Granted Patent
Utility
US 4,335,672 · App. 06/252,430
Apparatus for coating a web with a viscous coating material
Inventor:
Karlheinz F. Krussig
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Apr 9, 1981
Inventor
Karlheinz F. Krussig
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.