Granted Patent
Utility
US 6,083,532 · App. 08/985,986
Sustained release formulation containing three different types of polymers and tablet formed therefrom
Inventors:
Guohua Zhang, Prasad Pinnamaraju, Muhammad Ali
Patented Case
View Patent ↗
Granted: Jul 4, 2000
Filed: Dec 5, 1997
Inventors
Guohua Zhang
Prasad Pinnamaraju
Muhammad Ali
Assignee (at issue)
Duramed Pharmaceuticals, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.