Granted Patent
Utility
US 5,230,708 · App. 07/361,671
Methods and compositions to enhance stain resistance of nylon carpet fibers: thlocyanate to reduce yellowing
Inventors:
Dale A. Hangey, Paul William Richard Harris, Daniel J. Corcoran, Jr., Michael P. Friedberger, Charles J. Cole, William A. Archie, Roger Spitz
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Jun 1, 1989
Inventors
Dale A. Hangey
Paul William Richard Harris
Daniel J. Corcoran, Jr.
Michael P. Friedberger
Charles J. Cole
William A. Archie
Roger Spitz
Assignee (at issue)
AlliedSignal, Inc.
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.