Granted Patent
Utility
US 5,478,515 · App. 08/055,127
Salt block release agents
Inventors:
Kurt John Waatti, Richard A. Bychowski
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Apr 29, 1993
Inventors
Kurt John Waatti
Richard A. Bychowski
Assignee (at issue)
Morton International, 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.