Granted Patent
Utility
US 4,870,167 · App. 07/020,876
Hydrophobically modified non-ionic polygalactomannan ethers
Inventors:
George M. Zody, Michael E. Morgan
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Mar 2, 1987
Inventors
George M. Zody
Michael E. Morgan
Assignee (at issue)
Hi-Tek Polymers, 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.