Granted Patent
Utility
US 4,728,720 · App. 07/000,027
Polyesters of trans-4,4'-stilbenedicarboxylic acid, ethylene glycol, and 1,4-butanediol
Inventors:
John C. Morris, Winston J. Jackson, Jr.
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Jan 2, 1987
Inventors
John C. Morris
Winston J. Jackson, 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.