Granted Patent
Utility
US 5,204,417 · App. 07/929,667
High strength polymers and blends of hydroquinone poly(iso-terephthalates) containing residues of p-hydroxybenzoic acid
Inventors:
Brian A. Stern, Markus Matzner, Richard Layton, Paul J. Huspeni, Paul D. Frayer, James W. Cleary
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Aug 13, 1992
Inventors
Brian A. Stern
Markus Matzner
Richard Layton
Paul J. Huspeni
Paul D. Frayer
James W. Cleary
Assignee (at issue)
Amoco 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.