Granted Patent
Utility
US 4,917,951 · App. 07/124,824
Lipid vesicles formed of surfactants and steroids
Inventor:
Donald F. H. Wallach
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Nov 24, 1987
Inventor
Donald F. H. Wallach
Assignee (at issue)
Micro-Pak, 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.