Granted Patent
Utility
US 4,539,341 · App. 06/582,348
Digestion products of polyalkylene terephthalate polymers and polycarboxylic acid-containing polyols and polymeric foams obtained therefrom
Inventors:
Richard K. Hallmark, Michael J. Skowronski, William D. Stephens
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Feb 22, 1984
Inventors
Richard K. Hallmark
Michael J. Skowronski
William D. Stephens
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.