Granted Patent
Utility
US 4,251,433 · App. 05/924,022
Heterocyclic ester, ultraviolet stabilizers and their use in organic compositions
Inventors:
Gether Irick, Jr., Charles A. Kelly
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Jul 12, 1978
Inventors
Gether Irick, Jr.
Charles A. Kelly
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.