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. 12, 1994
Filed:
Nov. 19, 1991
Applicant:
Inventors:
Brian G Amsden, Downsview, Ontario M3J 2V1, CA;
Yu-Ling Cheng, Mississauga Ontario L5G 3C7, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424473 ; 424426 ; 424469 ; 424486 ;
Abstract
Described herein is a drug delivery system useful to deliver drugs at low dosage levels to patients in a sustained fashion and at a controlled rate. The system comprises a wettable polymeric matrix in which is dispersed a multiplicity of particles containing a substantially homogeneous blend of osmotically active excipient and not more than about 10% by weight of drug. The system is particularly well suited for delivery of therapeutic macromolecules such as protein drugs. Delivery of epidermal growth factor is exemplified.