(I) and (II): ##STR1## wherein each of R1, R2, Ar1 and Ar2 is a substituted or unsubstituted alkyl group, or...http://www.google.com/patents/US5166030?utm_source=gb-gplus-sharePatent US5166030 - Electrostatic image-developing toner containing a quaternary ammonium charge controlling agentAdvanced Patent SearchPublication numberUS5166030 APublication typeGrantApplication numberUS 07/757,211Publica