Granted Patent
Utility
US 5,256,557 · App. 07/813,705
Purified alkaline protease concentrate and method of preparation
Inventors:
Jayarama K. Shetty, Chimanbhai P. Patel, Mary Ann Nicholson
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Dec 27, 1991
Inventors
Jayarama K. Shetty
Chimanbhai P. Patel
Mary Ann Nicholson
Assignee (at issue)
Solvay Enzymes, 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.