Granted Patent
Utility
US 5,276,128 · App. 07/780,493
Salts of polybenzazole monomers and their use
Inventors:
Steven Rosenberg, Richard C. Krauss, Ming-Biann Liu, Luke R. Kleiss
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Oct 22, 1991
Inventors
Steven Rosenberg
Richard C. Krauss
Ming-Biann Liu
Luke R. Kleiss
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.