Granted Patent
Utility
US 4,033,911 · App. 05/699,459
Process for catalyzing polyurethane foam formation using N,N-dimethyl-aminoalkoxy-propionitriles
Inventors:
Michael R. Sandner, Bela Prokai
Patented Case
View Patent ↗
Granted: Jul 5, 1977
Filed: Jun 24, 1976
Inventors
Michael R. Sandner
Bela Prokai
Assignee (at issue)
Union Carbide 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.