Granted Patent
Utility
US 4,921,863 · App. 07/177,662
Cyclic amine derivatives
Inventors:
Hachiro Sugimoto, Takaharu Nakamura, Norio Karibe, Isao Saito, Kunizou Higurashi, Masahiro Yonaga, Takeru Kaneko, Takahiro Nakazawa, Masataka Ueno, Kiyomi Yamatsu
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Feb 17, 1988
Inventors
Hachiro Sugimoto
Takaharu Nakamura
Norio Karibe
Isao Saito
Kunizou Higurashi
Masahiro Yonaga
Takeru Kaneko
Takahiro Nakazawa
Masataka Ueno
Kiyomi Yamatsu
Assignee (at issue)
Eisai Inc.
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.