Granted Patent
Utility
US 4,803,241 · App. 07/075,374
Condensation polymers containing styrylbenzazole ultraviolet radiation-absorbing residues and shaped articles produced therefrom
Inventors:
Max A. Weaver, Wayne P. Pruett, Samuel D. Hilbert, Robert D. Burpitt
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Jul 20, 1987
Inventors
Max A. Weaver
Wayne P. Pruett
Samuel D. Hilbert
Robert D. Burpitt
Assignee (at issue)
EASTMAN KODAK 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.