Granted Patent
Utility
US 6,498,159 · App. 09/508,197
Phthalazine derivatives and remedies for erectile dysfunction
Inventors:
Nobuhisa Watanabe, Norio Karibe, Kazuki Miyazaki, Fumihiro Ozaki, Atsushi Kamada, Shuhei Miyazawa, Yoshimitsu Naoe, Toshihiko Kaneko, Itaru Tsukada, Tadashi Nagakura, Hiroki Ishihara, Kohtarou Kodama, Hideyuki Adachi
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Mar 8, 2000
Inventors
Nobuhisa Watanabe
Norio Karibe
Kazuki Miyazaki
Fumihiro Ozaki
Atsushi Kamada
Shuhei Miyazawa
Yoshimitsu Naoe
Toshihiko Kaneko
Itaru Tsukada
Tadashi Nagakura
Hiroki Ishihara
Kohtarou Kodama
Hideyuki Adachi
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.