Sustained release formulations
June 6, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOsmotic system having laminar arrangement for programming delivery of active agent Laminated osmotic system for dispensing beneficial agent Controlled release tablet System with microporous releasing diffusor Dispenser with diffuser Sustained release therapeutic compositions based on high molecular weight hydroxypropylmethylcellulose Drug delivery system comprising a reservoir containing a plurality of tiny pills Osmotic device with wall comprising cellulose ether and permeability enhancer Controlled release formulation Patent #: 4610870 InventorsApplicationNo. 06/871643 filed on 06/06/1986US Classes:424/468, Sustained or differential release type424/480, Cellulose or derivative424/482, Containing solid synthetic polymers424/494, Cellulose derivatives424/495, Ethyl cellulose424/497, Containing solid synthetic polymers427/2.19Retarded or controlled-release layer produced (e.g., enteric)ExaminersPrimary: Lusignan, Michael R.Attorney, Agent or FirmInternational ClassesA61K 9/20 (20060101)A61K 9/28 (20060101) AbstractDrug delivery systems which exhibit sustained release properties when administered are produced using a "dual control" system which employs polymeric agents in core and membrane portions.Other References
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