Patents by Inventor Howard S. Tom
Howard S. Tom 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: 20190160532Abstract: Apparatus and methods for making metal-connected particle articles. A metal containing fluid is selectively applied to a layer of particles. The metal in the fluid is used to form metal connections between particles. The metal connections are formed at temperatures below the sintering temperature of the particles in the layer of particles.Type: ApplicationFiled: January 31, 2019Publication date: May 30, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Kristopher J. Erickson, Krzysztof Nauka, Thomas Anthony, Lihua Zhao, Howard S. Tom
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Publication number: 20190160533Abstract: Apparatus and methods for making metal-connected particle articles. A metal containing fluid is selectively applied to a layer of particles. The metal in the fluid is used to form metal connections between particles. The metal connections are formed at temperatures below the sintering temperature of the particles in the layer of particles.Type: ApplicationFiled: February 1, 2019Publication date: May 30, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Kristopher J. Erickson, Krzysztof Nauka, Thomas Anthony, Lihua Zhao, Howard S. Tom
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Publication number: 20190152132Abstract: In one example, an apparatus for generating a three-dimensional object includes an energy source to apply energy to a layer of build material to cause a first portion of the layer to coalesce and solidify, an agent distributor to selectively deliver a cooling agent onto a second portion of the layer, and a controller to control the energy source to apply energy to the layer to cause the first portion to coalesce and solidify in a first pattern and to control the agent distributor to selectively deliver the cooling agent onto the second portion of the layer in a second pattern independent of the first pattern.Type: ApplicationFiled: January 21, 2019Publication date: May 23, 2019Inventors: Krzysztof Nauka, Esteve Comas, Alejandro Manuel De Pena, Howard S. Tom, Hou T. Ng
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Publication number: 20190152134Abstract: To additively manufacture a 3D object, a layer of material is deposited onto a receiving surface. Droplets are selective deposited onto first portions of the layer with at least some droplets including at least a first color agent. A gas discharge illuminant selectively induces a first amount of heating in the first portions of the layer substantially greater than a second amount of heating in second portions of the layer omitting the first color agent.Type: ApplicationFiled: July 19, 2016Publication date: May 23, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Krzysztof Nauka, Howard S. Tom, Kristopher Li
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Publication number: 20190092799Abstract: An example of a fusing agent includes a metal bis(dithiolene) complex, a thiol surfactant, a polar aprotic solvent, and a balance of water. In an example of a method of making the fusing agent, the metal bis(dithiolene) complex is exposed to an aqueous solution including a reducing agent and a thiol surfactant to form a reduced metal bis(dithiolene) complex and to dissolve the reduced metal bis(dithiolene) complex in the aqueous solution. The aqueous solution is incorporated into a vehicle including a water soluble organic solvent and an additive selected from the group consisting of an emulsifier, a surface tension reduction agent, a wetting agent, a scale inhibitor, an anti-deceleration agent, a chelating agent, an antimicrobial agent, and a combination thereof. The fusing agent may be utilized in a three-dimensional printing method and/or incorporated into a three-dimensional printing system.Type: ApplicationFiled: February 6, 2017Publication date: March 28, 2019Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Paul OLUBUMMO, Lihua ZHAO, Aja HARTMAN, Howard S. TOM, Kristopher J. ERICKSON
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Patent number: 10240059Abstract: A cationic latex fixative for ink applications is provided. The cationic latex fixative derived from a combination of a cationic monomer, a nonionic monomer that provides softness to the latex, and a nonionic monomer that provide stiffness to the latex. A method of manufacturing the fixative and a method of printing the fixative are also provided.Type: GrantFiled: December 6, 2013Date of Patent: March 26, 2019Assignee: Hewlett-Packard Development Company, L.P.Inventors: Yan Zhao, Howard S. Tom, Hou T. Ng
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Publication number: 20190077080Abstract: In an example of a three-dimensional (3D) printing method, a polymeric or polymeric composite build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The fusing agent includes a discolorable near-infrared absorbing dye, a thiol surfactant, a reducing agent, and a balance of water. Near-infrared radiation is applied to the polymeric or polymeric composite build material at a condition that maintains a temperature of the selectively applied fusing agent below a decomposition temperature of the fusing agent and that allows the discolorable near-infrared absorbing dye to harvest near-infrared radiation energy, in order to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer and to initiate discoloration of the discolorable near-infrared absorbing dye in the layer.Type: ApplicationFiled: February 6, 2017Publication date: March 14, 2019Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Yan ZHAO, Lihua ZHAO, Paul OLUBUMMO, Aja HARTMAN, Howard S. TOM
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Patent number: 10220564Abstract: A three-dimensional object may be generated. Energy may be applied to a layer of build material to cause a first portion of the layer to coalesce and solidify in a first pattern. A cooling agent may be selectively delivered on a second portion of the layer of the build material to reduce a temperature of the second portion in a second pattern, the first and second patterns being independent of each other.Type: GrantFiled: January 31, 2014Date of Patent: March 5, 2019Assignee: Hewlett-Packard Development Company, L.P.Inventors: Krzysztof Nauka, Esteve Comas, Alejandro Manuel De Pena, Howard S. Tom, Hou T. Ng
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Publication number: 20190048219Abstract: An example of a fusing agent includes a tetraphenyldiamine-based dye, alkyldiphenyloxide disulfonate, 1-methyl-2-pyrrolidone, and a balance of water. The fusing agent excludes a strong reducing species. The fusing agent may be incorporated into a three-dimensional printing method or a three-dimensional printing system. In an example of the three-dimensional printing method, a polymeric or polymeric composite build material is applied. The fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The polymeric or polymeric composite build material is exposed to electromagnetic radiation to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer.Type: ApplicationFiled: February 6, 2017Publication date: February 14, 2019Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Paul OLUBUMMO, Lihua ZHAO, Kristopher J. ERICKSON, Howard S. TOM, Aja HARTMAN
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Publication number: 20190030800Abstract: In an example of a three-dimensional (3D) printing method, a crystalline or semi-crystalline build material is applied. A temperature of the crystalline or semi-crystalline build material is maintained within 100° C. below a melting point of the crystalline or semi-crystalline build material. A melt flow property reduction agent is applied to at least a portion of the crystalline or semi-crystalline build material, and the at least the portion of the crystalline or semi-crystalline build material in contact with the melt flow property reduction agent melts or coalesces at the temperature.Type: ApplicationFiled: May 12, 2016Publication date: January 31, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Stephen G. Rudisill, Alexey S Kabalnov, Kristopher J. Erickson, Howard S Tom, Lihua Zhao
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Publication number: 20190030801Abstract: The present disclosure is drawn material sets, coalescent fluids, and 3-dimensional printing systems. An example material set can include an amorphous polymer powder having an average particle size from 1 micron to 300 microns, and a coalescent fluid including a viscosity reducing agent.Type: ApplicationFiled: May 12, 2016Publication date: January 31, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Kristopher J. Erickson, Howard S Tom, Lihua Zhao, Ali Emamjomeh
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Publication number: 20190030788Abstract: In an example of a three-dimensional (3D) printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. A mechanical tailoring agent is selectively applied on at least a region of the portion. The polymeric build material is exposed to radiation, thereby fusing the at least the portion of the polymeric build material in contact with the fusing agent to form a layer. The mechanical tailoring agent forms a composite layer in the at least the region, and the composite layer has a different mechanical property than that of an area of the layer not in contact with the mechanical tailoring agent.Type: ApplicationFiled: May 12, 2016Publication date: January 31, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Kristopher J. Erickson, Lihua Zhao, Howard S. Tom, Aja Hartman, Yan Zhao, Andrew E. Fitzhugh
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Publication number: 20190001558Abstract: According to an example, a composition may include a high melt temperature build material in the form of a powder; a first low melt temperature binder in the form of a powder; and a second low melt temperature binder in the form of a powder, and in which the first low melt temperature binder melts at a temperature that is different from the second low melt temperature binder.Type: ApplicationFiled: April 27, 2016Publication date: January 3, 2019Applicant: Hewlett-Packard Development Company, L.P.Inventors: Krzysztof Nauka, Kristopher J. Erickson, Howard S. Tom, Lihua Zhao
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Publication number: 20180354191Abstract: A three-dimensional (3D) printing method includes applying a build material composition having a polymer particle and a radiation absorbing additive mixed with the polymer particle, the radiation absorbing additive being selected from the group consisting of inorganic near-infrared absorbers, organic near-infrared absorbers, and combinations thereof. The build material composition is preheated to a temperature below the melting temperature of the polymer particle by exposing the build material composition to radiation, the radiation absorbing additive increasing radiation absorption and accelerating the pre-heating of the build material composition. A fusing agent is selectively applied on at least a portion of the build material composition. The method further includes exposing the build material composition to radiation, whereby at least the polymer particle in the at least the portion of the build material composition in contact with the fusing agent at least partially fuses.Type: ApplicationFiled: July 23, 2015Publication date: December 13, 2018Applicant: Hewlett-Packard Development Company, L.P.Inventors: Krzysztof Nauka, Howard S. Tom, Kristopher J. Erickson, Lihua Zhao, Sivapackia Ganapathiappan
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Publication number: 20180320009Abstract: The present disclosure is drawn to coalescent inks and material sets, such as for 3D printing. In one example, the coalescent ink can include a conjugated polymer, a colorant imparting a visible color to the coalescent ink, and an ink vehicle comprising a high boiling point co-solvent having a boiling point of 250° C. or greater. The high boiling point co-solvent can be present in an amount from about 1 wt % to about 4 wt % with respect to the coalescent ink.Type: ApplicationFiled: January 27, 2016Publication date: November 8, 2018Inventors: Sivapackia GANAPATHIAPPAN, Howard S. TOM, Yan ZHAO, Kristopher J. ERICKSON, Krzysztof NAUKA, Lihua ZHAO
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Publication number: 20180272601Abstract: In an example of a method for forming three-dimensional (3D) printed electronics, a build material is applied. A fusing agent is selectively applied on at least a portion of the build material. The build material is exposed to radiation and the portion of the build material in contact with the fusing agent fuses to form a layer. An electronic agent is selectively applied on at least a portion of the layer, which imparts an electronic property to the at least the portion of the layer.Type: ApplicationFiled: October 29, 2015Publication date: September 27, 2018Applicant: Hewlett-Packard Development Company, L.P.Inventors: Kristopher J. Erickson, Thomas Anthony, Howard S. Tom, Sivapackia Ganapathiappan, Lihua Zhao, Krzysztof Nauka
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Publication number: 20180272427Abstract: Apparatus and methods for making metal-connected particle articles. A metal containing fluid is selectively applied to a layer of particles. The metal in the fluid is used to form metal connections between particles. The metal connections are formed at temperatures below the sintering temperature of the particles in the layer of particles.Type: ApplicationFiled: January 29, 2016Publication date: September 27, 2018Inventors: Kris J ERICKSON, Krzysztof Nauka, Tom Anthony, Lihua Zhao, Howard S Tom
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Publication number: 20180147629Abstract: Example described herein include a three-dimensional printer a threedimensional printing device that includes a fusible material applicator to apply a layer of fusible material, a inhibiting material applicator to apply a patterned layer of inhibiting material to establish exposed regions of the layer of fusible material and blocked regions of the layer of fusible material based on information corresponding to a three-dimensional model, and a photonic energy emitter to apply photonic energy to fuse the exposed regions of the layer of fusible material.Type: ApplicationFiled: July 31, 2015Publication date: May 31, 2018Inventors: Krzysztof Nauka, Sivapackia Ganapathiappan, Howard S Tom, Kris J Erickson
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Patent number: 9981857Abstract: A method for manufacturing low effective density TiO2 includes providing a template having a surface. The template surface is coated with a titanium-containing compound that can be reduced to TiO2 at high temperature. The template is removed, thereby forming porous TiO2 particles. The effective density of the porous TiO2 particles is less than 4.Type: GrantFiled: November 17, 2017Date of Patent: May 29, 2018Assignee: Hewlett-Packard Development Company, L.P.Inventors: Yan Zhao, Howard S. Tom, Hou T. Ng
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Publication number: 20180126631Abstract: A three-dimensional printing build material composition includes a polymer particle, and a radiation absorbing additive mixed with the polymer particle. The radiation absorbing additive has a particle size ranging from about 1 ?m to about 100 ?m, and the radiation absorbing additive is to absorb incident radiation having wavelengths ranging from 700 nm to 10 ?m.Type: ApplicationFiled: July 23, 2015Publication date: May 10, 2018Applicant: Hewlett-Packard Development Company, L.P.Inventors: Krzysztof Nauka, Howard S. Tom, Kristopher J. Erickson, Lihua Zhao, Sivapackia Ganapathiappan