Granted Patent
Utility
US 5,873,187 · App. 08/652,132
Spherodized fluorescent beads for improved roadway pavement marker visibility
Inventors:
Edward M. Kozak, Craig S. Bartholomew
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: May 23, 1996
Inventors
Edward M. Kozak
Craig S. Bartholomew
Assignee (at issue)
IIT Research Institute
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.