Granted Patent
Utility
US 5,250,549 · App. 07/742,618
Sulfonamide derivatives
Inventors:
Hiroshi Yoshino, Norihiro Ueda, Hiroyuki Sugumi, Jun Niijima, Yoshihiko Kotake, Toshimi Okada, Nozomu Koyanagi, Tatsuo Watanabe, Makoto Asada, Kentaro Yoshimatsu, Atsumi Iijima, Takeshi Nagasu, Kappei Tsukahara, Kyosuke Kitoh
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Aug 8, 1991
Inventors
Hiroshi Yoshino
Norihiro Ueda
Hiroyuki Sugumi
Jun Niijima
Yoshihiko Kotake
Toshimi Okada
Nozomu Koyanagi
Tatsuo Watanabe
Makoto Asada
Kentaro Yoshimatsu
Atsumi Iijima
Takeshi Nagasu
Kappei Tsukahara
Kyosuke Kitoh
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.