Granted Patent
Utility
US 4,348,234 · App. 06/130,304
Coating compositions for the production of a recording material
Inventor:
Manuel Cespon
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Mar 14, 1980
Inventor
Manuel Cespon
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.