Granted Patent
Utility
US 4,898,941 · App. 07/083,815
Process for preparing diphenylalkene derivatives
Inventors:
Nobuo Kanda, Haruo Omura, Yukihiro Abe, Mitsuru Kondo
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Aug 11, 1987
Inventors
Nobuo Kanda
Haruo Omura
Yukihiro Abe
Mitsuru Kondo
Assignee (at issue)
Kanzaki Paper Manufacturing 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.