Granted Patent
Utility
US 4,611,072 · App. 06/741,330
Heat-sensitive recording material
Inventors:
Hermann Nachbur, Christel Tempel
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Jun 5, 1985
Inventors
Hermann Nachbur
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.