Granted Patent
Utility
US 4,847,429 · App. 07/081,209
Synthesis of phenylhydroquinones
Inventors:
Carl M. Lentz, Bruce L. Gustafson, Dale E. Van Sickle, Joseph Stanton Bowers, Jr.
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Aug 3, 1987
Inventors
Carl M. Lentz
Bruce L. Gustafson
Dale E. Van Sickle
Joseph Stanton Bowers, Jr.
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.