Granted Patent
Utility
US 4,453,744 · App. 06/385,595
Pressure-sensitive or heat-sensitive recording material
Inventors:
Albert Wurmli, Christel Tempel
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jun 7, 1982
Inventors
Albert Wurmli
Christel Tempel
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.