Granted Patent
Utility
US 4,968,774 · App. 07/463,194
Amino-plastic resins intended for the improvement of cellulosed fibres and their application
Inventors:
Wilhelm Didier, Loison Sylvie, Blanc Alain
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Jan 10, 1990
Inventors
Wilhelm Didier
Loison Sylvie
Blanc Alain
Assignee (at issue)
Societe Francaise Hoechst
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.