Granted Patent
Utility
US 5,698,629 · App. 08/698,952
Process for the preparation of a water-in-oil type high-molecular-weight polymer emulsion
Inventors:
Susumu Seki, Wataru Fujii
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Aug 16, 1996
Inventors
Susumu Seki
Wataru Fujii
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.