Granted Patent
Utility
US 4,496,468 · App. 06/362,672
Hydrated hydroxyethyl cellulose compositions
Inventors:
Roy F. House, Lonnie D. Hoover
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Mar 29, 1982
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.