Granted Patent
Utility
US 5,550,163 · App. 08/285,079
Method for reducing filtrate waste in a manufacturing process of a pharmaceutical product containing benzalkonium chloride
Inventors:
Shulin Ding, Robert J. Pallo, Walter L. Tien, Orest Olejnik
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Aug 3, 1994
Inventors
Shulin Ding
Robert J. Pallo
Walter L. Tien
Orest Olejnik
Assignee (at issue)
Allergan, 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.