Granted Patent
Utility
US 6,121,309 · App. 09/125,522
Fused-ring carboxylic acid derivatives
Inventors:
Katsuya Tagami, Hiroyuki Yoshimura, Mitsuo Nagai, Shigeki Hibi, Kouichi Kikuchi, Takashi Sato, Makoto Okita, Yasushi Okamoto, Yumiko Nagasaka, Naoki Kobayashi, Takayuki Hida, Kenji Tai, Naoki Tokuhara, Seiichi Kobayashi
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Aug 20, 1998
Inventors
Katsuya Tagami
Hiroyuki Yoshimura
Mitsuo Nagai
Shigeki Hibi
Kouichi Kikuchi
Takashi Sato
Makoto Okita
Yasushi Okamoto
Yumiko Nagasaka
Naoki Kobayashi
Takayuki Hida
Kenji Tai
Naoki Tokuhara
Seiichi Kobayashi
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.