Granted Patent
Utility
US 4,814,507 · App. 07/095,766
Arylsulfone compounds as anti-ulcer agents
Inventors:
Akihiro Tobe, Shinichiro Fujimori, Tomoshi Yamazaki, Mamoru Sugano, Ryoji Kikumoto, Issei Nitta
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Sep 14, 1987
Inventors
Akihiro Tobe
Shinichiro Fujimori
Tomoshi Yamazaki
Mamoru Sugano
Ryoji Kikumoto
Issei Nitta
Assignee (at issue)
Mitsubishi 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.