Patents by Inventor Yi-Hua Tsao
Yi-Hua Tsao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230348738Abstract: An example of a liquid ink includes a pigment dispersion, a polyurethane dispersion, a polytetrafluoroethylene wax emulsion, a co-solvent, and a balance of water. A particle diameter of a polytetrafluoroethylene wax in the polytetrafluoroethylene wax emulsion is less than 50 nm. Examples of the liquid ink may be incorporated into a thermal inkjet printing system.Type: ApplicationFiled: July 9, 2023Publication date: November 2, 2023Inventors: Max Yen, Alex Trubnikov, Shimrit Rubin, Or Pinkesfeld, Marisa Samoshin, Yi-Hua Tsao, Eytan Cohen
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Patent number: 11732146Abstract: An example of a liquid ink includes a pigment dispersion, a polyurethane dispersion, a polytetrafluoroethylene wax emulsion, a co-solvent, and a balance of water. A particle diameter of a polytetrafluoroethylene wax in the polytetrafluoroethylene wax emulsion is less than 50 nm. Examples of the liquid ink may be incorporated into a thermal inkjet printing system.Type: GrantFiled: October 10, 2016Date of Patent: August 22, 2023Assignee: Hewlett-Packard Development Company, L.P.Inventors: Max Yen, Alex Trubnikov, Shimrit Rubin, Or Pinkesfeld, Marisa Samoshin, Yi-Hua Tsao, Eytan Cohen
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Patent number: 10844236Abstract: An example of a liquid bonding agent, for a liquid ink including a wax emulsion in an amount less than 1% actives, includes a calcium salt, the wax emulsion, an acetylenic surfactant, a glycol, and a balance of water. The wax emulsion is present in the liquid bonding agent in an amount ranging from greater than 0% actives to about 2% actives. The liquid bonding agent is to be digitally printed with a thermal inkjet printhead on a substrate under the liquid ink.Type: GrantFiled: July 20, 2016Date of Patent: November 24, 2020Assignee: Hewlett-Packard Development Company, L.P.Inventors: Max Yen, Yi-Hua Tsao, Marisa Weaver, Elizabeth Ann Visnyak, Jessica Rikki Vosler, Jon A. Crabtree, George Sarkisian, Yubai Bi, Maria Alexeevna Kabalnova
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Patent number: 10829658Abstract: The present disclosure refers to an inkjet ink set including a black ink with a black pigment, a yellow ink with a yellow pigment, a cyan ink with a cyan pigment and a magenta ink with a magenta pigment, wherein at least one of the ink further contains a polyurethane binder; non-ionic surfactants; humectant solvent; non-volatile glycol ether co-solvent; a polyethylene wax emulsion and a balance of water. The inkjet ink set can also includes an orange ink, a green ink and/or a violet ink. The present disclosure refers also to a system for printing the ink set described herein.Type: GrantFiled: June 30, 2017Date of Patent: November 10, 2020Assignee: Hewlett-Packard Development Company, L.P.Inventors: Alireza Rahimi, George Sarkisian, Yi-Hua Tsao, Benjamin Abelovski, Gregg A. Lane, Tienteh Chen, Or Brandstein, Jun Yang, Olakemi Akinlabi
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Publication number: 20200087523Abstract: An example of a liquid ink includes a pigment dispersion, a polyurethane dispersion, a polytetrafluoroethylene wax emulsion, a co-solvent, and a balance of water. A particle diameter of a polytetrafluoroethylene wax in the polytetrafluoroethylene wax emulsion is less than 50 nm. Examples of the liquid ink may be incorporated into a thermal inkjet printing system.Type: ApplicationFiled: October 10, 2016Publication date: March 19, 2020Inventors: Max Yen, Alex Trubnikov, Shimrit Rubin, Or Pinkesfeld, Marisa Samoshin, Yi-Hua Tsao, Eytan Cohen
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Publication number: 20200024469Abstract: The present disclosure is drawn to a green ink including a green pigment in an amount from 1.5 wt % to 6 wt %, a styrene acrylic polymer having a weight average molecular weight from 3,000 to 30,000, a polyurethane having a weight average molecular weight from 15,000 to 120,000, an organic co-solvent, and water in an amount from 50 wt % to 90 wt %.Type: ApplicationFiled: January 30, 2017Publication date: January 23, 2020Applicant: Hewlett-Packard Development Company, L.P.Inventors: Dennis Z. Guo, Jie ZHENG, George SARKISIAN, Aiireza RAHIMl, Yi-Hua TSAO
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Publication number: 20190315987Abstract: The present disclosure refers to an inkjet ink set comprising a black ink with a black pigment, a yellow ink with a yellow pigment, a cyan ink with a cyan pigment and a magenta ink with a magenta pigment, wherein at least one of the ink further contains a polyurethane binder; non-ionic surfactants; humectant solvent; non-volatile glycol ether co-solvent; a polyethylene wax emulsion and a balance of water. The inkjet ink set can also comprise an orange ink, a green ink and/or a violet ink. The present disclosure refers also to a system for printing the ink set described herein.Type: ApplicationFiled: June 30, 2017Publication date: October 17, 2019Inventors: Alireza Rahimi, George Sarkisian, Yi-Hua Tsao, Benjamin Abelovski, Gregg A. Lane, Tienteh Chen, Or Brandstein, Jun Yang, Olakemi Akinlabi
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Publication number: 20190136078Abstract: An example of a liquid bonding agent, for a liquid ink including a wax emulsion in an amount less than 1% actives, includes a calcium salt, the wax emulsion, an acetylenic surfactant, a glycol, and a balance of water. The wax emulsion is present in the liquid bonding agent in an amount ranging from greater than 0% actives to about 2% actives. The liquid bonding agent is to be digitally printed with a thermal inkjet printhead on a substrate under the liquid ink.Type: ApplicationFiled: July 20, 2016Publication date: May 9, 2019Inventors: Max Yen, Yi-Hua Tsao, Marisa Weaver, Elizabeth Ann Visnyak, Jessica Rikki Vosler, Jon A. Crabtree, George Sarkisian, Yubai Bi, Maria Alexeevna Kabalnova
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Patent number: 9637654Abstract: An ink composition is disclosed herein. The ink composition includes from about 5 wt % to about 25 wt % of a co-solvent; from about 0.025 wt % to about 0.2 wt % of i) a chelating agent represented by formula 1, wherein R? is a carboxylic acid functional group or a carboxylate salt functional group and n>2; ii) a chelating agent represented by formula 2:, wherein R is a carboxylic acid functional group or a carboxylate salt functional group, m is greater than or equal to 1, x is greater than or equal to 2, y is greater than or equal to 1, and z is greater than or equal to 2; iii) a chelating agent represented by formula 3, wherein any of r, s, t, or u is a sulfonic acid functional group or a sulfonate functional group; or iv) combinations of any of i, ii, and iii. The ink composition also includes a balance of water.Type: GrantFiled: October 25, 2011Date of Patent: May 2, 2017Assignee: Hewlett-Packard Development Company, L.P.Inventors: Keshava A. Prasad, Xiaohe Chen, Fereshteh Khorrami, Yi-Hua Tsao, Dennis Z. Guo
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Patent number: 9493013Abstract: An inkjet ink set includes a black ink, a yellow ink, a cyan ink, and a magenta ink. The magenta ink includes an ink vehicle including a polyurethane binder, and a dispersed magenta pigment in the ink vehicle. The magenta pigment is chosen from Pigment Red 282.Type: GrantFiled: January 31, 2011Date of Patent: November 15, 2016Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xiaohe Chen, Pradeep Kumar Koyadan Kizhakkedath, Dennis P. Parazak, Keshava A. Prasad, Savka Ilieva Stoeva, Yi-Hua Tsao, Tze Hwei Tseeng, Ervin Mubarekyan
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Publication number: 20140300673Abstract: An ink composition is disclosed herein. The ink composition includes from about 5 wt % to about 25 wt % of a co-solvent; from about 0.025 wt % to about 0.2 wt % of i) a chelating agent represented by formula 1, wherein R? is a carboxylic acid functional group or a carboxylate salt functional group and n>2; ii) a chelating agent represented by formula 2:, wherein R is a carboxylic acid functional group or a carboxylate salt functional group, m is greater than or equal to 1, x is greater than or equal to 2, y is greater than or equal to 1, and z is greater than or equal to 2; iii) a chelating agent represented by formula 3, wherein any of r, s, t, or u is a sulfonic acid functional group or a sulfonate functional group; or iv) combinations of any of i, ii, and iii. The ink composition also includes a balance of water.Type: ApplicationFiled: October 25, 2011Publication date: October 9, 2014Inventors: Keshava A. Prasad, Xiaohe Chen, Fereshteh Khorrami, Yi-Hua Tsao, Dennis Z. Guo
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Patent number: 8840231Abstract: Compositions, systems, and methods for providing smudge resistant and durable ink-jet images having good optical density are provided. Specifically, a system for printing durable ink-jet ink images can comprise a first ink-jet pen containing an ink-jet ink and a second ink-jet pen containing a fixer composition. The ink-jet ink can comprise a first liquid vehicle and a colorant. The fixer composition can comprise a second liquid vehicle, and from 0.5 wt % to 5 wt % of a cationic copolymer of an epihalohydrin and an amine. Upon overprinting or underprinting the fixer composition with respect to the ink-jet ink on a substrate, a durable image can be formed.Type: GrantFiled: October 4, 2005Date of Patent: September 23, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Christian Schmid, Richard B. Anderson, Yi-Hua Tsao, Ervin Muberekyan
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Publication number: 20130307914Abstract: An inkjet ink set includes a black ink, a yellow ink, a cyan ink, and a magenta ink. The magenta ink includes an ink vehicle including a polyurethane binder, and a dispersed magenta pigment in the ink vehicle. The magenta pigment is chosen from Pigment Red 282.Type: ApplicationFiled: January 31, 2011Publication date: November 21, 2013Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xiaohe Chen, Pradeep Kumar Koyadan Kizhakkedath, Dennis P. Parazak, Keshava A. Prasad, Savka Ilieva Stoeva, Yi-Hua Tsao, Tze Hwei Tseeng, Ervin Mubarekyan
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Patent number: 7951233Abstract: An ink for use in inkjet printing has a colorant which has a precipitation rate in the presence of a predetermined fixer that is selected to have a value sufficiently low as to enable an increase in dot size of the colorant and produce a better color.Type: GrantFiled: October 24, 2005Date of Patent: May 31, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventor: Yi-Hua Tsao
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Patent number: 7837291Abstract: The invention relates to dissolving an anionic dye/cationic polymer complex including the step of applying to the complex a water-soluble solvent having a dielectric constant from 20 to 43 at standard temperature and pressure.Type: GrantFiled: January 30, 2009Date of Patent: November 23, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Christian Schmid, Rodney D. Stramel, Yi-Hua Tsao
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Patent number: 7654633Abstract: The invention relates to dissolving an anionic dye/cationic polymer complex including the step of applying to the complex a water-soluble solvent having a dielectric constant from 20 to 43 at standard temperature and pressure.Type: GrantFiled: October 21, 2005Date of Patent: February 2, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Christian Schmid, Rodney D. Stramel, Yi-Hua Tsao
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Patent number: 7621631Abstract: The present invention includes a method of enhancing color space of dye-based ink. The print zone is heated while depositing fixer fluid and dye-based ink. In an embodiment, the print zone is heated to a temperature between about 45° C. and 85° C. The fixer fluid may be underprinted and/or overprinted. Printing may be effected using any desired print mode, including one-pass, two-pass or four-pass.Type: GrantFiled: February 4, 2004Date of Patent: November 24, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventor: Yi-Hua Tsao
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Patent number: 7572326Abstract: A fixer fluid for an inkjet ink set includes an aqueous vehicle, and a tri-alkyl-substituted amine-N-oxide. The fixer fluid also includes an acid, a cationic polyelectrolyte, or combinations of the acid and polyelectrolyte(s).Type: GrantFiled: April 18, 2007Date of Patent: August 11, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Mark L. Choy, Gary W. Byers, Yi-Hua Tsao, George Sarkisian, Keshava A. Prasad, Christian Schmid, Ervin Mubarekyan
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Publication number: 20090197996Abstract: The invention relates to dissolving an anionic dye/cationic polymer complex comprising the step of applying to the complex a water-soluble solvent having a dielectric constant from 20 to 43 at standard temperature and pressure.Type: ApplicationFiled: January 30, 2009Publication date: August 6, 2009Inventors: Christian Schmid, Rodney D. Stramel, Yi-Hua Tsao
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Patent number: 7553395Abstract: Print media and methods of making print media are disclosed. One exemplary print medium, among others, includes a substrate having a fibrous component. In addition, a cationic guanidine polymer compound or salt thereof and a metallic salt are each disposed within the fibrous component of the substrate.Type: GrantFiled: April 2, 2004Date of Patent: June 30, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: John L Stoffel, Bill Sperry, Richard J McManus, Hai Q Tran, Yi-Hua Tsao