: 4,690,825

Title:	Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen
Abstract:	Delivery vehicles comprised of a polymeric bead having a network of pores with an active ingredient held within the network are provided for use in a method to provide controlled release of the active ingredient. The network of pores is substantially non-collapsible upon removal of the active ingredient and the delivery vehicles are polymerized by a process in which the active ingredient also comprises the porogen during formation of the network of pores.
Inventor(s):	Won; Richard (Palo Alto, CA)
Assignee:	Advanced Polymer Systems, Inc. (Redwood City, CA)
Application Number:	06/784,382
Patent Claim Types: see list of patent claims	Composition; Delivery; Process; Formulation; Use;

Drugs Protected by US Patent 4,690,825

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate

International Family Members for US Patent 4,690,825

Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	68965
Australia	591264
Australia	7132287
Germany	3774266