R4 is an alkyl or alkylene group or an aryl or arylene group; R2 and R3, which can...http://www.google.com/patents/US6337358?utm_source=gb-gplus-sharePatent US6337358 - Particles with attached groups for toners and ink jetsAdvanced Patent SearchPublication numberUS6337358 B1Publication typeGrantApplication numberUS 09/181,926Publication dateJan 8, 2002Filing dateOct 29, 1998Priority dateOct 31, 1