Granted Patent
Utility
US 4,720,536 · App. 06/871,226
Blends of secondary alkyl aromatic diamines and polyhydric alcohols as curing agents in polyurethane manufacture
Inventors:
David W. House, Ray V. Scott, Jr.
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Jun 6, 1986
Inventors
David W. House
Ray V. Scott, Jr.
Assignee (at issue)
UOP LLC
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.