Granted Patent
Utility
US 4,734,418 · App. 06/805,905
Quinazoline compounds and antihypertensives
Inventors:
Keiichi Yokoyama, Koji Kato, Takumi Kitahara, Hiroyasu Ohno, Takashi Nishina, Mikio Kumakura, Akira Awaya, Takuo Nakano, Kazuyuki Watanabe, Sakae Saruta
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Dec 6, 1985
Inventors
Keiichi Yokoyama
Koji Kato
Takumi Kitahara
Hiroyasu Ohno
Takashi Nishina
Mikio Kumakura
Akira Awaya
Takuo Nakano
Kazuyuki Watanabe
Sakae Saruta
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.