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:
May. 16, 1989
Filed:
Oct. 30, 1986
Gautam R Ranade, Groton, CT (US);
Pfizer Inc., New York, NY (US);
Abstract
A matrix device for controlled release of at least one active agent to an ambient environment, said matrix comprising an active agent--or agents--containing polymer which has been subjected to tensile stress. Included is a laminate device comprising at least one matrix as core sheet, said core sheet or sheets comprising the active agent or agents in a polymer matrix which has been subjected to stress and, in a further embodiment, a porosity enhancing agent in admixture with said agent; the core sheet or sheets being alternately sandwiched or interposed between coextensive inert polymeric films substantially impermeable to said environment and to said agent or agents, said device being perforated by one or a plurality of macroholes extending through said sheets and said films. Also included are methods for making such a device.