Granted Patent
Utility
US 4,358,389 · App. 06/244,976
Agent for de-icing and protecting against icing-up
Inventors:
Inge Konig-Lumer, Ulrich Schwenk, Rene Salvador, Josef Kapfinger
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Mar 18, 1981
Inventors
Inge Konig-Lumer
Ulrich Schwenk
Rene Salvador
Josef Kapfinger
Assignee (at issue)
Hoechst GmbH
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.