Granted Patent
Utility
US 4,982,010 · App. 07/429,433
Method of producing 4-biphenyl p-tolyl ether
Inventors:
Naoki Hanayama, Kazuo Nakagawa, Akira Shimada
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Oct 31, 1989
Inventors
Naoki Hanayama
Kazuo Nakagawa
Akira Shimada
Assignee (at issue)
Yoshitomi Pharmaceutical Industries, Ltd.
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.