Patents by Inventor Willi Riegel

Willi Riegel 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).

  • Method for producing hollow bodies having enclosed freely displaceable particles
    Patent number: 9181136
    Abstract: The invention relates to a method for producing hollow bodies having freely displaceable particles enclosed in the hollow body, wherein a) a gel-forming liquid in which the particles are suspended is brought into a cross-linking bath, b) the gel cores that form are isolated, c) the cores are coated with a composition comprising sinterable material and a binder, and d) the coated cores are subjected to a heat treatment wherein the gel and the binder are expunged and the sinterable material is sintered into a closed shell. The gel forming material is, for example, sodium alginate, and the cross-linking bath comprises calcium ions. The particles are selected, for example, from ZrO2, Al2O3, TiO2, and SiO2 or mixtures thereof. The sinterable material is, for example, a metal powder such as carbonyl iron powder.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 10, 2015
    Assignee: BASF SE
    Inventors: Julien Courtois, Carsten Schips, Petra Lutz-Kahler, Willi Riegel, Mohammed Abboud
  • METHOD FOR PRODUCING HOLLOW BODIES HAVING ENCLOSED FREELY DISPLACEABLE PARTICLES
    Publication number: 20120295026
    Abstract: The invention relates to a method for producing hollow bodies having freely displaceable particles enclosed in the hollow body, wherein a) a gel-forming liquid in which the particles are suspended is brought into a cross-linking bath, b) the gel cores that form are isolated, c) the cores are coated with a composition comprising sinterable material and a binder, and d) the coated cores are subjected to a heat treatment wherein the gel and the binder are expunged and the sinterable material is sintered into a closed shell. The gel forming material is, for example, sodium alginate, and the cross-linking bath comprises calcium ions. The particles are selected, for example, from ZrO2, Al2O3, TiO2, and SiO2 or mixtures thereof. The sinterable material is, for example, a metal powder such as carbonyl iron powder.
    Type: Application
    Filed: January 19, 2011
    Publication date: November 22, 2012
    Applicant: BASF SE
    Inventors: Julien Courtois, Carsten Schips, Petra Lutz-Kahler, Willi Riegel, Mohammed Abboud
  • PROCESS FOR PRODUCING AQUEOUS DISPERSIONS OF ALIPHATIC POLYCARBONATES
    Publication number: 20120264854
    Abstract: Processes for producing aqueous dispersions of aliphatic polycarbonates are described herein. A solution of the aliphatic polycarbonate in at least one aprotic, organic solvent comprising at least 50% by volume ethyl acetate based on the total amount of the organic solvent is provided. The aliphatic polycarbonate solution is emulsified in an aqueous emulsification medium in the presence of at least one surface-active substance to produce an aqueous emulsion of the aliphatic polycarbonate solution. The apriotic, organic solvent is removed from the emulsion by vaporization.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 18, 2012
    Applicant: BASF SE
    Inventors: JULIEN COURTOIS, Martin Schneele, Willi Riegel, Hubertus Kröner
  • Modified polyurethane foamed materials used as adsorbents
    Patent number: 6855739
    Abstract: The invention relates to polyurethane foams comprising (i) ethylenimine, polyethylenimine, polyvinylamine, polyvinylamine copolymers, carboxymethylated polyethylenimines, phosphonomethylated polyethylenimines, quarternized polyethylenimines and/or dithiocarbamatized polyethylenimines or (ii) alkali hydroxides and/or alkaline earth metal hydroxides or a mixture consisting of both (i) and (ii).
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: February 15, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Armin Becker, Bernd Bruchmann, Andreas Arlt, Ulrich Treuling, Rainer Rahm, Jürgen Decker, Ulrich Steuerle, Martin Kreyenschmidt, Willi Riegel, Werner Bertleff
  • Polyurethane foams
    Publication number: 20040198851
    Abstract: The invention relates to polyurethane foams comprising
    Type: Application
    Filed: April 26, 2004
    Publication date: October 7, 2004
    Applicant: BASF Aktiengesellschaft
    Inventors: Armin Becker, Bernd Bruchmann, Andreas Arlt, Ulrich Treuling, Rainer Rahm, Juergen Decker, Ulrich Steuerle, Martin Kreyenschmidt, Willi Riegel, Werner Bertleff
  • Modified polyurethane foamed materials used as adsorbents
    Publication number: 20030158279
    Abstract: The invention relates to polyurethane foamed materials containing: (i) ethylene imine, polyethylene imine, polyvinylamine, polyvinylamine copolymers, carboxymethylated polyethylene imines, phosphonomethylated polyethylene imines, quarternized polyethylene imines and/or dithiocarbamatized polyethylene imines or; (ii) alkali hydroxides and/or alkaline-earth hydroxides or; a mixture consisting of both (i) and (ii).
    Type: Application
    Filed: October 28, 2002
    Publication date: August 21, 2003
    Inventors: Armin Becker, Bernd Bruchmann, Andreas Arlt, Ulrich Treuling, Rainer Rahm, Jurgen Decker, Ulrich Steuerle, Martin Kreyenschmidt, Willi Riegel, Werner Bertleff
  • Plugging compound for chemical fastening
    Patent number: 5854305
    Abstract: A plugging compound for the chemical fastening of anchor bolts, threaded sleeves and screws in drill-holes, comprising a reactive resin and--spatially separated therefrom--a curing agent for the resin, includes from 0.0005 to 2% by weight of a piperidinyl or tetrahydropyrrolyl nitroxide as inhibitor in the reactive resin.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: December 29, 1998
    Assignee: DSM Resins B.V.
    Inventors: Stefan Schwiegk, Wolfgang Hubinger, Thomas Folda, Peter Ittemann, Willi Riegel, Monika Moench, Peter Mauthe