Granted Patent
Utility
US 5,089,622 · App. 07/443,577
(-)-2-pyrazoline compounds and therapeutic agent for cerebrovascular disorders containing the same as effective ingredient
Inventors:
Seitaro Kajiya, Hajime Iizuka, Kunio Okumura, Junya Fujiwara, Norio Ohto, Hiroshi Kawazura, Yasuhiro Takahashi, Yoshio Shiga
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Nov 30, 1989
Inventors
Seitaro Kajiya
Hajime Iizuka
Kunio Okumura
Junya Fujiwara
Norio Ohto
Hiroshi Kawazura
Yasuhiro Takahashi
Yoshio Shiga
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.