Granted Patent
Utility
US 5,112,400 · App. 07/489,195
Clay thickener for use in water-based systems and joint compounds containing such compositions
Inventors:
Hemi N. Nae, Wei-Ming Cheng, Michael A. Desesa
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Mar 6, 1990
Inventors
Hemi N. Nae
Wei-Ming Cheng
Michael A. Desesa
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.