Granted Patent
Utility
US 5,326,388 · App. 08/089,503
Color changing compositions
Inventors:
Richard E. Miller, Charlene R. Couch
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Jul 16, 1993
Inventors
Richard E. Miller
Charlene R. Couch
Assignee (at issue)
BINNEY & SMITH 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.