Granted Patent
Utility
US 4,734,500 · App. 06/838,569
O-aminoalkylene (or aminoalkyleneoxy) phenylsulfone compounds having anti-ulcer effect
Inventors:
Akihiro Tobe, Shinichiro Fujimori, Tomoshi Yamazaki, Mamoru Sugano, Ryoji Kikumoto, Issei Nitta
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Mar 11, 1986
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.