Patents Assigned to dmc
  • Patent number: 6541112
    Abstract: Rare earth manganese oxides are used as pigments. The pigments are preferably of the formula (RexMn)Oy, where Re is at least one element selected from Y, La and Lanthanide elements, x is from 0.01 to 99, and y is the number required to maintain electroneutrality. Preferred rare earth elements include Y, La, Pr and Nd. The pigments are useful as colorants, and may possess improved reflectance characteristics in the infrared region, thereby reducing IR-induced heat buildup.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: April 1, 2003
    Assignee: DMC2 Degussa Metals Catalysts Cerdec AG
    Inventors: Daniel Russell Swiler, Enos Ayres Axtell, III
  • Patent number: 6531181
    Abstract: The invention relates to a process for producing a conductive coating on glass and enamelled steel using a screen-printable aluminum paste. The paste to be used contains: 40 to 80 wt. %, in particular, 50 to 75 wt. % aluminum powder; 5 to 40 wt. %, in particular, 9 to 25 wt. % glass frit having an initial softening temperature of 400 to 700° C., in particular, 420 to 580° C.; 10 to 35 wt. % of a liquid or thermoplastic medium; and 0 to 10 wt. % sintering aid. The substrate coated with the paste is heated at 500 to 750° C., in particular, 590 to 690° C. The coating on the substrate is characterized by having a low specific resistance of less than 100 &mgr;ohm·cm, in particular in the range of 10 to 70 &mgr;ohm·cm, and good adhesion.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: March 11, 2003
    Assignee: DMC
    Inventors: Axel Niemann, Guy Roche
  • Patent number: 6524992
    Abstract: A single layer high performance catalyst containing on an inert carrier body a catalytic coating comprising platinum, rhodium and various oxide materials. The catalyst contains a catalytic coating having at least one first support material selected from the group having a first active alumina, a ceria rich ceria/zirconia mixed oxide and a zirconia component, said at least one first support material being catalyzed with a first part of the total platinum amount of the catalyst, and a second support material catalyzed with the second part of the total platinum amount and with rhodium said second support material being a second active alumina.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: February 25, 2003
    Assignee: DMC2 Degussa Metals Catalysts Cerdac AG
    Inventors: Lothar Mussmann, Dieter Lindner, Martin Votsmeier, Egbert Lox, Thomas Kreuzer
  • Patent number: 6517794
    Abstract: A method for removing nitrogen oxides from a lean flue gas. The method is carried out by: a) treating the flue gas in an electrical gas discharge, b) passing the thus treated flue gas over a basic storage material to store the nitrogen oxides in the form of nitrates and release of the treated flue gas to the environment, and c) regeneration of the storage material after depletion of its storage capacity by removing the storage material from the flue gas stream and treating it was a reducing regenerative gas stream while forming ammonia.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: February 11, 2003
    Assignee: DMC
    Inventors: Jürgen Gieshoff, Jürgen Lang
  • Patent number: 6503310
    Abstract: Laser markable coatings include a marking pigment and a fixing material. The marking pigment may comprise titanium dioxide, zinc oxide, zinc sulfide or the like. The fixing material may comprise bismuth trioxide, antimony oxide and the like, and preferably has a melting temperature below 1,300° C. A preferred laser marking composition includes TiO2 and Bi2O3 in a weight ratio of about 1:1. After application to a substrate and laser irradiation, the fixing material stabilizes the resultant mark.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: January 7, 2003
    Assignee: DMC2 Degussa Metals Catalysts Cerdec AG
    Inventor: Robert Michael Sullivan
  • Patent number: 6503316
    Abstract: The present invention relates to additive, pigment or colorant materials which may be used for laser marking. The materials comprise oxides of bismuth and at least one additional metal. Preferred laser-markable bismuth-containing oxide compounds are of the formula BixMyOz, where M is at least one metal selected from Zn, Ti, Fe, Cu, Al, Zr, P, Sn, Sr, Si, Y, Nb, La, Ta, Pr, Ca, Mg, Mo, W, Sb, Cr, Ba and Ce, x is from about 0.3 to about 70, y is from about 0.05 to about 8, and z is from about 1 to about 100. The bismuth-containing material may be dispersed in a substrate which is subsequently irradiated by a laser to provide a contrasting mark in the irradiated region.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: January 7, 2003
    Assignee: DMC2 Degussa Metals Catalysts Cerdec AG
    Inventors: George Emil Sakoske, Joseph E. Sarver
  • Patent number: 6485557
    Abstract: Manganese vanadium oxides are used as pigments. The mnanganese vanadium oxide pigments are of the formula Mn2V2O7. The, pigments are useful as colorants, and also possess improved reflectance characteristics in the infrared region, thereby reducing IR-induced heat buildup.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: November 26, 2002
    Assignee: DMC
    Inventor: Daniel Russell Swiler
  • Patent number: 6416868
    Abstract: Alkaline earth-manganese oxides are used as pigments. The alkaline earth-manganese oxide pigments are preferably of the formula MexMnOy, where Me is at least one metal selected from Ca, Sr, Ba and Mg, x is from 0.01 to 99, and y is greater than or equal to x+1 and less than or equal to x+2. The pigments are useful as colorants, and also possess improved reflectance characteristics, particularly in the IR region, and may reduce IR-induced heat buildup. These colorants can be used to form colored objects, or coat objects when they are either added into or applied onto materials such as paints, inks, plastics, glasses, ceramics and the like. The patent also covers the production of these pigments.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: July 9, 2002
    Assignee: DMC2 Degussa Metals Catalysts Cerdec AG
    Inventors: Robert Michael Sullivan, Terry James Detrie, Daniel Russell Swiler
  • Patent number: 6409794
    Abstract: A method for producing composite powders based on silver-tin oxide, by chemically reductive precipitation of silver onto particulate tin oxide. A solution of a silver compound and a solution of a reducing agent are simultaneously added in stoichiometrically equivalent amounts, separately and continuously with intensive mixing, to an aqueous suspension of tin oxide. The resulting composite powders have very high homogeneity, and can be processed to make electrical contact materials. The method is particularly suitable for producing composite powders based on silver-tin oxide doped with indium oxide, to be used in the manufacture of electrical contact materials.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: June 25, 2002
    Assignee: DMC
    Inventors: Roger Wolmer, Mechthild Mueller, Frank Heringhaus, Dietrich Ruehlicke, Dan Goia
  • Patent number: 6400732
    Abstract: A method and apparatus for determining synchronization and loss of synchronization in a high speed multiplexed data system. The system also includes a plurality of justification control bits and a backwards compatibility flag that allows the system to operate with older systems that have fewer justification control bits.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: June 4, 2002
    Assignee: DMC Stratex Networks, Inc.
    Inventors: Peter J. Castagna, David Randall
  • Patent number: 6391388
    Abstract: A process for producing a multicolored print by employing a color scanner that is capable of being profiled and an electronic image processor. Color data pertaining to color fields are taken as the basis for determining an algorithm for the printable color range and the separation, the color data being generated by employing ceramic colors of a multicolor set that are compatible with one another. With a view to producing four-color prints and also, in particular, seven-color prints that are truer to the original, four-color and seven-color sets as claimed are employed such as were taken as the basis for the color fields for determination of the algorithm. By means of seven-color printing, the color space is extended.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: May 21, 2002
    Assignee: dmc
    Inventors: Hans Hilgenfeld, Fritz Diefenbach, Karl Koch
  • Patent number: 6379449
    Abstract: Nitride or oxidenitride based red to yellow pigments, such as tantalum(V) nitride and oxidenitrides containing tantalum may be produced by passing ammonia over nitridable metal compounds, in particular oxide compounds, at 700 to 1250° C. According to the invention, nitriding proceeds in a rotary tube or fluidised bed reactor in the presence of an oxide from the series SiO2, ZrO2, GeO2, SnO2, TiO2 and HfO2 under conditions under which this oxide is substantially not nitrided.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: April 30, 2002
    Assignee: dmc
    Inventors: Martin Jansen, Eberhard Günther, Hans-Peter Letschert
  • Patent number: 6357868
    Abstract: The invention relates to a method of decorating hard materials, especially materials which can be fired for the purpose of decoration, by means of direct or indirect printing. Printing is carried out by means of inkjet technology. According to the invention, a colour paste containing at least 30 wt. % inorganic solids, such as pigments and glass frits, and a thermoplastic medium having a melting point of at least 30° C. is applied to the surface to be decorated by means of a heatable inkjet print head, which preferably additionally has a device for circulating the molten colour paste.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: March 19, 2002
    Assignee: dmc
    Inventors: Peter Pfaff, Maurizio Ragnetti
  • Patent number: 6355714
    Abstract: The invention relates to a noble metal preparation for producing noble metal decorations on decoratively fireable substrates by direct printing and indirect printing (transfer technique). The printing quality of the preparation containing noble metal compounds and a binder system can be improved in that the binder system comprises a resin mixture of a) 25 to 40 wt. % of polyamide resins, b) 5 to 30 wt. % of sulfurised recent resins, c) 20 to 55 wt. % of rosin-modified resins, d) 0 to 30 wt. % of alkylphenol resins and e) 0 to 30 wt. % of other resins compatible therewith or of the reaction products, formed at 50 to 150° C., of the resin mixture mentioned and/or the reaction products, formed at 50 to 150° C., of the resin mixture mentioned or the reaction products of same containing the noble metal compounds in the presence of a sulfur-containing gelling agent.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: March 12, 2002
    Assignee: dmc
    Inventors: Andreas Schulz, Elisabeth Zimmerbeutel, Susanne Keyn, Stephen J. Hackett
  • Patent number: 6350495
    Abstract: Hitherto, glazing defects have arisen during glazing of ceramic substrates with an electrostatically applicable coating powder. This problem is solved by the coating powder CPAB and the coating method. The electrostatically applicable coating powder CPAB contains 1 to 50 wt. % of a glass-forming composition A which begins softening at 400 to 750° C. and 99 to 50 wt. % of a glass-forming composition B which begins to soften above 750-1,100° C. Preferably, the coating powder consists of 2.5 to 25 wt. % A, 75 to 97.5 wt. % B and 0 to 20 wt. %, specially 2 to 10 wt. % of thermally or chemically activatable adhesive agents. The coating powder CPAB is electrostatically applied as a single powder. Alternately, coating can be applied in two layers, wherein the CPU powder contains at least 5 wt. % of glass-forming composition A as a lower layer and the powder CPO contains at least 50 wt. % of glass-forming composition B as an upper layer.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: February 26, 2002
    Assignee: dmc
    Inventors: Andreas Schriener, Herbert Triptrap, Philip Robert Jackson, Steven Charles Withington, David Shingler
  • Patent number: 6350421
    Abstract: A nitrogen oxide storage material is disclosed which contains at least one storage component for nitrogen oxides in the form of an oxide, mixed oxide, carbonate or hydroxide of the alkaline earth metals magnesium, calcium, strontium and barium and the alkali metals potassium and caesium on a high surface area support material. The support material can be doped cerium oxide, cerium/zirconium mixed oxide, calcium titanate, strontium titanate, barium titanate, barium stannate, barium zirconate, magnesium oxide, lanthanum oxide, praseodymium oxide, samarium oxide, neodymium oxide, yttrium oxide, zirconium silicate, yttrium barium cuprate, lead titanate, tin titanate, bismuth titanate, lanthanum cobaltate, lanthanum manganate and barium cuprate or mixtures thereof.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: February 26, 2002
    Assignee: dmc
    Inventors: Wolfgang Strehlau, Ulrich Göbel, Lothar Mussmann, Rainer Domesle
  • Patent number: 6342465
    Abstract: A process for preparing a catalyst which has a catalytically active coating of high surface area finely divided materials and catalytically active components on an inert carrier structure. A powder mixture of the finely divided materials used is impregnated with a solution of precursor compounds of the catalytically active components. By suitable combination of the finely divided materials and the precursor compounds and appropriate management of the impregnation process, a highly dispersed deposition and adsorption of the catalytically active components is ensured on the finely divided materials. Then ai aqueous coating dispersion is produced using the impregnated powder mixture and the carrier structure is coated therewith. The coating is then dried and calcined.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: January 29, 2002
    Assignee: DMC2 Degussa Metals
    Inventors: Harald Klein, Jürgen Leyrer, Rainer Domesle, Egbert Lox, Thomas Kreuzer
  • Patent number: 6303679
    Abstract: The invention relates to a noble metal preparation for producing noble metal decorations on decoratively fireable substrates by direct printing and indirect printing (transfer technique). The printing quality of the preparation containing noble metal compounds and a binder system can be improved in that the binder system comprises a resin mixture of a) 25 to 40 wt. % of polyamide resins, b) 5 to 30 wt. % of sulfurised recent resins, c) 20 to 55 wt. % of rosin-modified resins, d) 0 to 30 wt. % of alkylphenol resins and e) 0 to 30 wt. % of other resins compatible therewith or of the reaction products, formed at 50 to 150° C., of the resin mixture mentioned and/or the reaction products, formed at 50 to 150° C., of the resin mixture mentioned or the reaction products of same containing the noble metal compounds in the presence of a sulfur-containing gelling agent.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: October 16, 2001
    Assignee: dmc
    Inventors: Andreas Schulz, Elisabeth Zimmerbeutel, Susanne Keyn, Stephen J. Hackett
  • Publication number: 20010028009
    Abstract: Skein support bow having a length approximately identical to that of the skein, having the shape of a strip made of flexible material and including two ends, wherein each of said ends terminates in a double hook for housing a loop of the said skein, the said strip including an excrescence, in its central part, of dimensions such that it can take a label on which a reference of the said skein is indicated.
    Type: Application
    Filed: April 5, 2001
    Publication date: October 11, 2001
    Applicant: Dollfus & Mieg Cie-DMC
    Inventors: Thomas Derevoge Philippe, Jean Paul Ganaye
  • Publication number: 20010028928
    Abstract: Label intended to go around a skein of yarns or the like, which comprises a projecting part extended by a tab which can be folded down inside a loop of the said skein so as to neatly separate of the said yarns by creating the said loop in a permanent way, and to limit any relative slip of the label with respect to the said skein
    Type: Application
    Filed: April 5, 2001
    Publication date: October 11, 2001
    Applicant: Dollfus & Mieg Cie - DMC
    Inventors: Philippe Thomas Derevoge, Jean-Paul Ganaye