Granted Patent
Utility
US 5,190,636 · App. 07/602,230
Ion-sensitive film, method of producing the same and ion sensor
Inventors:
Norihiko Ushizawa, Shuichiro Yamaguchi, Naoto Uchida, Takeshi Shimomura
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Oct 24, 1990
Inventors
Norihiko Ushizawa
Shuichiro Yamaguchi
Naoto Uchida
Takeshi Shimomura
Assignee (at issue)
TERUMO KABUSHIKI KAISHA
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.