Patents by Inventor Douglas E. Knight
Douglas E. Knight 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: 8507054Abstract: An ink-jet recording medium is disclosed which comprises a paper substrate having a surface for receiving an ink-jet ink containing a pigmented colorant. The surface is treated with at least one co-crystalline salt, which become associated with the substrate surface. The co-crystalline salt is capable of crashing pigmented colorants on the paper surface, and its use may help protect paper manufacturing equipment from corrosion.Type: GrantFiled: May 30, 2008Date of Patent: August 13, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xiaoqi Zhou, Douglas E. Knight, Hai Quang Tran
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Patent number: 8449669Abstract: The present invention is drawn to a composition for cast-coating on ink-jet media. The composition includes a liquid vehicle, silica particulates, and an internal release agent. The composition is substantially free of polymeric binder and can improve the glossiness of a porous particulate-coated ink-receiving media by at least 2 gloss units at 20 degrees. The silica particulates can be suspended in the liquid vehicle at about 1-35 wt %, and can have a particle size of less than about 150 nm. The internal release agent can be present at about 0.5-10 wt %.Type: GrantFiled: October 31, 2011Date of Patent: May 28, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Eric L Burch, Douglas E Knight, Christopher Toles, David Rossing
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Patent number: 8425993Abstract: The present invention is directed to a medium (“substrate”) usable with inkjet printing apparatus (either or both piezoelectric and thermal inkjet, or other forms of inkjet printing), and methods for forming and using the same. In one embodiment, the substrate comprises a base material component and an image enhancing layer including a metallic salt disposed either or both on at least one side of the base medium and mixed within the base medium thereon. The present invention is further directed to printable articles including the same.Type: GrantFiled: October 3, 2006Date of Patent: April 23, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Douglas E Knight, Matthew D. Giere, Bor-Jiunn Niu, Betty Coulman
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Publication number: 20120279423Abstract: The present invention is drawn to a composition for cast-coating on ink-jet media. The composition includes a liquid vehicle, silica particulates, and an internal release agent. The composition is substantially free of polymeric binder and can improve the glossiness of a porous particulate-coated ink-receiving media by at least 2 gloss units at 20 degrees. The silica particulates can be suspended in the liquid vehicle at about 1-35 wt %, and can have a particle size of less than about 150 nm. The internal release agent can be present at about 0.5-10 wt %.Type: ApplicationFiled: October 31, 2011Publication date: November 8, 2012Inventors: Eric L. Burch, Douglas E. Knight, Christopher Toles, David Rossing
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Patent number: 8048497Abstract: The present invention is drawn to a composition for cast-coating on ink-jet media. The composition includes a liquid vehicle, silica particulates, and an internal release agent. The composition is substantially free of polymeric binder and can improve the glossiness of a porous particulate-coated ink-receiving media by at least 2 gloss units at 20 degrees. The silica particulates can be suspended in the liquid vehicle at about 1-35 wt %, and can have a particle size of less than about 150 nm. The internal release agent can be present at about 0.5-10 wt %.Type: GrantFiled: April 27, 2007Date of Patent: November 1, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventors: Eric L Burch, Douglas E Knight, Christopher Toles, David Rossing
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Publication number: 20110104406Abstract: An ink-jet recording medium is disclosed which comprises a paper substrate having a surface for receiving an ink-jet ink containing a pigmented colorant. The surface is treated with at least one co-crystalline salt, which become associated with the substrate surface. The co-crystalline salt is capable of crashing pigmented colorants on the paper surface, and its use may help protect paper manufacturing equipment from corrosion.Type: ApplicationFiled: May 30, 2008Publication date: May 5, 2011Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xiaoqi Zhou, Douglas E. Knight, Hai Quang Tran
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Patent number: 7704574Abstract: A printing arrangement can include an ink-receiving coating applied to a media substrate, the ink-receiving coating having a coating thickness being configured to have a concentration gradient relative to the thickness. In the concentration gradient, the concentration of a cationic agent is greater in a center region of the ink-receiving coating relative to an upper region and a lower region.Type: GrantFiled: January 4, 2008Date of Patent: April 27, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Eric L. Burch, Douglas E. Knight
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Patent number: 7641947Abstract: In one aspect of the present system and method, an inkjet recording medium includes a photobase layer, a layer of inorganic oxide dispensed on a first side of the photobase layer, and a layer of ink vehicle absorbing layer formed on a second side of the photobase layer.Type: GrantFiled: May 26, 2006Date of Patent: January 5, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Tienteh Chen, Douglas E. Knight, Tao Chen, Eric L. Burch
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Publication number: 20080268186Abstract: The present invention is drawn to a composition for cast-coating on ink-jet media. The composition includes a liquid vehicle, silica particulates, and an internal release agent. The composition is substantially free of polymeric binder and can improve the glossiness of a porous particulate-coated ink-receiving media by at least 2 gloss units at 20 degrees. The silica particulates can be suspended in the liquid vehicle at about 1-35 wt %, and can have a particle size of less than about 150 nm. The internal release agent can be present at about 0.5-10 wt %.Type: ApplicationFiled: April 27, 2007Publication date: October 30, 2008Inventors: Eric L. Burch, Douglas E. Knight, Christopher Toles, David Rossing
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Patent number: 7374800Abstract: A printing arrangement can include an ink-receiving coating applied to a media substrate, the ink-receiving coating having a coating thickness being configured to have a concentration gradient relative to the thickness. In the concentration gradient, the concentration of a cationic agent is greater in a center region of the ink-receiving coating relative to an upper region and a lower region.Type: GrantFiled: February 9, 2005Date of Patent: May 20, 2008Inventors: Eric L. Burch, Douglas E. Knight
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Publication number: 20080081203Abstract: The present invention is directed to a medium (“substrate”) usable with inkjet printing apparatus (either or both piezoelectric and thermal inkjet, or other forms of inkjet printing), and methods for forming and using the same. In one embodiment, the substrate comprises a base material component and an image enhancing layer including a metallic salt disposed either or both on at least one side of the base medium and mixed within the base medium thereon. The present invention is further directed to printable articles including the same.Type: ApplicationFiled: October 3, 2006Publication date: April 3, 2008Inventors: Douglas E. Knight, Matthew D. Giere, Bor-Jiunn Niu, Betty Coulman
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Publication number: 20070275190Abstract: In one aspect of the present system and method, an inkjet recording medium includes a photobase layer, a layer of inorganic oxide dispensed on a first side of the photobase layer, and a layer of ink vehicle absorbing layer formed on a second side of the photobase layer.Type: ApplicationFiled: May 26, 2006Publication date: November 29, 2007Inventors: Tienteh Chen, Douglas E. Knight, Tao Chen, Eric L. Burch
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Patent number: 6475612Abstract: A process is provided that allows the production of multi-layer coatings in which one or more topcoats can be applied to a porous basecoat to produce a uniform and defect-free coating layer. Specifically, a process is provided in which a liquid is applied to the basecoat prior to topcoating such that the air in the basecoat is removed prior to topcoating. This process can occur in-line with a simple apparatus described herein. An added benefit of this method is that it also allows the possibility of adding functionality or performing chemistry to a basecoat after the basecoat is dried and before the topcoat is applied in a single process. For example, the wetting fluid may contain, but is not limited to, surfactants, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers.Type: GrantFiled: January 27, 2000Date of Patent: November 5, 2002Assignee: Hewlett-Packard CompanyInventors: Douglas E. Knight, Yi-Hua Tsao, Eric L. Burch, Yubai Bi, Bor-Jiunn Niu, Peter C. Zahrobsky, Barbara A. Kumpf
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Publication number: 20020150688Abstract: A process is provided that allows the production of multi-layer coatings in which one or more topcoats can be applied to a porous basecoat to produce a uniform and defect-free coating layer. Specifically, a process is provided in which a liquid is applied to the basecoat prior to topcoating such that the air in the basecoat is removed prior to topcoating. This process can occur in-line with a simple apparatus described herein. An added benefit of this method is that it also allows the possibility of adding functionality or performing chemistry to a basecoat after the basecoat is dried and before the topcoat is applied in a single process. For example, the wetting fluid may contain, but is not limited to, surfactants, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers.Type: ApplicationFiled: January 27, 2000Publication date: October 17, 2002Inventors: Douglas E. Knight, Yi-Hua Tsao, Eric L. Burch, Yubai Bi, Bor-Jiunn Niu, Peter C. Zahrobsky, Barbara A. Kumpf