Granted Patent
Utility
US 5,318,939 · App. 07/758,931
Pressure-sensitive or heat-sensitive recording material
Inventors:
Hugh Stephen Laver, Mario Slongo
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Sep 11, 1991
Inventors
Hugh Stephen Laver
Mario Slongo
Assignee (at issue)
Ciba-Geigy
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.