Granted Patent
Utility
US 5,474,194 · App. 07/556,530
Closure with irreversible color change system
Inventors:
Robert J. Heilman, Mark Egger, Leonard Rozanksi, H. Darrell Iler
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Jul 9, 1990
Inventors
Robert J. Heilman
Mark Egger
Leonard Rozanksi
H. Darrell Iler
Assignee (at issue)
Continental White Cap, 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.