Granted Patent
Utility
US 6,060,441 · App. 08/833,878
Cleaning compositions having enhanced enzyme activity
Inventors:
J. Frederick Hessel, George A. Smith, Charles B. Allen, Michael Hansberry, Karl-Heinz Maurer
Patented Case
View Patent ↗
Granted: May 9, 2000
Filed: Apr 10, 1997
Inventors
J. Frederick Hessel
George A. Smith
Charles B. Allen
Michael Hansberry
Karl-Heinz Maurer
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.