Granted Patent
Utility
US 5,424,440 · App. 08/158,167
Fluorescent benzothiazole derivatives
Inventors:
Robert E. Klem, William B. Marvin
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Nov 24, 1993
Inventors
Robert E. Klem
William B. Marvin
Assignee (at issue)
JBL Scientific, 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.