Granted Patent
Utility
US 5,792,869 · App. 08/552,089
Process for preparing optically active piperazine derivatives and Intermediates for preparation
Inventors:
Hisamichi Murakami, Shoko Satoh, Tadashi Tobiyama, Ken'ichi Sakai, Hiroyuki Nohira
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Nov 2, 1995
Inventors
Hisamichi Murakami
Shoko Satoh
Tadashi Tobiyama
Ken'ichi Sakai
Hiroyuki Nohira
Assignee (at issue)
Yamakawa Chemical Industry 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.