Granted Patent
Utility
US 5,098,907 · App. 07/469,054
Powdery pharmaceutical composition containing benzoyl urea, a dispersant and silicic acid
Inventors:
Nobuo Kondo, Masahiro Kikuchi, Tsunetaka Nakajima, Masahiro Watanabe, Kouichi Yamauchi, Takahiro Haga, Nobutoshi Yamada, Hideo Sugi, Toru Koyanagi
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Jan 23, 1990
Inventors
Nobuo Kondo
Masahiro Kikuchi
Tsunetaka Nakajima
Masahiro Watanabe
Kouichi Yamauchi
Takahiro Haga
Nobutoshi Yamada
Hideo Sugi
Toru Koyanagi
Assignees (at issue)
ISHIHARA SANGYO KAISHA, LTD.
Green Cross Corporation
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.