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:
Apr. 17, 2006
Filed:
Dec. 02, 2001
Joaquina Faour, Buenos Aires, AR;
Jorge E. Mayorga, Buenos Aires, AR;
Joaquina Faour, Buenos Aires, AR;
Jorge E. Mayorga, Buenos Aires, AR;
Osmotica Corp., Tortola, VG;
Abstract
The present invention provides a simple and improved multi-layered osmotic device () that is capable of delivering a first active agent in an outer lamina () to one environment of use and a second active agent in the core () to another environment of use. Particular embodiments of the invention provide osmotic devices in which the first and second active agents are similar or dissimilar. An erodible polymer coat () between an internal semipermeable membrane () and a second active agent-containing external coat () comprises poly(vinylpyrrolidone)-(vinyl acetate) copolymer. This particular erodible polymer results in an improved multi-layered osmotic device possessing advantages over related devices known in the art. The active agent in the core () is delivered through a pore () containing an erodible plug (). The osmotic device () can be coated by a final finish coat ().