Patents by Inventor Volker Wilhelm
Volker Wilhelm 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: 10689505Abstract: The present invention relates to microspheres and to the use thereof, preferably as laser-absorbing additive, and to a process for the production thereof.Type: GrantFiled: June 11, 2015Date of Patent: June 23, 2020Assignee: Merck Patent GmbHInventors: Ulrich Quittmann, Volker Wilhelm, Hans-Juergen Brehm
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Publication number: 20170152372Abstract: The present invention relates to microspheres and to the use thereof, preferably as laser-absorbing additive, and to a process for the production thereof.Type: ApplicationFiled: June 11, 2015Publication date: June 1, 2017Applicant: Merck Patent GmbHInventors: Ulrich QUITTMANN, Volker WILHELM, Hans-Juergen BREHM
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Publication number: 20160145421Abstract: The present invention relates to microspheres, to a process for the production thereof, and to the use thereof, preferably as laser-absorbing additive.Type: ApplicationFiled: May 30, 2014Publication date: May 26, 2016Applicant: Merck Patent GmbHInventors: Volker WILHELM, Hans-Juergen BREHM
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Patent number: 8647429Abstract: The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.Type: GrantFiled: February 2, 2011Date of Patent: February 11, 2014Assignee: Merck Patent GmbHInventors: Sabine Melson, Volker Wilhelm, Ulrich Schoenefeld
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Patent number: 8613800Abstract: The present invention relates to pigment preparations comprising one or more effect pigments in platelet form, at least one antioxidant and a wax or wax mixture, and to the use thereof for pigmentation of application media, especially paints, coating materials, powder coating materials, polymers, and for production of masterbatches.Type: GrantFiled: April 9, 2009Date of Patent: December 24, 2013Assignee: Merck Patent GmbHInventors: Volker Wilhelm, Hans Jurgen Brehm
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Publication number: 20120308667Abstract: The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.Type: ApplicationFiled: February 2, 2011Publication date: December 6, 2012Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Sabine Melson, Volker Wilhelm, Ulrich Schoenefeld
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Publication number: 20110088595Abstract: The present invention relates to pigment preparations comprising one or more effect pigments in platelet form, at least one antioxidant and a wax or wax mixture, and to the use thereof for pigmentation of application media, especially paints, coating materials, powder coating materials, polymers, and for production of masterbatches.Type: ApplicationFiled: April 9, 2009Publication date: April 21, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Volker Wilhelm, Hans Jurgen Brehm
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Patent number: 7648201Abstract: The invention relates to a support element (11) for the human body, in particular to a backrest, of a chair or armchair. The support element (11) has a support face (21) that forms a front side of the support element. The support element is equipped with a self-adapting longitudinal structure (13), which includes at least one front, first longitudinal element (15), and at least one rear, second longitudinal element (17), extending parallel to the first longitudinal element (15), as well as a plurality of spacers (19), which are each pivotably connected to the first longitudinal element (15) and to the second longitudinal element (17). The second longitudinal element (17) is connected at a rigid angle to the first longitudinal element (15) at at least one connection point (27) and is borne at a support point (29) spaced apart from the connection point (27).Type: GrantFiled: February 8, 2006Date of Patent: January 19, 2010Inventor: Volker Wilhelm Eysing
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Patent number: 7320503Abstract: The invention relates to a backrest with a support area (71), at least one structure connected to the support area (71) or forming the support area (71), which structure (10) extends towards the top of the backrest from a first end region of the support area (71) to a second end region of the support area (71) and at the front has a tension element (49) and at the rear a pressure element (47). The tension element (49) connects the first end region (37) of the support area (71) to the second end region (38) of the support area (71) transmitting tensile forces. The pressure element (47) connects the first end region (37) of the support area (71) to the second end region (38) of the support area (71) transmitting thrust forces. Pressure element (47) and tension element (49) are in the extension direction non-displaceably connected to one another in the first and in the second end region of the support area (71).Type: GrantFiled: July 6, 2005Date of Patent: January 22, 2008Assignees: Provenda Marketing AGInventor: Volker Wilhelm Eysing
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Patent number: 5167708Abstract: A process for the preparation of chromate-free, Cr.sub.2 O.sub.3 -containing pigments having a spinel, haematite or corundum structure comprises blending pigment-forming raw materials corresponding to the Cr.sub.2 O.sub.3 -containing pigments with from 0.5 to 10% by weight of boric acid or phosphoric acid, calculated as B.sub.2 O.sub.3 or P.sub.2 O.sub.5, respectively, and then annealing the blend whereby the chromate-free, Cr.sub.2 O.sub.3 -containing pigment is obtained.Type: GrantFiled: March 23, 1992Date of Patent: December 1, 1992Assignee: Bayer AktiengesellschaftInventors: Volker Wilhelm, Dieter Messer
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Patent number: 4985078Abstract: Thermostable pigments for coloring stoving lacquers, coil coat lacquers, plastics, sand granulates, lime sandstone, enamel or ceramic glazes are zinc ferrite color pigments containing from 0.01 to 0.5% by weight of lithium.Type: GrantFiled: May 30, 1989Date of Patent: January 15, 1991Assignee: Bayer AktiengesellschaftInventors: Jakob Rademachers, Volker Wilhelm, Siegfried Keifer, Wilfried Burow
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Patent number: 4919723Abstract: Chromium-antimony-rutile mixed phase pigments containing from 0.01 to 0.25% by weight of lithium are surprisingly insensitive to rapid cooling and chilling and are used for coloring plastic compositions such as polyamide or ABS plastics.Type: GrantFiled: November 21, 1988Date of Patent: April 24, 1990Assignee: Bayer AktiengesellschaftInventors: Volker Wilhelm, Manfred Mansmann
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Patent number: 4919726Abstract: A process for the production of rutile mixed-phase pigments comprising calcinating of a solid mixture of titanium dioxide or titanium oxide hydroxide with a dye-producing compound of a metal, in one or more directly heated, continuously operated rotary kilns, wherein in terms of material flow, air is introduced into the kiln atmosphere countercurrently to the direction of flow of the solids in the second half of the rotary kiln.Type: GrantFiled: January 18, 1989Date of Patent: April 24, 1990Assignee: Bayer AktiengesellschaftInventors: Jakob Rademachers, Volker Wilhelm
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Patent number: 4450012Abstract: Coated rutile mixed phase pigments comprise a mixed phase rutile pigment having a first coating of an oxide or hydrated oxide of titanium, zirconium, tin or a mixture thereof and a subsequent coating of an oxide or hydroxide of aluminum, and those pigments exhibit an improved tendency against flocculation in lacquers hardened with acid catalysts.Type: GrantFiled: September 8, 1982Date of Patent: May 22, 1984Assignee: Bayer AktiengesellschaftInventors: Dieter Messer, Volker Wilhelm, Robert Endres, Heinrich Heine