Patents by Inventor Thomas Scharfe
Thomas Scharfe 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: 7985792Abstract: A dispersion containing a high-surface-area, pyrogenically-produced aluminium oxide with a surface area and BET of more than 115 m2/g and a Sears number of more than 8 ml/2 g, is produced by mixing a high-surface-area, pyrogenically-produced aluminium oxide having a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2 g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introduction of controlled shearing forces. It can be used for the production of Inkjet media, digital imaging products and other printing medium.Type: GrantFiled: July 10, 2009Date of Patent: July 26, 2011Assignee: Evonik Degussa GmbHInventors: Heinz Lach, Gerrit Schneider, Thomas Scharfe
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Publication number: 20100092762Abstract: A dispersion containing a high-surface-area, pyrogenically-produced aluminium oxide with a surface area and BET of more than 115 m2/g and a Sears number of more than 8 ml/2 g, is produced by mixing a high-surface-area, pyrogenically-produced aluminium oxide having a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2 g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introduction of controlled shearing forces. It can be used for the production of Inkjet media, digital imaging products and other printing medium.Type: ApplicationFiled: July 10, 2009Publication date: April 15, 2010Inventors: Heinz Lach, Gerrit Schneider, Thomas Scharfe
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Patent number: 7572854Abstract: Aqueous dispersions of a pyrogenically-produced aluminum oxide are prepared form a mixture containing water, additives and a high-surface-area pyrogenically-produced aluminum oxide with a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2 g using controlled high shearing conditions. Prior to subjecting the mixture to high shear conditions, the pH of the mixture is adjusted to a value between of 2 to 11 (preferably 3 to 8). The aqueous dispersion has a mean particle size distribution of d50<150 nm. These dispersions are useful in the production of Inkjet media, digital imaging products and other printing media and result in high color densities, photo-realistic reproductions and particularly good print and gloss quality.Type: GrantFiled: October 22, 2002Date of Patent: August 11, 2009Assignee: Degussa AGInventors: Gerrit Schneider, Heinz Lach, Thomas Scharfe
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Patent number: 7241336Abstract: Pyrogenically produced aluminum-silicon mixed oxides with a BET surface of more than 300 m2/g and a composition of 0.01 to 99.99% by wt. AI2O3, remainder SiO2 are produced in accordance with the method of flame pyrolysis or preferably flame hydrolysis by a joint combustion of the gaseous raw substances. They can be used to produce coating colors, especially for inkjet papers or inkjet foils or other inkjet materials.Type: GrantFiled: July 22, 2002Date of Patent: July 10, 2007Assignee: Degussa GmbHInventors: Thomas Scharfe, Ronald Apel, Alfons Moster, Helmut Mangold, Ralph Brandes
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Publication number: 20060163533Abstract: Stable, aqueous dispersion containing powders A and B,—wherein powder A is an amorphous silicon dioxide powder having an average particle diameter of 0.05 to 0.7 ?m and a BET surface aa of 5 to 50 m2/g, and—wherein powder B is a metal oxide or non-metal oxide powder consisting of aggregates of intergrown primary particles and displays a primary particle size of 5 to 50 nm and a BET surface area of 50 to 400 m2/g. Coating slip to form an ink-absorptive coating using the dispersion and at least one hydrophilic binder. Absorptive medium using the coating slip and a support.Type: ApplicationFiled: November 18, 2003Publication date: July 27, 2006Inventors: Christoph Batz-Sohn, Thomas Scharfe, Wolfgang Lortz
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Patent number: 7015270Abstract: A stable, aqueous dispersion, which includes: silicon dioxide mixed-oxide particles dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol, said mixed-oxide including aluminum oxide or titanium dioxide, wherein said particles are produced by flame hydrolysis, wherein said particles have a BET specific surface area of 5 to 600 m2/g and a negative zeta potential, and wherein the dispersion has a positive zeta potential.Type: GrantFiled: January 27, 2003Date of Patent: March 21, 2006Assignee: Degussa AGInventors: Thomas Scharfe, Christoph Batz-Sohn, Wolfgang Lortz
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Patent number: 6808769Abstract: The present invention provides an aqueous dispersion containing at least two powder types selected from one or more metal oxide powders and/or one or more non-metal oxide powder. The present invention also provides a coating composition containing this dispersion, an inkjet recording medium containing the coating composition, and methods of making the same.Type: GrantFiled: March 24, 2003Date of Patent: October 26, 2004Assignee: Degussa AGInventors: Christoph Batz-Sohn, Thomas Scharfe, Wolfgang Lortz
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Patent number: 6695907Abstract: Dispersions of pyrogenic oxides, doped using an aerosol, are prepared by mixing the oxide with a suspending agent and milling. The dispersions can be used to prepare inkjet paper.Type: GrantFiled: November 18, 2002Date of Patent: February 24, 2004Assignee: Degussa AGInventors: Thomas Scharfe, Rainer Golchert, Helmut Mangold
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Publication number: 20040034144Abstract: A stable, aqueous dispersion, which includes:Type: ApplicationFiled: January 27, 2003Publication date: February 19, 2004Applicant: Degussa AGInventors: Thomas Scharfe, Christoph Batz-Sohn, Wolfgang Lortz
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Publication number: 20040025746Abstract: The present invention provides an aqueous dispersion containing at least two powder types selected from one or more metal oxide powders and/or one or more non-metal oxide powder. The present invention also provides a coating composition containing this dispersion, an inkjet recording medium containing the coating composition, and methods of making the same.Type: ApplicationFiled: March 24, 2003Publication date: February 12, 2004Applicant: DEGUSSA AGInventors: Christoph Batz-Sohn, Thomas Scharfe, Wolfgang Lortz
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Patent number: 6680109Abstract: Pyrogenically produced aluminum oxide, in which the BET specific surface area is greater than 115 m2/g and the Sears index is over 8 ml/2 g and the dibutyl phthalate absorption as a powder measured with a 16 g weighed portion is not measurable, is produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporizable aluminum compound is used as starting material. The aluminum oxide can be used as an ink-absorbing substance in inkjet media and also as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabilizer, in the paint industry.Type: GrantFiled: September 7, 2000Date of Patent: January 20, 2004Assignee: Degussa AGInventors: Peer Plambeck-Fischer, Volker Hamm, Thomas Scharfe, Helmut Mangold, Thomas Hennig
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Publication number: 20030124321Abstract: A dispersion containing a high-surface-area, pyrogenically-produced aluminium oxide with a surface area and BET of more than 115 m2/g and a Sears number of more than 8 ml/2 g, is produced by mixing a high-surface-area, pyrogenically-produced aluminium oxide having a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2 g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introduction of controlled shearing forces.Type: ApplicationFiled: October 22, 2002Publication date: July 3, 2003Inventors: Gerrit Schneider, Heinz Lach, Thomas Scharfe
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Publication number: 20030118499Abstract: Dispersions of pyrogenic oxides, doped using an aerosol, are prepared by mixing the oxide with a suspending agent and milling. The dispersions can be used to prepare inkjet paper.Type: ApplicationFiled: November 18, 2002Publication date: June 26, 2003Applicant: Degussa AGInventors: Thomas Scharfe, Rainer Golchert, Helmut Mangold
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Publication number: 20030095905Abstract: Pyrogenically produced aluminum-silicon mixed oxides with a BET surface of more than 300 m2/g and a composition of 0.01 to 99.99% by wt. Al2O3, remainder SiO2 are produced in accordance with the method of flame pyrolysis or preferably flame hydrolysis by a joint combustion of the gaseous raw substances. They can be used to produce coating colors, especially for inkjet papers or inkjet foils or other inkjet materials.Type: ApplicationFiled: July 22, 2002Publication date: May 22, 2003Inventors: Thomas Scharfe, Ronald Apel, Alfons Moster, Helmut Mangold, Ralph Brandes
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Publication number: 20010042493Abstract: Dispersions of pyrogenic oxides, doped using an aerosol, are prepared by mixing the oxide with a suspending agent and milling. The dispersions can be used to prepare inkjet paper.Type: ApplicationFiled: April 10, 2001Publication date: November 22, 2001Inventors: Thomas Scharfe, Rainer Golchert, Helmut Mangold