Granted Patent
Utility
US 4,720,383 · App. 06/864,085
Softening and conditioning fibers with imidazolinium compounds
Inventors:
John E. Drach, Robert D. Evans, Joseph J. Fanelli, Anthony J. O'Lenick, Jr.
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: May 16, 1986
Inventors
John E. Drach
Robert D. Evans
Joseph J. Fanelli
Anthony J. O'Lenick, Jr.
Assignee (at issue)
QUAKER CHEMICAL CORPORATION
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.