Granted Patent
Utility
US 4,427,556 · App. 06/196,367
Dispersible hydrophilic polymer compositions
Inventors:
Roy F. House, Lonnie D. Hoover
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Oct 14, 1980
Inventors
Roy F. House
Lonnie D. Hoover
Assignee (at issue)
NL Industries, Inc.
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.