Granted Patent
Utility
US 5,980,972 · App. 08/935,371
Method of applying drug-release coatings
Inventor:
Ni Ding
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Sep 22, 1997
Inventor
Ni Ding
Assignee (at issue)
Schneider (USA) 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.