专利名称：Osmotic device for delayed delivery of
agent
发明人：Patrick S.-L. Wong,Felix Theeuwes,Steven D.
学生周总结>打盹Larn叶绿素a颜色
申请号：US07/830160
申请日：19920131人员培训制度
烤箱菜公开号：US05312388A
公开日：
食之无味
19940517
专利内容由知识产权出版社提供
摘要：The prent invention is directed to a fluid-imbibing dispensing device for the immediate or almost immediate and extended delivery of an active agent over a prolonged period of time together with the initially delayed pul delivery of an active agent to a fluid environment of u. The dispenr compris a housing having a first wall ction and a cond wall ction in slidably telescoping arrangement with each other, which housing maintains its integrity in the environment of u; an internal compartment surrounded and defined by the housing; a first active agent delivery chamber within a portion of the compartment defined by the first wall ction, the first delivery chamber including at least one active agent formulation, an exit means for providing communication between the active agent formulation and the environment, and a first expansion means for dispensing the first active agent formulation through the exit means to the environment immediately and over a prolonged period of time; a cond active agent delivery chamber within a portion of the compartment defined by the first wall ction and adjacent the open end of the first wall ction, the
cond delivery chamber including at least one active agent formulation; and an expansion chamber within a
书法心经
portion of the compartment defined by the cond wall ction, for parating apart the first and cond wall ctions of the housing after exposure to the environment of u for dispensing the cond active agent formulation to the environment in a pul after an initially delayed period of time, the expansion chamber including a cond expansion means and a partition layer or push plate.
申请人：WONG; PATRICK S.-L.,THEEUWES; FELIX,LARSEN; STEVEN D.
世界名曲代理人：Paul L. Sabatine,Jacqueline S. Larson,Jean M. Duvall
更多信息请下载全文后查看
