Granted Patent
Utility
US 4,686,051 · App. 06/637,971
Method of increasing the rate of hydration of activated hydroxyethyl cellulose compositions
Inventors:
Roy F. House, Lonnie D. Hoover
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Aug 6, 1984
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.