Granted Patent
Utility
US 4,652,591 · App. 06/797,303
Reaction products of terephthalic acid residues and polycarboxylic acid-containing polyols and polymeric foams obtained therefrom
Inventor:
Michael E. Londrigan
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Nov 12, 1985
Inventor
Michael E. Londrigan
Assignee (at issue)
Jim Walter Resources, Inc.
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.