Granted Patent
Utility
US 5,484,945 · App. 08/288,454
Preparation process of polysuccinimide
Inventors:
Akinori Nagatomo, Hiroaki Tamatani, Masanobu Ajioka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Aug 10, 1994
Inventors
Akinori Nagatomo
Hiroaki Tamatani
Masanobu Ajioka
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.