Granted Patent
Utility
US 4,396,391 · App. 06/393,640
Treating cellulose textile fabrics with dimethylol dihydroxyethyleneurea-polyol
Inventor:
Bernard F. North
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Jun 30, 1982
Inventor
Bernard F. North
Assignee (at issue)
Sun 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.