Granted Patent
Utility
US 4,782,104 · App. 07/054,503
Water-soluble polymer composition
Inventor:
Yasuyuki Nakanishi
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: May 27, 1987
Inventor
Yasuyuki Nakanishi
Assignee (at issue)
Mitsubishi Chemical Industries, 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.