Granted Patent
Utility
US 4,882,412 · App. 07/287,815
Polyester polymer containing the residue of the UV absorbing benzopyran compound and shaped articles produced therefrom
Inventors:
Max A. Weaver, Clarence A. Coates, Jr., Wayne P. Pruett, Samuel D. Hilbert
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Dec 21, 1988
Inventors
Max A. Weaver
Clarence A. Coates, Jr.
Wayne P. Pruett
Samuel D. Hilbert
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.