Granted Patent
Utility
US 5,571,889 · App. 08/450,117
Polymer containing monomer units of chemically modified polyaspartic acids or their salts and process for preparing the same
Inventors:
Toshio Katoh, Akinori Nagatomo, Hiroaki Tamatani, Masanobu Ajioka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Nov 5, 1996
Filed: May 25, 1995
Inventors
Toshio Katoh
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.