Granted Patent
Utility
US 5,646,320 · App. 08/260,932
Process for making isethionate ester salts
Inventors:
Timothy J. Cassady, Norman Milstein, Richard Crews
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Jun 16, 1994
Inventors
Timothy J. Cassady
Norman Milstein
Richard Crews
Assignee (at issue)
Henkel 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.