Granted Patent
Utility
US 5,935,963 · App. 08/669,375
Piperazinones, their production and use
Inventors:
Hideto Fukushi, Takehiko Naka, Zen-ichi Terashita, Toshio Miyawaki
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Jul 10, 1996
Inventors
Hideto Fukushi
Takehiko Naka
Zen-ichi Terashita
Toshio Miyawaki
Assignee (at issue)
Takeda Chemical Industries 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.