1
James D Mayo, James M Duff, Cheng K Hsiao, Sandra J Gardner, Barkev Keoshkerian: Hydroxygallium phthalocyanine imaging members and processes. Xerox Corporation, E O Palazzo, December 5, 1995: US05473064 (161 worldwide citation)

A process for the preparation of hydroxygallium phthalocyanine which comprises hydrolysis of halogallium phthalocyanine precursor to a hydroxygallium phthalocyanine, and conversion of said resulting hydroxygallium phthalocyanine to Type V hydroxygallium phthalocyanine by contacting said resulting hy ...


2
Barkev Keoshkerian, George Liebermann, Cheng Kuo Hsiao, James D Mayo, Dasarao K Murti, Sandra J Gardner: Method of making hydroxygallium phthalocyanine type V photoconductive imaging members. Xerox Corporation, E D Palazzo, January 9, 1996: US05482811 (145 worldwide citation)

A process for the preparation of hydroxygallium phthalocyanines which comprises hydrolyzing a gallium phthalocyanine precursor pigment by dissolving said hydroxygallium phthalocyanine in a strong acid and then reprecipitating the resulting dissolved pigment in basic aqueous media; removing any ionic ...


3
Richard A Burt, Cheng Kuo Hsiao, Dasarao Murti, Roger E Gaynor, Barkev Keoshkerian, James D Mayo, George Liebermann: Processes for the preparation of hydroxygallium phthalocyanine. Xerox Corporation, E O Palazzo, May 28, 1996: US05521306 (126 worldwide citation)

A process for the preparation of Type V hydroxygallium phthalocyanine which comprises the in situ formation of an alkoxy-bridged gallium phthalocyanine dimer, hydrolyzing said alkoxy-bridged gallium phthalocyanine dimer to hydroxygallium phthalocyanine, and subsequently converting the hydroxygallium ...


4
Francoise M Winnik, Barkev Keoshkerian: Ink jet inks containing colored silica particles. Xerox Corporation, Judith L Byorick, October 31, 1989: US04877451 (118 worldwide citation)

An ink jet ink composition which comprises water, a solvent, and a plurality of colored particles comprising hydrophilic porous silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents. The particles are prepared by a process which copmrises reacting hydro ...


5
Francoise M Winnik, Barkev Keoshkerian, Raymond W Wong, Stephan Drappel, Melvin D Crocher, James D Mayo, Peter G Hofstra: Inks and liquid developers containing colored silica particles. Xerox Corporation, Judith L Byorick, January 3, 1995: US05378574 (76 worldwide citation)

Ink jet inks and liquid developers are disclosed which contain colored particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents. The ink jet inks generally comprise a liquid medium and a plurality of the colored silica part ...


6
Barkev Keoshkerian, Michael K Georges, Stephan V Drappel: Ink jettable toner compositions and processes for making and using. Xerox Corporation, John L Haack, August 13, 1996: US05545504 (70 worldwide citation)

A process for the preparation of toner compositions comprising: forming a mixture comprised of at least one free radical reactive monomer, a colorant, a stabilizer compound containing a stable free radical reactive group, and a liquid vehicle; and heating the mixture from about 75.degree. to about 2 ...


7
Beng S Ong, Barkev Keoshkerian, Giuseppa Baranyi: Photoconductive imaging members with N,N-bis(biarylyl)aniline charge transport polymers. Xerox Corporation, E O Palazlo, June 26, 1990: US04937165 (48 worldwide citation)

A photoconductive imaging member comprised of a photogenerating layer, and a charge transport layer comprised of the N,N-bis(biarylyl)aniline charge transport polymers of the formula ##STR1## wherein A and B are independently selected from bifunctional linkages; Z is alkylenedioxy, arylenedioxy, or ...


8
Barkev Keoshkerian, Michael K Georges, Stephan V Drappel: Ink jettable toner compositions and processes for making and using. Xerox Corporation, John L Haack, February 3, 1998: US05714993 (44 worldwide citation)

A process for the preparation of toner compositions comprising: forming a mixture comprised of at least one free radical reactive monomer, a colorant, a stabilizer compound containing a stable free radical reactive group, and a liquid vehicle; and heating the mixture from about 75.degree. to about 2 ...


9
Beng S Ong, Barkev Keoshkerian, Dasarao K Murti, Joseph Mammino: Photoresponsive imaging members containing electron transport overcoatings. Xerox Corporation, E O Palazoo, December 31, 1985: US04562132 (37 worldwide citation)

Disclosed is an imaging member comprised of a supporting substrate, a hole transport layer comprised of an arylamine hole transporting substance dispersed in an inactive resinous binder, a photogenerating layer comprised of a photogenerating pigment optionally dispersed in a resinous binder, and as ...


10
Beng S Ong, Barkev Keoshkerian, Giuseppa Baranyi, Dasarao K Murti: Photoconductive imaging members with diaryl biarylylamine copolymer charge transport layers. Xerox Corporation, E O Palazzo, J L Byoriuk, September 25, 1990: US04959288 (36 worldwide citation)

A photoconductive imaging member comprised of a photogenerating layer, and a charge transport layer comprised of diaryl biarylylamine copolymers of the formula ##STR1## wherein A and B are independently selected from bifunctional linkages; Z is alkylenedioxy, arylenedioxy, or substituted derivatives ...