Granted Patent
Utility
US 4,863,744 · App. 07/026,236
Intestine drug delivery
Inventors:
John Urquhart, Felix Theeuwes
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Mar 16, 1987
Inventors
John Urquhart
Felix Theeuwes
Assignee (at issue)
ALZA CORPORATION
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.