Xiaohe J Chen from 330 Bishop Dr, San Marcos, CA 92078, age 63

Pigment-Based Ink-Jet Ink Systems With Polyurethane Binder And Crashing Agent
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US Patent:

6908185, Jun 21, 2005
Filed:

Jun 11, 2003
Appl. No.:

10/460541
Inventors:

Xiaohe Chen - San Diego CA, US
George M. Sarkisian - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B41J002/01
US Classification:

347 96, 347100
Abstract:

The present invention is drawn toward systems, methods, and images printed on substrate. The system includes a porous media substrate, an ink-jet ink including a self-dispersed pigment and a polyurethane binder having acid value 20 to 100, wherein the ink-jet ink is configured for being printed on the porous media substrate, and a fixing fluid including a crashing agent, wherein the fixing fluid is configured for being overprinted or underprinted with respect to the ink-jet ink.

Self-Dispersed Pigment Mixtures For Ink-Jet Applications
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US Patent:

7501017, Mar 10, 2009
Filed:

Mar 1, 2005
Appl. No.:

11/070138
Inventors:

George Sarkisian - San Diego CA, US
Xiaohe Chen - San Diego CA, US
Dennis Guo - San Diego CA, US
Jodi Bates - Chelmsford MA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C09D 11/02
C09D 11/10
US Classification:

106 3189, 106 3113, 106 316, 106 3165
Abstract:

Compositions, systems, and methods of printing an ink-jet image are provided. The composition can be an ink-jet ink, comprising a liquid vehicle; from 0. 5 wt % to 10 wt % of a polymer-dispersed pigment; and from 0. 5 wt % to 10 wt % of a self-dispersed pigment selected from the group consisting of a second polymer-dispersed pigment and a small molecule-dispersed pigment.

Ink Formulations, Modified Pigment-Based Ink Formulations And Methods Of Making
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US Patent:

7563842, Jul 21, 2009
Filed:

Sep 30, 2005
Appl. No.:

11/240431
Inventors:

Zeying Ma - San Diego CA, US
Gregg A. Lane - San Diego CA, US
Yuan Yu - Westford MA, US
Xiaohe Chen - San Diego CA, US
George M. Sarkisian - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C08J 3/00
US Classification:

524522, 524555, 5253276, 106473, 106476, 106493
Abstract:

Briefly described, embodiments of this disclosure include ink formulation and modified pigments. One exemplary modified pigment, among others, includes a pigment A represented by the formula in FIG.

Ink Formulations, Modified Pigment-Based Ink Formulations And Methods Of Making
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US Patent:

7728062, Jun 1, 2010
Filed:

Jun 11, 2009
Appl. No.:

12/483185
Inventors:

Zeying Ma - San Diego CA, US
Gregg A. Lane - San Diego CA, US
Yuan Yu - Westford MA, US
Xiaohe Chen - San Diego CA, US
George M. Sarkisian - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C08J 3/00
US Classification:

524522, 524555, 5253276, 106473, 106476, 106493
Abstract:

Briefly described, embodiments of this disclosure include ink formulation and modified pigments. One exemplary modified pigment, among others, includes a pigment A represented by the formula in FIG.

Ink-Jet Inks And Ink Sets Exhibiting Reduced Bleed, Wicking, And/Or Halo Effect And Associated Methods
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US Patent:

8268064, Sep 18, 2012
Filed:

Sep 28, 2006
Appl. No.:

11/540140
Inventors:

Dennis P Parazak - Oceanside CA, US
Dennis Guo - San Diego CA, US
Xiaohe Chen - San Diego CA, US
Rodney Stramel - San Diego CA, US
Howard A. Doumaux - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C09D 11/02
G01D 11/00
US Classification:

106 316, 106 3175, 106 3186, 347100
Abstract:

Compositions, systems, and methods for ink-jet printing having improved black to color bleed control, reduced wicking, and/or reduced halo are described. The composition can include a functionalized carbon pigment dispersed in an ink vehicle. The carbon pigment includes functional groups chemically attached thereto. Suitable functional groups includes an aromatic ring structure having multiple carboxyl groups (or salts thereof) attached to the aromatic ring structure, wherein at least two of the multiple carboxyl groups are positioned on adjacent carbon atoms of the aromatic ring structure.

Ink Formulations, Modified Pigment-Based Ink Formulations And Methods Of Making
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US Patent:

8329814, Dec 11, 2012
Filed:

Mar 22, 2010
Appl. No.:

12/728976
Inventors:

Zeying Ma - San Diego CA, US
Gregg A. Lane - San Diego CA, US
Yuan Yu - Westford MA, US
Xiaohe Chen - San Diego CA, US
George M. Sarkisian - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C09D 11/10
C08K 9/00
C08L 31/02
C08F 8/00
US Classification:

524562, 524517, 524522, 524523, 524547, 524548, 524549, 524555, 524558, 524566, 524568, 524571, 524576, 528499, 106 3185, 106476, 106493, 347100
Abstract:

Briefly described, embodiments of this disclosure include ink formulation and modified pigments. One exemplary modified pigment, among others, includes a pigment A represented by the formula in FIG.

Ink Compositions For Ink-Jet Printing
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US Patent:

8492456, Jul 23, 2013
Filed:

Feb 9, 2004
Appl. No.:

10/775660
Inventors:

Xiaohe Chen - San Diego CA, US
George M. Sarkisian - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

C08F 220/04
C08G 18/08
C08G 18/28
C08G 18/80
C08G 73/10
C08J 3/00
C08K 3/20
C08K 5/05
C08K 5/34
C08K 5/48
C08K 5/3445
C08L 75/00
C09D 5/00
C09D 11/00
US Classification:

523160, 106 316, 106 3185, 347 1, 347 2, 347 85, 347 86, 347100, 523161, 524 86, 524104, 524106, 524379, 524386, 524589, 524590, 524591, 524839, 524840
Abstract:

The present invention provides ink compositions for ink-jet printing. The ink compositions comprise by weight from about 0. 1 to 5% by weight of a water-soluble polyurethane; from about 0. 1 to 15% by weight of a 1,2-alkyldiol having 5-9 carbon atoms; and from about 0. 5 to 6% by weight of a pigment. The present invention also provides a process for printing an image on a print medium that comprises applying an inventive ink composition thereto by means of an ink-jet printer. The present invention further provides ink-jet cartridges containing inventive ink compositions.

Waterfast, Environmentally Friendly Inks Adapted For Point-Of-Sale Ink-Jet Ink Applications
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US Patent:

20020078858, Jun 27, 2002
Filed:

Sep 4, 2001
Appl. No.:

09/946460
Inventors:

Xiaohe Chen - San Diego CA, US
David Tyvoll - La Jolla CA, US
George Sarkisian - San Diego CA, US
International Classification:

C09D011/02
US Classification:

106/031470, 106/031490, 106/031510, 106/031580
Abstract:

A waterfast, environmentally friendly ink-jet ink, is disclosed comprising from 1% to 90% by weight of a first humectant selected from the group consisting of glycerol, propanediol, and combinations thereof; from 1% to 25% by weight of a second humectant selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, and combinations thereof; from 1% to 20% by weight of a drying agent selected from the group consisting of 1,2-hexanediol, 1,2-pentanediol, and combinations thereof; from 0% to 20% by weight of 2-pyrrolidone; from 0.05% to 10.0% by weight of a waterfastness control dye selected from the group consisting of azo-containing dyes and phthalocyanine-containing dyes; and at least one additional dye present at from about 1.0% to 10.0% by weight. If the waterfastness control dye is an azo-containing dye, such dyes can include Direct Red 227, Direct Red 254, Direct Yellow 86, and Acid Orange 7. Alternatively, if the waterfastness control dye is a phthalocyanine-containing dye, the nickel, copper or aluminum phthalocyanines can be used.