Granted Patent
Utility
US 4,755,617 · App. 07/031,709
Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid
Inventors:
Tohru Miura, Teruyuki Nagata, Hideki Mizuta
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Mar 30, 1987
Inventors
Tohru Miura
Teruyuki Nagata
Hideki Mizuta
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.