Granted Patent
Utility
US 5,633,309 · App. 08/595,939
Creping adhesives containing oxazoline polymers
Inventors:
Joseph F. Warchol, Cynthia D. Walton-Bongers
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: Feb 6, 1996
Inventors
Joseph F. Warchol
Cynthia D. Walton-Bongers
Assignee (at issue)
Houghton International, 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.