Granted Patent
Utility
US 5,658,948 · App. 08/579,001
Enhancement of benzalkonium chloride preservative activity in formulations containing an incompatible drug using amino acids having net positive charge
Inventor:
Jasmin C. Lucero
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Dec 27, 1995
Inventor
Jasmin C. Lucero
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.