Mixture of cationic benzene carboxylate polymers from the reaction of haloacetyl terminated poly(ether-esters) with terminal quaternizing agents

Granted: Oct 10, 1989 Filed: Jun 16, 1988

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.