Granted Patent
Utility
US 4,615,740 · App. 06/709,547
Liquid polymer containing compositions for thickening aqueous mediums
Inventors:
James A. Pelezo, Garry E. Corbett, Jr., Don Siems
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Mar 8, 1985
Inventors
James A. Pelezo
Garry E. Corbett, Jr.
Don Siems
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.