Granted Patent
Utility
US 4,758,607 · App. 06/756,107
Distilled products of polyethylene terephthalate polymers and polycarboxylic acid-containing polyols and polymeric foams obtained therefrom
Inventors:
Richard K. Hallmark, Ernest K. Moss
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Jul 18, 1985
Inventors
Richard K. Hallmark
Ernest K. Moss
Assignee (at issue)
Sloss Industries 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.