Granted Patent
Utility
US 5,334,754 · App. 07/930,890
Process for preparing 2,5-diphenylterephthalic acid by oxidation
Inventors:
Charles Edwan Sumner, Jr., Bruce L. Gustafson, Ernest Arnold, Eric J. Fugate, Dewey W. Fuller, Jr.
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Aug 14, 1992
Inventors
Charles Edwan Sumner, Jr.
Bruce L. Gustafson
Ernest Arnold
Eric J. Fugate
Dewey W. Fuller, Jr.
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.