Patents by Inventor Leonard Stulc
Leonard Stulc 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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Patent number: 7354687Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein substantially all of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, preparing toner particles, drying the toner particles, and milling the dry toner particles in the presence of a wax component to provide a dry toner particle composition having the wax associated with the toner particles.Type: GrantFiled: October 31, 2004Date of Patent: April 8, 2008Assignee: Samsung Electronics CompanyInventors: Leonard Stulc, Ronald J. Moudry, Zbigniew Tokarski, Charles W. Simpson, Gay L. Herman, A. Kristine Fordahl, James A. Baker
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Patent number: 7318987Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles that has been entrained in the toner particle during the formation of the amphipathic copolymer. Methods of making the electrographic toner compositions are also provided. These toner compositions provide images having excellent durability and erasure resistance properties at low fusion temperatures and with little undesired offset.Type: GrantFiled: October 31, 2004Date of Patent: January 15, 2008Assignee: Samsung Electronics CompanyInventors: Charles W. Simpson, Ronald J. Moudry, Leonard Stulc, Zbigniew Tokarski, Gay L. Herman, A. Kristine Fordahl, James A. Baker
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Patent number: 7306886Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein a substantial portion of the wax is entrained in the toner particle and a substantial portion of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, and milling the particles before or after formulation as toner particles with wax in the liquid carrier prior to drying to form the dry toner composition.Type: GrantFiled: October 31, 2004Date of Patent: December 11, 2007Assignee: Samsung Electronics CompanyInventors: Gay L. Herman, Ronald J. Moudry, Zbigniew Tokarski, Charles W. Simpson, Leonard Stulc, A. Kristine Fordahl, James A. Baker
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Patent number: 7106997Abstract: An electrophotographic imaging apparatus having a first toner accepting layer and an intermediate transfer member. The first toner accepting layer is positioned in electrical contact with a) a charge provider, b) an irradiation source that activates photoconductivity in the first toner accepting layer, and b) at least one toner applicator, so that a first toner image can be formed on the first toner accepting layer. The first toner layer is movable, after interaction with a), b) and c), into contact with the intermediate transfer layer from which the first toner image can be transferred to an image bearing member. The intermediate transfer member comprises a non-conductive flexible film layer, a layer of an electrically conductive material affixed to a first surface of the non-conductive flexible film layer and segmented into electrically isolated regions or zones, and the electrically conductive material layer has an electrically resistive polymeric coating thereon.Type: GrantFiled: October 16, 2003Date of Patent: September 12, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Leonard Stulc, Truman Frank Kellie
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Publication number: 20060093940Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein a substantial portion of the wax is entrained in the toner particle and a substantial portion of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, and milling the particles before or after formulation as toner particles with wax in the liquid carrier prior to drying to form the dry toner composition.Type: ApplicationFiled: October 31, 2004Publication date: May 4, 2006Inventors: Gay Herman, Ronald Moudry, Zbigniew Tokarski, Charles Simpson, Leonard Stulc, A. Fordahl, James Baker
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Publication number: 20060093939Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles that has been entrained in the toner particle during the formation of the amphipathic copolymer. Methods of making the electrographic toner compositions are also provided. These toner compositions provide images having excellent durability and erasure resistance properties at low fusion temperatures and with little undesired offset.Type: ApplicationFiled: October 31, 2004Publication date: May 4, 2006Inventors: Charles Simpson, Ronald Moudry, Leonard Stulc, Zbigniew Tokarski, Gay Herman, A. Fordahl, James Baker
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Publication number: 20060093938Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein substantially all of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, preparing toner particles, drying the toner particles, and milling the dry toner particles in the presence of a wax component to provide a dry toner particle composition having the wax associated with the toner particles.Type: ApplicationFiled: October 31, 2004Publication date: May 4, 2006Inventors: Leonard Stulc, Ronald Moudry, Zbigniew Tokarski, Charles Simpson, Gay Herman, A. Fordahl, James Baker
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Publication number: 20050284334Abstract: Black colorant compounds comprise a first ionic dye component having a known color characteristic that absorbs light in at least a portion of the visible light spectrum and a second ionic dye component having a known color characteristic that absorbs light in at least a portion of the visible light spectrum that is not absorbed by the first ionic dye component. The first ionic dye component and the second ionic dye component are complexed together to form an ionically complexed colorant compound that appears black in color. Alternatively, compositions comprise ionically complexed compounds containing a plurality of dye components, where the compounds together in a colorant composition appear black in color.Type: ApplicationFiled: August 30, 2005Publication date: December 29, 2005Inventor: Leonard Stulc
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Publication number: 20050066853Abstract: An ionically complexed colorant compound is provided, comprising an ionic dye component having an apparent color characteristic, a first dye counterion component having a known color characteristic that exhibits a color difference from the ionic dye component of at least about 10 ?E* units, and a colorless counterion component. The ionic dye component is ionically complexed with the first dye counterion component and colorless counterion component in a predetermined ratio to form an ionically complexed colorant compound exhibiting a predetermined color. Compositions and methods of use of these colorants are also provided. Additionally, compositions are provided wherein the ionic dye component, the first dye counterion component, and the colorless counterion component are ionically complexed in a predetermined ratio to form ionically complexed compounds that together in a colorant composition exhibit a predetermined color. Compositions and methods of use of these compositions are also provided.Type: ApplicationFiled: September 30, 2003Publication date: March 31, 2005Inventor: Leonard Stulc
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Publication number: 20050066454Abstract: Black colorant compounds comprise a first ionic dye component having a known color characteristic that absorbs light in at least a portion of the visible light spectrum and a second ionic dye component having a known color characteristic that absorbs light in at least a portion of the visible light spectrum that is not absorbed by the first ionic dye component. The first ionic dye component and the second ionic dye component are complexed together to form an ionically complexed colorant compound that appears black in color. Alternatively, compositions comprise ionically complexed compounds containing a plurality of dye components, where the compounds together in a colorant composition appear black in color.Type: ApplicationFiled: September 30, 2003Publication date: March 31, 2005Inventor: Leonard Stulc
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Publication number: 20050069803Abstract: Liquid electrographic toner compositions are provided comprising a liquid carrier having a Kauri-Butanol number less than about 30 mL and a plurality of toner particles dispersed in the liquid carrier. The toner particles comprise polymeric binder and a pigment comprising a first ionic dye component ionically complexed with a second ionic dye component in a predetermined ratio to form an ionically complexed colorant compound exhibiting a predetermined color. The colorant compound has a molecular weight of less than about 5000 Daltons and is substantially free of metals that are not covalently bonded to the colorant compound. Toners comprising pigments comprising a ionic dye component and a second ionic dye component complexed to form ionically complexed compounds that together in a colorant composition exhibit a predetermined color are also provided. Methods of making and using these toners are disclosed.Type: ApplicationFiled: September 30, 2003Publication date: March 31, 2005Inventor: Leonard Stulc
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Publication number: 20040142271Abstract: An electrophotographic imaging apparatus having a first toner accepting layer and an intermediate transfer member. The first toner accepting layer is positioned in electrical contact with a) a charge provider, b) an irradiation source that activates photoconductivity in the first toner accepting layer, and b) at least one toner applicator, so that a first toner image can be formed on the first toner accepting layer. The first toner layer is movable, after interaction with a), b) and c), into contact with the intermediate transfer layer from which the first toner image can be transferred to an image bearing member. The intermediate transfer member comprises a non-conductive flexible film layer, a layer of an electrically conductive material affixed to a first surface of the non-conductive flexible film layer and segmented into electrically isolated regions or zones, and the electrically conductive material layer has an electrically resistive polymeric coating thereon.Type: ApplicationFiled: October 16, 2003Publication date: July 22, 2004Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Leonard Stulc, Truman Frank Kellie
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Publication number: 20040086305Abstract: An electrophotographic imaging apparatus has a first toner accepting layer and an intermediate transfer member. The first toner accepting layer is positioned in electrical contact with a) a charge provider, b) an irradiation source that activates photoconductivity in the first toner accepting layer, and b) at least one toner applicator, so that a first toner image can be formed on the first toner accepting layer. The first toner layer is movable (after interaction with a), b) and c)) into contact with the intermediate transfer layer from which the first toner image can be transferred to an image bearing member. The intermediate transfer member comprises a non-conductive flexible film layer, a layer of an electrically conductive material affixed to a first surface of the non-conductive flexible film layer, and the electrically conductive material layer has an electrically resistive polymeric coating thereon.Type: ApplicationFiled: August 21, 2003Publication date: May 6, 2004Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Leonard Stulc, Truman Frank Kellie, Charles W. Simpson, Jiayi Zhu, A. Kristine Fordahl