Granted Patent
Utility
US 4,980,176 · App. 07/034,609
Preservative compositions and uses thereof
Inventors:
Philip A. Berke, William E. Rosen
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Apr 6, 1987
Inventors
Philip A. Berke
William E. Rosen
Assignee (at issue)
Sutton Laboratories, 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.