1
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 ...


2
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 ...


3
James M Duff, James D Mayo, Cheng Kuo Hsiao, Ah Mee Hor, Terry L Bluhm, Gordon K Hamer, Peter M Kazmaier: Processes for the preparation of titanium phthalocyanines. Xerox Corporation, E O Palazzo, November 24, 1992: US05166339 (90 worldwide citation)

Disclosed are various titanyl phthalocyanine polymorphs such as Type I, Type II, Type III, Type IV, Type Z-1, Type Z-2, and Type X, which phthalocyanines can be prepared by dissolving a titanyl phthalocyanine in a solution of trifluoroacetic acid and a chlorinated hydrocarbon. There is then added to ...


4
Beng S Ong, Ping Liu, Cheng Kuo Hsiao, Huoy Jen Yuh, John S Chambers, Damodar M Pai, Markus R Silvestri, Kathleen M Carmichael: Photoconductive imaging members. Xerox Corporation, E O Palazzo, September 11, 2001: US06287737 (44 worldwide citation)

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl poly ...


5
Rafik O Loutfy, Ah Mee Hor, George Liebermann, Alan J Toth, Cheng Kuo Hsiao, Kathleen M Carmichael, Emery G Tokoli: Photoconductive imaging members with mixtures of photogenerator pigment compositions. Xerox Corporation, E O Palazzo, November 21, 1989: US04882254 (35 worldwide citation)

A layered photoresponsive imaging member comprised of a supporting substrate; a photogenerator layer comprised of a mixture of first and second pigments; and an aryl amine hole transport layer, said mixture comprised of perylenes and phthalocyanines; polycyclic quinones and phthalocyanines; and peri ...


6
Yu Qi, Nan Xing Hu, Ah Mee Hor, Cheng Kuo Hsiao, Yvan Gagnon, John F Graham: Process of making hydrophobic metal oxide nanoparticles. Xerox Corporation, Oliff & Berridge, July 25, 2006: US07081234 (28 worldwide citation)

A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The treated metal oxide nanoparticles are rendered hydrophobic by the surface treatment agent being surface a ...


7
Rafik O Loutfy, Cheng Kuo Hsiao: Photoconductive devices containing perylene dye compositions. Xerox Corporation, E O Palazzo, April 30, 1985: US04514482 (27 worldwide citation)

This invention relates to improved photoresponsive devices including, for example, those comprised of (1) a supporting substrate, and (2) a photoconductive layer comprised of perylene dye compositions of the following formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are independently selected ...


8
Nancy A Listigovers, Charles G Allen, Trevor I Martin, Gordon K Hamer, Cheng Kuo Hsiao, Giuseppa Baranyi: Hydroxygallium phthalocyanine pigments with block copolymer binders. Xerox Corporation, E O Palazzo, May 28, 1996: US05521043 (18 worldwide citation)

A photoconditive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a photogenerating pigment, or photogenerating pigments dispersed in a polystyrene/poly(methacrylic acid) (A.sub.n -B.sub.m) block copolymer wherein A is the anchoring block, B is the steric stab ...


9
Beng S Ong, Ping Liu, Cheng Kuo Hsiao: Photoconductive imaging members. Xerox Corporation, E O Palazzo, February 16, 1999: US05871877 (16 worldwide citation)

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer material schematically represented by structure (VII), and is derived ...


10
Ping Liu, Nan Xing Hu, H Bruce Goodbrand, Cheng Kuo Hsiao, Beng S Ong: Photoconductive imaging members. Xerox Corporation, E O Palazo, February 23, 1999: US05874193 (16 worldwide citation)

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked siloxane polymer schematically represented by ##STR1## wherein A, B, and C ar ...