Patents by Inventor Lee Yezek
Lee Yezek 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: 20230350264Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.Type: ApplicationFiled: June 29, 2023Publication date: November 2, 2023Inventors: Stephen J. TELFER, Richard J. PAOLINI, JR., Sunil Krishna SAINIS, Randal M. HILL, Isaac W. MORAN, Lee YEZEK, Alain BOUCHARD, William VETTERLING, George G. HARRIS, Hywel MORGAN, Luke SLOMINSKI, Jay William ANSETH, Jennifer M. MORRISON, Craig A. HERB
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Patent number: 11733580Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.Type: GrantFiled: April 28, 2021Date of Patent: August 22, 2023Assignee: E Ink CorporationInventors: Stephen J. Telfer, Richard J. Paolini, Jr., Sunil Krishna Sainis, Randal M. Hill, Isaac W. Moran, Lee Yezek, Alain Bouchard, William Vetterling, George G. Harris, Hywel Morgan, Luke Slominski, Jay William Anseth, Jennifer M. Morrison, Craig A. Herb
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Publication number: 20230213790Abstract: An electrophoretic medium is disclosed comprising four types of particles. The first type of particles has a first charge polarity. The second and third types of particles have a second charge polarity that is opposite to the first charge polarity. The electrophoretic medium further comprises, a first charge control agent, and a second charge control agent, the molecular structure of the first charge control agent including a quaternary ammonium group and a non-polar tail and the molecular structure of the second charge control agent including two or more polar groups, and a non-polar tail.Type: ApplicationFiled: December 28, 2022Publication date: July 6, 2023Inventors: Lee YEZEK, Stephen J. TELFER, Sherry Hsin-Yi TSAI, Ziyan WU, Eugene BZOWEJ, Ali SARVI, Craig GIBEAU
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Publication number: 20230152659Abstract: A variable light transmission device has at least one layer of electrophoretic medium comprising charged particles. Application of a an electric field having a waveform formed by a superposition of a carrier and a modulator waveform enables the switching of the device from a closed state to an open state, wherein the open state has higher light transmission than the closed state. As a result, the device enables the selection of the desired optical state by the user.Type: ApplicationFiled: January 17, 2023Publication date: May 18, 2023Inventors: Kosta LADAVAC, Richard J. PAOLINI, Jr., Stephen J. TELFER, Lee YEZEK, Sunil Krishna SAINIS, Peter Carsten Bailey WIDGER
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Patent number: 11613654Abstract: A polysiloxane-substituted quinacridone pigment is produced by a quinacridone pigment with an epoxy-terminated polysiloxane under conditions effective to cause the epoxy group on the polysiloxane to react with, and bond the polysiloxane to, the quinacridone pigment. The quinacridone pigment thus produced has the polysiloxane grouping bonded to one of the quinacridone nitrogen atoms via a hydrocarbon linking group, which bears a hydroxyl group on a carbon atom ? or ? to the quinacridone nitrogen atom. These quinacridone pigments are useful in electrophoretic displays.Type: GrantFiled: December 13, 2021Date of Patent: March 28, 2023Assignee: E Ink CorporationInventor: Lee Yezek
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Patent number: 11614671Abstract: A composite particle is provided that comprises a base particle comprising at least a pigment or dye and cross-linked polyurea, a plurality of hydrophilic oligomeric groups, and a plurality of amine groups on the exterior portion of the base particle, and a steric stabilization polymer which is chemically bonded or physi-sorbed on the surface of the base particle. The cross-linked polyurea may form a network throughout the base particle. A method of making the composite particle includes providing either a solution containing a dye or a dispersion containing a pigment in a water-dispersible polyfunctional isocyanate dissolved in a water-miscible solvent, forming an emulsion of the solution/dispersion in water, agitating the emulsion while the polyfunctional isocyanate is converted into a cross-linked polyurea, and separating the composite particle containing the cross-linked polyurea and the dye/pigment from the emulsion.Type: GrantFiled: December 13, 2021Date of Patent: March 28, 2023Assignee: E Ink CorporationInventors: Stephen J. Telfer, Craig A. Herb, Lee Yezek
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Patent number: 11579510Abstract: A variable light transmission device has at least one layer of electrophoretic medium comprising charged particles. Application of a an electric field having a waveform formed by a superposition of a carrier and a modulator waveform enables the switching of the device from a closed state to an open state, wherein the open state has higher light transmission than the closed state. As a result, the device enables the selection of the desired optical state by the user.Type: GrantFiled: April 30, 2020Date of Patent: February 14, 2023Assignee: E Ink CorporationInventors: Kosta Ladavac, Richard J. Paolini, Jr., Stephen J. Telfer, Lee Yezek, Sunil Krishna Sainis, Peter Carsten Bailey Widger
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Publication number: 20230005439Abstract: An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.Type: ApplicationFiled: August 30, 2022Publication date: January 5, 2023Inventors: Stephen J. TELFER, Stephen BULL, Jennifer M. MORRISON, Luke M. SLOMINSKI, David Darrell MILLER, Olga Vladimirova BARYKINA-TASSA, Christopher L. HOOGEBOOM, Ana L. LATTES, Lee YEZEK, Brandon MACDONALD, Kosta LADAVAC, Craig A. HERB
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COMPOSITE ELECTROPHORETIC PARTICLES HAVING POLYMER SHELLS INCLUDING FIRST AND SECOND MONOMERIC UNITS
Publication number: 20220413323Abstract: An electrophoretic medium includes a fluid, a plurality of light scattering charged particles having a first polarity, and a first, second, and third set of particles, each set having a color different from each other set. The first and second particles may have a second polarity opposite to the first polarity, and the mobility of the third set of particles is less than half of the mobility of the light scattering particles, the first set of charged particles, and the second set of charged particles.Type: ApplicationFiled: August 29, 2022Publication date: December 29, 2022Inventors: Stephen J. TELFER, Eugene BZOWEJ, Kenneth R. CROUNSE, John L. MARSHALL, Brandon MACDONALD, Ziyan WU, Lee YEZEK -
Patent number: 11468855Abstract: An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.Type: GrantFiled: April 27, 2020Date of Patent: October 11, 2022Assignee: E Ink CorporationInventors: Stephen J. Telfer, Stephen Bull, Jennifer M. Morrison, Luke M. Slominski, David Darrell Miller, Olga Vladimirova Barykina-Tassa, Christopher L. Hoogeboom, Ana L. Lattes, Lee Yezek, Brandon MacDonald, Kosta Ladavac, Craig A. Herb
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Patent number: 11460722Abstract: An electrophoretic medium includes a fluid, a plurality of light scattering charged particles having a first polarity, and a first, second, and third set of particles, each set having a color different from each other set. The first and second particles may have a second polarity opposite to the first polarity, and the mobility of the third set of particles is less than half of the mobility of the light scattering particles, the first set of charged particles, and the second set of charged particles.Type: GrantFiled: May 6, 2020Date of Patent: October 4, 2022Assignee: E Ink CorporationInventors: Stephen J. Telfer, Eugene Bzowej, Kenneth R. Crounse, John L. Marshall, Brandon Macdonald, Ziyan Wu, Lee Yezek
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Publication number: 20220098414Abstract: A polysiloxane-substituted quinacridone pigment is produced by a quinacridone pigment with an epoxy-terminated polysiloxane under conditions effective to cause the epoxy group on the polysiloxane to react with, and bond the polysiloxane to, the quinacridone pigment. The quinacridone pigment thus produced has the polysiloxane grouping bonded to one of the quinacridone nitrogen atoms via a hydrocarbon linking group, which bears a hydroxyl group on a carbon atom ? or ? to the quinacridone nitrogen atom. These quinacridone pigments are useful in electrophoretic displays.Type: ApplicationFiled: December 13, 2021Publication date: March 31, 2022Inventor: Lee YEZEK
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Publication number: 20220100046Abstract: A composite particle is provided that comprises a base particle comprising at least a pigment or dye and cross-linked polyurea, a plurality of hydrophilic oligomeric groups, and a plurality of amine groups on the exterior portion of the base particle, and a steric stabilization polymer which is chemically bonded or physi-sorbed on the surface of the base particle. The cross-linked polyurea may form a network throughout the base particle. A method of making the composite particle includes providing either a solution containing a dye or a dispersion containing a pigment in a water-dispersible polyfunctional isocyanate dissolved in a water-miscible solvent, forming an emulsion of the solution/dispersion in water, agitating the emulsion while the polyfunctional isocyanate is converted into a cross-linked polyurea, and separating the composite particle containing the cross-linked polyurea and the dye/pigment from the emulsion.Type: ApplicationFiled: December 13, 2021Publication date: March 31, 2022Inventors: Stephen J. TELFER, Craig A. HERB, Lee YEZEK
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Patent number: 11248122Abstract: A polysiloxane-substituted quinacridone pigment is produced by a quinacridone pigment with an epoxy-terminated polysiloxane under conditions effective to cause the epoxy group on the polysiloxane to react with, and bond the polysiloxane to, the quinacridone pigment. The quinacridone pigment thus produced has the polysiloxane grouping bonded to one of the quinacridone nitrogen atoms via a hydrocarbon linking group, which bears a hydroxyl group on a carbon atom ? or ? to the quinacridone nitrogen atom. These quinacridone pigments are useful in electrophoretic displays.Type: GrantFiled: December 27, 2018Date of Patent: February 15, 2022Assignee: E Ink CorporationInventor: Lee Yezek
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Patent number: 11231634Abstract: A composite particle is provided that comprises a base particle comprising at least a pigment or dye and cross-linked polyurea, a plurality of hydrophilic oligomeric groups, and a plurality of amine groups on the exterior portion of the base particle, and a steric stabilization polymer which is chemically bonded or physi-sorbed on the surface of the base particle. The cross-linked polyurea may form a network throughout the base particle. A method of making the composite particle includes providing either a solution containing a dye or a dispersion containing a pigment in a water-dispersible polyfunctional isocyanate dissolved in a water-miscible solvent, forming an emulsion of the solution/dispersion in water, agitating the emulsion while the polyfunctional isocyanate is converted into a cross-linked polyurea, and separating the composite particle containing the cross-linked polyurea and the dye/pigment from the emulsion.Type: GrantFiled: May 26, 2020Date of Patent: January 25, 2022Assignee: E Ink CorporationInventors: Stephen J. Telfer, Craig A. Herb, Lee Yezek
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Patent number: 11195481Abstract: An electrophoretic display comprising a fluid including a first species of particles and a charge control agent disposed between first and second electrodes. When a first addressing impulse have an electrical polarity is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse but having the same electrical polarity, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.Type: GrantFiled: September 27, 2019Date of Patent: December 7, 2021Assignee: E Ink CorporationInventors: Stephen J. Telfer, Stephen Bull, Alain Bouchard, Craig A. Herb, Kosta Ladavac, Ana L. Lattes, Jennifer M. Morrison, Richard J. Paolini, Jr., Michael Thomas Regan, Luke M. Slominski, Lee Yezek, Kenneth R. Crounse, J. Ryan Kruse, Christopher L. Hoogeboom, Jason D. Feick, David Darrell Miller
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Publication number: 20210263385Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.Type: ApplicationFiled: April 28, 2021Publication date: August 26, 2021Inventors: Stephen J. TELFER, Richard J. PAOLINI, JR., Sunil Krishna SAINIS, Randal M. HILL, Isaac W. MORAN, Lee YEZEK, Alain BOUCHARD, William VETTERLING, George G. HARRIS, Hywel MORGAN, Luke SLOMINSKI, Jay William ANSETH, Jennifer M. MORRISON, Craig A. HERB
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Publication number: 20210210026Abstract: An electrophoretic display comprising a fluid including a first species of particles and a charge control agent disposed between first and second electrodes. When a first addressing impulse have an electrical polarity is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse but having the same electrical polarity, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.Type: ApplicationFiled: March 25, 2021Publication date: July 8, 2021Inventors: Stephen J. TELFER, Stephen BULL, Alain BOUCHARD, Craig A. HERB, Kosta LADAVAC, Ana L. LATTES, Jennifer M. MORRISON, Richard J. PAOLINI, JR., Michael Thomas REGAN, Luke M. SLOMINSKI, Lee YEZEK, Kenneth R. CROUNSE, J. Ryan KRUSE, Christopher L. HOOGEBOOM, Jason D. FEICK, David D. MILLER
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Patent number: 11029576Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.Type: GrantFiled: October 24, 2019Date of Patent: June 8, 2021Assignee: E Ink CorporationInventors: Stephen J. Telfer, Richard J. Paolini, Jr., Sunil Krishna Sainis, Randal M. Hill, Isaac W. Moran, Lee Yezek, Alain Bouchard, William Vetterling, George G. Harris, Hywel Morgan, Luke Slominski, Jay William Anseth, Jennifer M. Morrison, Craig A. Herb
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Publication number: 20200355946Abstract: An electrophoretic medium includes a fluid, a plurality of light scattering charged particles having a first polarity, and a first, second, and third set of particles, each set having a color different from each other set. The first and second particles may have a second polarity opposite to the first polarity, and the mobility of the third set of particles is less than half of the mobility of the light scattering particles, the first set of charged particles, and the second set of charged particles.Type: ApplicationFiled: May 6, 2020Publication date: November 12, 2020Inventors: Stephen J. TELFER, Eugene BZOWEJ, Kenneth R. CROUNSE, John L. MARSHALL, Brandon MACDONALD, Ziyan WU, Lee YEZEK