Granted Patent
Utility
US 5,608,005 · App. 08/504,999
Process for viscosifying water with carboxylic acid monomers polymerized in silicone solvents
Inventor:
Milan F. Sojka
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Jul 20, 1995
Inventor
Milan F. Sojka
Assignee (at issue)
AMCOL INTERNATIONAL CORPORATION
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.