Granted Patent
Utility
US 6,437,164 · App. 09/869,865
Process for the preparation of phosphonite compounds
Inventors:
Masataka Yamamoto, Masahiro Kasagi, Takashi Yokomatsu, Akio Mishima, Yoshihiro Ozaki
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Jul 6, 2001
Inventors
Masataka Yamamoto
Masahiro Kasagi
Takashi Yokomatsu
Akio Mishima
Yoshihiro Ozaki
Assignee (at issue)
Yoshitomi Fine Chemicals, 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.