Granted Patent
Utility
US 4,238,600 · App. 06/095,852
Copolyesters derived from terephthalic acid, phenylhydroquinone and t-butylhydroquinone
Inventors:
Winston J. Jackson, Jr., Herbert F. Kuhfuss
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Nov 19, 1979
Inventors
Winston J. Jackson, Jr.
Herbert F. Kuhfuss
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.