Patents by Inventor Olga Kagan
Olga Kagan 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: 20220206407Abstract: Described herein is a liquid electrostatic ink composition comprising a liquid carrier; and chargeable toner particles comprising a resin and an aluminium-based color-shifting pigment. Also described herein is a method of printing comprising: printing onto a substrate a liquid electrostatic ink composition comprising: a liquid carrier; and chargeable toner particles comprising a resin and an aluminium-based color-shifting pigment, and a printed article comprising a print substrate having printed thereon the electrostatic ink composition.Type: ApplicationFiled: July 31, 2019Publication date: June 30, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Olga Kagan, Vladislav KAPLOUN, Rada NUCHIMOV, Michael KOKOTOV, Yaron GRINWALD, Albert TEISHEV, Ofir BROS, Samer FARRAN
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Patent number: 11236248Abstract: A method for producing a conductive liquid electrophotographic ink composition is described, the method comprising: heating a polymer resin in a carrier fluid to dissolve the polymer resin; adding conductive metallic pigment particles to be coated to the carrier fluid; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the conductive metallic pigment particles; reheating the suspension of partially coated conductive metallic pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the conductive metallic pigment particles, thereby producing the conductive liquid electrophotographic ink composition.Type: GrantFiled: March 4, 2016Date of Patent: February 1, 2022Assignee: HP Indigo B.V.Inventors: Olga Kagan, Yaron Grinwald, Rada Nuchimov, Shiran Zabar, Eyal Negreanu, Guy Nesher
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Patent number: 10761445Abstract: According to an example, a resin, a carrier liquid, and a pearlescent pigment may be mixed to form a liquid electrophotographic ink.Type: GrantFiled: March 24, 2016Date of Patent: September 1, 2020Assignee: HP Indigo B.V.Inventors: Olga Kagan, Emad Masoud, Yana Reznick, Rada Nuchimov, Danny Feldman, Haim Cohen, Shiran Zabar, Yaron Grinwald, Michael Kokotov
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Publication number: 20200159141Abstract: The present disclosure relates to a method for producing a conductive liquid electrophotographic ink composition. The method comprises: heating a polymer resin in a carrier liquid to dissolve the polymer resin; adding conductive metallic pigment Particles to the carrier liquid; and cooling the carrier liquid to effect precipitation of the polymer resin from the carrier liquid, such that a coating comprising the resin is formed on the conductive metallic pigment particles; wherein: I) the polymer resin comprises (i) a copolymer of an alkylene monomer and a monomer selected from acrylic acid and methacrylic acid, and (ii) an ionomer of an alkylene monomer and a monomer selected from acrylic acid and methacrylic acid, wherein at least a portion of the acrylic acid and/or methacrylic acid groups are neutralised with metal ions; and/or II) a charge adjuvant is included in the coating that is formed on the conductive metallic pigment particles.Type: ApplicationFiled: August 18, 2017Publication date: May 21, 2020Inventors: Gilad Noy, Adi Mann, Vered Maagan, Olga Kagan, Albert Teishev
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Patent number: 10591838Abstract: Disclosed herein is an electrostatic ink composition. The composition may comprise a carrier liquid, which has suspended therein: thermochromic pigment particles having a layer of thermoplastic resin thereon. Method for forming electrostatic ink composition and a substrate having the electrostatic ink composition printed thereon are also disclosed herein.Type: GrantFiled: March 18, 2016Date of Patent: March 17, 2020Assignee: HP Indigo B.V.Inventors: Olga Kagan, Danny Feldman, Rada Nuchimov, Yaron Grinwald, Shiran Zabar, Gleb Romantcov
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Patent number: 10394153Abstract: Provided in one example herein is a liquid electrophotographic ink composition. The composition comprises: a carrier fluid comprising a polymer; ink particles each comprising a non-aqueous polymeric resin and pigment particles distributed in the polymeric resin; and a charge director. The pigment particles comprise a metal oxide and have a hydrophobic surface. The hydrophobic surface comprises at least one of the following: (i) nanoparticles attached to each of the pigment particles, the nanoparticles comprising at least one of an oxide, a phosphate, and a nitrate; (ii) a coating disposed over each of the pigment particles, the coating comprising at least one of an oxide, a phosphate, and a nitrate; and (iii) a coating disposed over each of the pigment particles, the coating comprising at least one of a polymer and an oligomer.Type: GrantFiled: December 22, 2014Date of Patent: August 27, 2019Assignee: HP Indigo B.V.Inventors: Emad Masoud, Neta Filip-Granit, Vladislav Kaploun, Olga Kagan, Yelena Litichevski, Albert Teishev
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Publication number: 20190016907Abstract: Disclosed herein is an electrostatic ink composition. The composition may comprise a carrier liquid, which has suspended therein: thermochromic pigment particles having a layer of thermoplastic resin thereon. Method for forming electrostatic ink composition and a substrate having the electrostatic ink composition printed thereon are also disclosed herein.Type: ApplicationFiled: March 18, 2016Publication date: January 17, 2019Applicant: HP Indigo B.V.Inventors: Olga KAGAN, Danny FELDMAN, Rada NUCHIMOV, Yaron GRINWALD, Shiran ZABAR, Gleb ROMANTCOV
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Publication number: 20190018332Abstract: According to an example, a resin, a carrier liquid, and a pearlescent pigment may be mixed to form a liquid electrophotographic ink.Type: ApplicationFiled: March 24, 2016Publication date: January 17, 2019Applicant: HP Indigo B.V.Inventors: Olga KAGAN, Emad MASOUD, Yana REZNICK, Rada NUCHIMOV, Danny FELDMAN, Haim COHEN, Shiran ZABAR, Yaron GRINWALD, Michael KOKOTOV
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Publication number: 20180371279Abstract: A method for producing a conductive liquid electrophotographic ink composition is described, the method comprising: heating a polymer resin in a carrier fluid to dissolve the polymer resin; adding conductive metallic pigment particles to be coated to the carrier fluid; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the conductive metallic pigment particles; reheating the suspension of partially coated conductive metallic pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the conductive metallic pigment particles, thereby producing the conductive liquid electrophotographic ink composition.Type: ApplicationFiled: March 4, 2016Publication date: December 27, 2018Applicant: HP Indigo B.V.Inventors: Olga KAGAN, Yaron GRINWALD, Rada NUCHIMOV, Shiran ZABAR, Eyal NEGREANU, Guy NESHER
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Publication number: 20180275548Abstract: Provided in one example herein is a liquid electrophotographic ink composition. The composition comprises: a carrier fluid comprising a polymer; ink particles each comprising a non-aqueous polymeric resin and pigment particles distributed in the polymeric resin; and a charge director. The pigment particles comprise a metal oxide and have a hydrophobic surface. The hydrophobic surface comprises at least one of the following: (i) nanoparticles attached to each of the pigment particles, the nanoparticles comprising at least one of an oxide, a phosphate, and a nitrate; (ii) a coating disposed over each of the pigment particles, the coating comprising at least one of an oxide, a phosphate, and a nitrate; and (iii) a coating disposed over each of the pigment particles, the coating comprising at least one of a polymer and an oligomer.Type: ApplicationFiled: December 22, 2014Publication date: September 27, 2018Inventors: Emad Masoud, Neta Filip-Granit, Vladislav Kaploun, Olga Kagan, Yelena Litichevski, Albert Teishev
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Patent number: 9983497Abstract: A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin, suspending in the carrier fluid the pigment particles to be coated; and effecting precipitation of the polymer resin from the carrier fluid, such that a coating of the resin is formed on the pigment particles.Type: GrantFiled: July 29, 2014Date of Patent: May 29, 2018Assignee: HP Indigo B.V.Inventors: Adi Mann, Albert Teishev, Eyal Handel, Marc Klein, Olga Kagan, Yaron Grinwald, Vladislav Kaploun
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Patent number: 9745488Abstract: The application relates to a method of producing an electrostatic ink composition, the method comprising: mixing a resin and a conductive pigment in a continuous mixer to form a compounded mixture comprising particles comprising the resin and the pigment; adding a liquid carrier to the compounded mixture, such that the particles comprising the resin and the conductive pigment are dispersed in the liquid carrier; and, before, during or after adding the liquid carrier to the compounded mixture: imparting a charge on the particles comprising the resin and the pigment.Type: GrantFiled: May 31, 2012Date of Patent: August 29, 2017Assignee: Hewlett-Packard Indigo B.V.Inventors: Adi Vinegrad, Ruslan Tovberg, Eyal Negreanu, Olga Kagan, Yaron Grinwald, Reut Avigdor
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Publication number: 20170227877Abstract: A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin, suspending in the carrier fluid the pigment particles to be coated; and effecting precipitation of the polymer resin from the carrier fluid, such that a coating of the resin is formed on the pigment particles.Type: ApplicationFiled: July 29, 2014Publication date: August 10, 2017Inventors: Adi Mann, Albert Teishev, Eyal Handel, Marc Klein, Olga Kagan, Yaron Grinwald, Vladislav Kaploun
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Publication number: 20150129811Abstract: The application relates to a method of producing an electrostatic ink composition, the method comprising: mixing a resin and a conductive pigment in a continuous mixer to form a compounded mixture comprising particles comprising the resin and the pigment; adding a liquid carrier to the compounded mixture, such that the particles comprising the resin and the conductive pigment are dispersed in the liquid carrier; and, before, during or after adding the liquid carrier to the compounded mixture: imparting a charge on the particles comprising the resin and the pigment.Type: ApplicationFiled: May 31, 2012Publication date: May 14, 2015Inventors: Inbar Adi, Ruslan Tovberg, Eyal Negreanu, Olga Kagan, Yaron Grinwald, Reut Avigdor