Granted Patent
Utility
US 4,517,387 · App. 06/536,029
Process for production of 2,2-bis(4-hydroxyphenyl) propane
Inventors:
Fujihisa Matsunaga, Tadahiko Nishimura, Etsuo Miyake, Kiyotaka Banba
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Sep 26, 1983
Inventors
Fujihisa Matsunaga
Tadahiko Nishimura
Etsuo Miyake
Kiyotaka Banba
Assignees (at issue)
Mitsui Petrochemical Industries, Ltd.
Honshu Chemical Ind. Co., 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.