Granted Patent
Utility
US 5,374,419 · App. 07/994,069
Ultraviolet light-absorbing compounds and sunscreen formulations and polymeric materials containing such compounds or residues thereof
Inventors:
James J. Krutak, Max A. Weaver, Clarence A. Coates, Jr., Samuel D. Hilbert, Terry Ann Oldfield, William W. Parham, Wayne P. Pruett
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Dec 18, 1992
Inventors
James J. Krutak
Max A. Weaver
Clarence A. Coates, Jr.
Samuel D. Hilbert
Terry Ann Oldfield
William W. Parham
Wayne P. Pruett
Assignee (at issue)
Eastman 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.