Granted Patent
Utility
US 4,802,957 · App. 06/850,527
Method for measuring the water content of a solid sample using Karl Fischer's coulometric titration
Inventors:
Sinichi Kuwata, Hiromasa Katoh, Mitsumasa Ono
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Apr 10, 1986
Inventors
Sinichi Kuwata
Hiromasa Katoh
Mitsumasa Ono
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.