Granted Patent
Utility
US 5,200,464 · App. 07/631,846
Water-soluble radical-curing polyvinyl alcohol derivative
Inventors:
Akihisa Furuno, Susumu Harashima
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Dec 21, 1990
Inventors
Akihisa Furuno
Susumu Harashima
Assignee (at issue)
Nitto Chemical Industry Co., 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.