Granted Patent
Utility
US 6,602,521 · App. 09/164,642
Multiplex drug delivery system suitable for oral administration
Inventors:
Richard Ting, Charles Hsiao
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Sep 29, 1998
Inventors
Richard Ting
Charles Hsiao
Assignee (at issue)
Impax 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.