Granted Patent
Utility
US 6,359,040 · App. 09/309,289
Aqueous systems comprising an ionic polymer and a viscosity promoter, processes for their preparation, and uses thereof
Inventor:
Charles L. Burdick
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: May 11, 1999
Inventor
Charles L. Burdick
Assignee (at issue)
HERCULES LLC
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.