Granted Patent
Utility
US 5,677,191 · App. 08/523,275
Organic chemical compound test papers and method of using same
Inventor:
William L. Truett
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Sep 5, 1995
Inventor
William L. Truett
Assignee (at issue)
Janos Technology 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.