Granted Patent
Utility
US 4,987,067 · App. 07/279,105
Maltooligosaccharide derivatives and reagents for determination of amylase activity
Inventors:
Katsutoshi Ishimaru, Akira Shimada, Shinichi Teshima, Yuzo Hayashi
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Dec 2, 1988
Inventors
Katsutoshi Ishimaru
Akira Shimada
Shinichi Teshima
Yuzo Hayashi
Assignees (at issue)
Yoshitomi Pharmaceutical Industries, Ltd.
TOYO BOSEKI 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.