Granted Patent
Utility
US 5,147,967 · App. 07/499,483
High strength polymer of hydroquinone poly(iso-terephthalate) 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: Sep 15, 1992
Filed: Jun 4, 1990
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.