Granted Patent
Utility
US 4,670,164 · App. 06/847,946
Liquid polymer containing compositions for thickening aqueous systems
Inventors:
Kenneth Watson, Keith W. Sharp
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Apr 3, 1986
Inventors
Kenneth Watson
Keith W. Sharp
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.