Nova Patents
EP0343924A3

Liquid developer compositions

Abstract

Disclosed is an electrophotographic liquid developer composition comprising a liquid medium, first toner particles able to be charged to one polarity and comprising a first dye and polymeric cores to which steric stabilizer polymers have been attached, second toner particles able to be charged to a polarity opposite to that of the first toner particles and comprising a second dye of a different color from that of the first dye and polymeric cores to which steric stabilizer polymers have been attached, and a charge director. The disclosed developer is suitable for developing electrostatic latent images in two different colors in a single development step. The latent image comprises three areas of charge; toner particles of one color are selectively attracted to one area, toner particles of the other color are selectively attracted to the second area, and the third area remains undeveloped as a background area.

Term

Term ended

Projected expiry passed 23 May 2009, 17.3 years ago.

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Citations
DocumentRelationOfficeCategoryCited during
US3990980ACitesUnited States of AmericaASearch report
US4476210ACitesUnited States of AmericaADSearch report