Granted Patent
Utility
US 3,994,850 · App. 05/646,448
Modified urea-formaldehyde resin adhesive
Inventors:
Walter N. Willegger, Horst Thiel
Patented Case
View Patent ↗
Granted: Nov 30, 1976
Filed: Jan 5, 1976
Inventors
Walter N. Willegger
Horst Thiel
Assignee (at issue)
Champion International Corporation Limited
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.