Zbigniew Y Tokarski

US Patent:

6340548, Jan 22, 2002

Filed:

Mar 16, 2000

Appl. No.:

09/526789

Inventors:

Nusrallah Jubran - Saint Paul MN
Zbigniew Tokarski - Woodbury MN
Terrance P. Smith - Woodbury MN

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G03G 5047

US Classification:

430 5845, 430 56, 430 586, 430 79, 399162, 548440, 548444

Abstract:

Organic photoreceptors that include a charge transport compound, a charge generating compound, and an electroconductive support in which the charge transport compound is a novel aryl hydrazone-functional carbazole compound.

US Patent:

6673499, Jan 6, 2004

Filed:

Oct 23, 2001

Appl. No.:

10/003466

Inventors:

Nam Jeong Lee - Seoul, KR
Zbigniew Tokarski - Woodbury MN
Kam Wah Law - Woodbury MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 510

US Classification:

430 571, 430 62, 430117, 252511, 524495, 399162

Abstract:

An organophotoreceptor comprising (a) at least one photoconductive element capable of retaining an electrophotographic latent image; (b) an electrically conductive substrate having an electrically conductive surface; (c) an electrically conductive ground stripe adjacent to the photoconductive element and in electrical contact with the electrically conductive substrate, wherein the electrically conductive ground stripe comprising a film forming binder, conductive particles, inorganic particles having a Mohs hardness greater than 5, and a surfactant; (d) at least a charge transport compound; and (e) at least a charge generating compound.

US Patent:

6689523, Feb 10, 2004

Filed:

Oct 31, 2002

Appl. No.:

10/284585

Inventors:

Kam W. Law - Woodbury MN
Nusrallah Jubran - St. Paul MN
Zbigniew Tokarski - Woodbury MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 5047

US Classification:

430 5835, 430 586, 430 79, 430117, 548440

Abstract:

This invention relates to an organophotoreceptor that includes: (a) a charge transport compound having the formula âwhere R and R are, independently, a carbazolyl group; R and R are, independently, hydrogen, an alkyl group, an aryl group, or a heterocyclic group; and X is a sulfonyldiphenylene group; (b) a charge generating compound; and (c) an electrically conductive substrate.

US Patent:

6696209, Feb 24, 2004

Filed:

Nov 6, 2002

Appl. No.:

10/289233

Inventors:

Kam W. Law - Woodbury MN
Nusrallah Jubran - St. Paul MN
Zbigniew Tokarski - Woodbury MN
Ritu Jain - Gainesville FL
Anatoily Vakulenko - Gainesville FL

Assignee:

Samsung Electronics Co. Ltd. - Suwon

International Classification:

G03G 5047

US Classification:

430 5835, 430 72, 564310

Abstract:

An organophotoreceptor that includes: (a) a charge transport compound having the formula âwhere R and R are, independently, a fluorenyl group; R and R are, independently, hydrogen, an alkyl group, an aryl group, or a heterocyclic group; and X is a sulfonyldiphenylene group; (b) a charge generating compound; and (c) an electrically conductive substrate.

US Patent:

6749978, Jun 15, 2004

Filed:

May 30, 2003

Appl. No.:

10/449554

Inventors:

Nusrallah Jubran - St. Paul MN
Zbigniew Tokarski - Woodbury MN
Kam Law - Woodbury MN
Vytautas Getautis - Kaunas, LT
Jonas Sidaravicius - Vilnius, LT
Osvaldas Paliulis - Kaunas, LT
Valentas Gaidelis - Vilnius, LT
Vygintas Jankauskas - Vilnius, LT

Assignee:

Samsung Electronics Co., Ltd. - Kyungki-Do

International Classification:

G03G 1502

US Classification:

430 586, 430 584, 548416

Abstract:

Charge transport compounds are described that have a multiple number of hydrazone-bridged heterocyclic groups (especially julolidine groups, carbazole groups, triarylamine groups and (N,N-disubstituted)arylamine groups such as dialkarylamine groups (e. g. dimethylphenylamine; methylethylphenylamine, dipropylphenylamine, ethylepropylphenylamine, ethylbutylnaphthylamine, etc. ), alkyldiarylamine groups (e. g. methyldiphenylamino, ethyldiphenylamino, etc), and triarylamino groups (e. g. , triphenyl amino, trinaphthylamino, etc)) connected by a central bridging group. An example of charge transport compounds are those having the following generic formula: wherein R is selected from the group consisting of julolidine ring groups, carbazole ring groups, and and (N,N-disubstituted)arylamine groups; Q comprises an aromatic hydrazone linking group, such as Y comprises a bridging group between RâQâ groups, such as a bond, carbon atom, nitrogen atom, oxygen atom, sulfur atom, a methylene group; Z is an aryl group, preferably a phenyl group or naphthyl group; X is a linking group, preferably a methylene group, and for example having the formula â(CH ) â (branched or linear), where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups is optionally replaced by an oxygen atom, a carbonyl group, urethane, urea, an ester group, a âNR group, a CHR group, or a CR R group where R , R , R , and R are, independently, H, an alkyl group, or aryl group; and n is an integer between 2 and 6, inclusive. An organic photoreceptor includes that compound and (b) a charge generating compound; and (c) an electrically conductive substrate.

US Patent:

6768010, Jul 27, 2004

Filed:

Sep 16, 2003

Appl. No.:

10/663970

Inventors:

Zbigniew Tokarski - Woodbury MN
Nusrallah Jubran - St. Paul MN
Vytautas Getautis - Kaunas, LT
Maryte Daskeviciene - Jonava, LT
Edmundas Montrimas - Vilnius, LT
Valentas Gaidelis - Vilnius, LT

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

C07D20986

US Classification:

548444, 546100, 549551, 430 5845, 430 78, 430 79

Abstract:

Organophotoreceptors comprise an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: a) a charge transport compound having the formula where R and R are, independently, hydrogen, an alkyl group, a heterocyclic group, an alkaryl group or an aryl group; X is an aromatic group; Y is an (N,N-disubstituted) arylamine group, such as a (N,N-disubstituted) arylamine group, a carbazole group or a julolidine group; Z is (CH ) group where m is an integer between 1 and 30 where one or more of the methylene groups is optionally replaced by O, S, C O, O CâO, O CâNR , sulfoxide, sulfate, phosphate, an aryl group, urethane, urea, a NR group, a CHR group, or a CR R group where R , R , R , R , and R are, independently, H, hydroxyl, thiol, an amine group, an alkyl group, a heterocyclic group, an alkaryl group, or an aryl group; and E is an epoxy group; and (b) a charge generating compound.

US Patent:

6815132, Nov 9, 2004

Filed:

Dec 24, 2002

Appl. No.:

10/328697

Inventors:

Jiayi Zhu - Woodbury MN
Zbigniew Tokarski - Woodbury MN
James A. Baker - Hudson WI
Ronald J. Moudry - Woodbury MN
David T. Ask - Somerset WI
Nusrallah Jubran - St. Paul MN
Kam W. Law - Woodbury MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 506

US Classification:

430 5845, 430 595, 540141

Abstract:

A crystalline phase of titanyl oxyphthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl oxyphthalocyanine. The S-phase is a truly new phase, and not a mixture of particles of various phases (e. g. , combinations of the beta-phase and the gamma-phase), with internal lattice distributions of atoms and molecules forming a new, non-continuous, non-uniform lattice structure. The x-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl oxyphthalocyanine, but can now be provided in a single crystalline form. The visible spectra show significant absorption differences. The novel S-form titanyl oxyphthalocyanine is also used in a photoconductor displaying major peaks of Braggs 2 theta angle to the CuK-alpha characteristic X-ray (wavelength 1.

US Patent:

6815133, Nov 9, 2004

Filed:

Mar 6, 2003

Appl. No.:

10/382393

Inventors:

Kam W. Law - Woodbury MN
Nusrallah Jubran - St. Paul MN
Zbigniew Tokarski - Woodbury MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 5047

US Classification:

430 5845, 430 72, 430117, 564251

Abstract:

This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where the average n is between 1 and 1000; R and R are, independently, hydrogen, a branched or linear alkyl group (e. g. , a C -C alkyl group), a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group (e. g. a cyclohexyl group), or an aryl group (e. g. , a phenyl or naphthyl group); X is a bis(fluorene-4-carboxyl)alkane group; Y is a divalent sulfonyldiphenylene group; Z is X O where X is double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N; and Q is O or NâN(R )âYâN(R )âNH ; (b) a charge generating compound; and (c) an electrically conductive substrate over which said charge transport composition and said charge generating compound are located.