Granted Patent
Utility
US 4,742,165 · App. 06/865,566
2-piperazinopyrimidine derivatives
Inventors:
Keiichi Yokoyama, Tatsuyoshi Ishida, Shigeru Isayama, Kohji Kato, Takumi Kitahara, Yoshiaki Furuya
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 2, 1986
Inventors
Keiichi Yokoyama
Tatsuyoshi Ishida
Shigeru Isayama
Kohji Kato
Takumi Kitahara
Yoshiaki Furuya
Assignee (at issue)
Mitsui Petrochemical 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.