Granted Patent
Utility
US 5,389,269 · App. 08/181,359
Biodegradable spin finishes
Inventors:
Rolf Kleber, Frank Weinelt, Lothar Jaeckel, Adelgunde Oberhauser
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Jan 13, 1994
Inventors
Rolf Kleber
Frank Weinelt
Lothar Jaeckel
Adelgunde Oberhauser
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.