Granted Patent
Utility
US 5,164,433 · App. 07/686,473
Rheological agents and thickeners
Inventors:
Anthony Ricci, Alfred J. Whitton, Hemi N. Nae
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Apr 17, 1991
Inventors
Anthony Ricci
Alfred J. Whitton
Hemi N. Nae
Assignee (at issue)
Rheox 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.