Granted Patent
Utility
US 5,725,869 · App. 08/736,266
Microsphere reservoirs for controlled release application
Inventor:
Ray J. Lo
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Oct 24, 1996
Inventor
Ray J. Lo
Assignee (at issue)
Zeneca Limited
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.