Granted Patent
Utility
US 4,865,983 · App. 07/129,016
Cleaning compositions containing protease produced by vibrio and method of use
Inventor:
Donald R. Durham
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Dec 4, 1987
Inventor
Donald R. Durham
Assignee (at issue)
W.R. Grace & Co. Conn.
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.