Granted Patent
Utility
US 5,868,964 · App. 07/778,458
Caustic-stable modified polycarboxylate compound and method of making the same
Inventors:
Donald Borseth, David McCall
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Oct 16, 1991
Inventors
Donald Borseth
David McCall
Assignee (at issue)
DIVERSEY, 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.