Patents by Inventor Stephan Wendel

Stephan Wendel 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).

  • Publication number: 20220411566
    Abstract: The invention relates to a process for producing polyurethanes using a component A comprising a polyhydrazide, a polysemicarbazide, a polysulfonyl hydrazide and/or carbodihydrazide, in particular a polyhydrazide, wherein the component A is employed in the form of a mixture C which further comprises a component B comprising a dispersion medium.
    Type: Application
    Filed: July 13, 2020
    Publication date: December 29, 2022
    Applicant: Evonik Operations GmbH
    Inventors: Eva Emmrich-Smolczyk, Mladen Vidakovic, Stephan Wendel, Juan Jesus Burdeniuc
  • Patent number: 10988566
    Abstract: Additives for making polyurethanes are disclosed. The additives are based on combining specific carboxylic acids or carboxylic di-acids together with a gelling catalysts obtained when mixing an isocyanate-reactive tertiary amine catalysts with dimethyl tin di carboxylate salts and/or dimethyltin mercaptide salts.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: April 27, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Juan Jesus Burdeniuc, Stephan Wendel, Christian Brandl, Torsten Panitzsch, Renee Jo Keller
  • Patent number: 10815351
    Abstract: Disclosed are a process of producing a polyurethane foam product, a polyurethane foam product pre-mix, polyurethane foam product formulation, and a polyurethane foam product. The process of producing the polyurethane foam product includes contacting a halohydrin component with a polyurethane foam product pre-mix. The polyurethane foam product pre-mix includes the halohydrin component. The polyurethane foam product formulation includes a polyol component, an isocyanate component, and a halohydrin component. The polyurethane foam product is formed by the pre-mix having the halohydrin component.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: October 27, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Juan Jesus Burdeniuc, Boxun Leng, Torsten Panitzsch, Stephan Wendel, Renee Jo Keller
  • Publication number: 20190100638
    Abstract: Disclosed are a process of producing a polyurethane foam product, a polyurethane foam product pre-mix, polyurethane foam product formulation, and a polyurethane foam product. The process of producing the polyurethane foam product includes contacting a halohydrin component with a polyurethane foam product pre-mix. The polyurethane foam product pre-mix includes the halohydrin component. The polyurethane foam product formulation includes a polyol component, an isocyanate component, and a halohydrin component. The polyurethane foam product is formed by the pre-mix having the halohydrin component.
    Type: Application
    Filed: December 3, 2018
    Publication date: April 4, 2019
    Inventors: Juan Jesus Burdeniuc, Boxun Leng, Torsten Panitzsch, Stephan Wendel, Renee Jo Keller
  • Publication number: 20190016844
    Abstract: Additives for making polyurethanes are disclosed. The additives are based on combining specific carboxylic acids or carboxylic di-acids together with a gelling catalysts obtained when mixing an isocyanate-reactive tertiary amine catalysts with dimethyl tin di carboxylate salts and/or dimethyltin mercaptide salts.
    Type: Application
    Filed: September 19, 2018
    Publication date: January 17, 2019
    Inventors: Juan Jesus Burdeniuc, Stephan Wendel, Christian Brandl, Torsten Panitzsch, Renee Jo Keller
  • Publication number: 20180214857
    Abstract: The present invention provides compounds produced by the reaction of glycidyl ethers and glycidyl esters with ether compounds including N,N,N?-trimethyl-bis-(aminoethyl) ether. N,N,N?-trimethyl-bis-(aminoethyl) ether and its derivatives can be used as polyurethane catalysts.
    Type: Application
    Filed: January 29, 2018
    Publication date: August 2, 2018
    Inventors: Juan Jesus Burdeniuc, Stephan Wendel, John William Mitchell
  • Publication number: 20070235691
    Abstract: A composition for making a polyurethane foam includes a non-fugitive tertiary amine urethane catalyst and an ester alcohol or substituted carbamate thereof. Foams prepared from the reaction of a polyol and an organic isocyanate in the presence of these ingredients show excellent resistance to deterioration of physical properties upon humid ageing.
    Type: Application
    Filed: June 15, 2007
    Publication date: October 11, 2007
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Juan Burdeniuc, Stephan Wendel, Renee Keller
  • Publication number: 20070219283
    Abstract: A composition for making a polyurethane foam includes a non-fugitive tertiary amine urethane catalyst and an aromatic diacid ester diol or substituted carbamate thereof. Foams prepared from the reaction of a polyol and an organic isocyanate in the presence of these ingredients show excellent resistance to deterioration of physical properties upon humid ageing.
    Type: Application
    Filed: March 14, 2006
    Publication date: September 20, 2007
    Inventors: Juan Burdeniuc, Stephan Wendel, Renee Keller
  • Publication number: 20050090386
    Abstract: A catalyst composition for catalyzing a polyurethane forming reaction includes a gelling catalyst and a blowing catalyst selected such that the resulting polyurethane foam has a low level of volatile and/or malodorous material in it. The gelling catalysts are selected from tertiary aminoalkyl substituted primary or secondary amines; and the blowing catalysts are selected from bis(aminoalkyl) ethers comprising alkanol moieties, primary amine moieties, or ureido moieties derived from such primary amine moieties.
    Type: Application
    Filed: November 29, 2004
    Publication date: April 28, 2005
    Inventors: Stephan Wendel, Steven Hulme, Mark Listemann, Reza Fard-Aghaie, Juan Burdeniuc
  • Publication number: 20020103268
    Abstract: Rigid foams containing urethane groups and predominantly isocyanurate groups are obtained by reaction of
    Type: Application
    Filed: January 3, 1995
    Publication date: August 1, 2002
    Inventors: ROLF WIEDERMANN, STEPHAN WENDEL, WOLFGANG SCHMITZ
  • Patent number: 5367000
    Abstract: Rigid foams containing urethane and isocyanurate groups are obtained by using of mixtures of i) n-pentane and/or isopentane and ii) cyclopentane as blowing agents.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: November 22, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Wiedermann, Stephan Wendel, Ulrich Weber
  • Patent number: 5268509
    Abstract: This invention relates to a process for the preparation of an iron catalyst used for the hydrogenation of organic compounds comprising partially oxidizing iron or an iron alloy in particulate form at an elevated temperature in the presence of gaseous oxygen until a weight gain of from 5% to 32% is obtained; and then reducing the partially oxidized iron or iron alloy at an elevated temperature in a stream of hydrogen.The invention also relates to a process for the preparation of primary amines comprising catalytically hydrogenating nitriles corresponding to said primary amines in the presence of an iron catalyst of the invention.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: December 7, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Immel, Dietrich Liebsch, Hans-H. Schwarz, Stephan Wendel, Peter Fischer