The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 1995
Filed:
Aug. 19, 1993
Patrick S Wong, Palo Alto, CA (US);
Felix Theeuwes, Los Altos Hills, CA (US);
Steven D Larsen, Dublin, CA (US);
Liang C Dong, Mountain View, CA (US);
Alza Corporation, Palo Alto, CA (US);
Abstract
The present invention is directed to a fluid-imbibing dispensing device for the initially delayed delivery of an active agent to a fluid environment of use and to a method of using the dispensing device. The dispenser comprises a housing having a first wall section and a second wall section in reversibly sliding telescopic arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; at least one active agent formulation in the compartment; and expansion means and a push plate in the compartment for separating apart the first and second wall sections of the housing after exposure to the environment of use to expose the active agent formulation to the environment of use.