Granted Patent
Utility
US 4,582,944 · App. 06/606,611
Process for producing hydroxydiphenyl ethers
Inventors:
Katsuo Taniguchi, Hideo Nakamura, Terunori Fujita
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: May 3, 1984
Inventors
Katsuo Taniguchi
Hideo Nakamura
Terunori Fujita
Assignee (at issue)
Mitsui Petrochemical 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.