Granted Patent
Utility
US 5,786,352 · App. 08/621,360
Cyclic compounds, their production and use
Inventors:
Hideaki Natsugari, Takenori Ishimaru, Takayuki Doi, Yoshinori Ikeura, Chiharu Kimura
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Mar 25, 1996
Inventors
Hideaki Natsugari
Takenori Ishimaru
Takayuki Doi
Yoshinori Ikeura
Chiharu Kimura
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.