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).

  • Patent number: 10689505
    Abstract: 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: Grant
    Filed: June 11, 2015
    Date of Patent: June 23, 2020
    Assignee: Merck Patent GmbH
    Inventors: Ulrich Quittmann, Volker Wilhelm, Hans-Juergen Brehm
  • Publication number: 20170152372
    Abstract: 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: Application
    Filed: June 11, 2015
    Publication date: June 1, 2017
    Applicant: Merck Patent GmbH
    Inventors: Ulrich QUITTMANN, Volker WILHELM, Hans-Juergen BREHM
  • Publication number: 20160145421
    Abstract: The present invention relates to microspheres, to a process for the production thereof, and to the use thereof, preferably as laser-absorbing additive.
    Type: Application
    Filed: May 30, 2014
    Publication date: May 26, 2016
    Applicant: Merck Patent GmbH
    Inventors: Volker WILHELM, Hans-Juergen BREHM
  • Patent number: 8647429
    Abstract: 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: Grant
    Filed: February 2, 2011
    Date of Patent: February 11, 2014
    Assignee: Merck Patent GmbH
    Inventors: Sabine Melson, Volker Wilhelm, Ulrich Schoenefeld
  • Patent number: 8613800
    Abstract: 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: Grant
    Filed: April 9, 2009
    Date of Patent: December 24, 2013
    Assignee: Merck Patent GmbH
    Inventors: Volker Wilhelm, Hans Jurgen Brehm
  • Publication number: 20120308667
    Abstract: 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: Application
    Filed: February 2, 2011
    Publication date: December 6, 2012
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Sabine Melson, Volker Wilhelm, Ulrich Schoenefeld
  • Publication number: 20110088595
    Abstract: 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: Application
    Filed: April 9, 2009
    Publication date: April 21, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Volker Wilhelm, Hans Jurgen Brehm
  • Patent number: 7648201
    Abstract: 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: Grant
    Filed: February 8, 2006
    Date of Patent: January 19, 2010
    Inventor: Volker Wilhelm Eysing
  • Patent number: 7320503
    Abstract: 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: Grant
    Filed: July 6, 2005
    Date of Patent: January 22, 2008
    Assignees: Provenda Marketing AG
    Inventor: Volker Wilhelm Eysing
  • Patent number: 5167708
    Abstract: 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: Grant
    Filed: March 23, 1992
    Date of Patent: December 1, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Wilhelm, Dieter Messer
  • Patent number: 4985078
    Abstract: 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: Grant
    Filed: May 30, 1989
    Date of Patent: January 15, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jakob Rademachers, Volker Wilhelm, Siegfried Keifer, Wilfried Burow
  • Patent number: 4919723
    Abstract: 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: Grant
    Filed: November 21, 1988
    Date of Patent: April 24, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Wilhelm, Manfred Mansmann
  • Patent number: 4919726
    Abstract: 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: Grant
    Filed: January 18, 1989
    Date of Patent: April 24, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jakob Rademachers, Volker Wilhelm
  • Patent number: 4450012
    Abstract: 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: Grant
    Filed: September 8, 1982
    Date of Patent: May 22, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Messer, Volker Wilhelm, Robert Endres, Heinrich Heine