IP Library Granted Patent US 5,792,869
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,792,869
App. No.
08/552,089
Filed
1995-11-02
Granted
1998-08-11
Kind
A