Patents by Inventor Stefan Grasser

Stefan Grasser 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).

  • Process for the preparation of fluoroalkylnitriles and the corresponding fluoroalkyltetrazoles
    Patent number: 10899722
    Abstract: The present invention relates to a process for the preparation of fluoroalkylnitriles and the corresponding fluoroalkyltetrazoles starting from fluorinated carboxamides.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 26, 2021
    Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Albert Schnatterer, Jan Vermehren, Edith Beckmann, Claus-Christian Haeselhoff, Tim Hammerer, Stefan Grasser
  • PROCESS FOR THE PREPARATION OF FLUOROALKYLNITRILES AND THE CORRESPONDING FLUOROALKYLTETRAZOLES
    Publication number: 20190375721
    Abstract: The present invention relates to a process for the preparation of fluoroalkylnitriles and the corresponding fluoroalkyltetrazoles starting from fluorinated carboxamides.
    Type: Application
    Filed: February 22, 2018
    Publication date: December 12, 2019
    Inventors: Albert SCHNATTERER, Jan VERMEHREN, Edith BECKMANN, Claus-Christian HAESELHOFF, Tim HAMMERER, Stefan GRASSER
  • Process for the preparation of polyether carbonate polyols
    Patent number: 9382417
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols by catalytic copolymerization of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances with the aid of double metal cyanide (DMC) catalysts and in the presence of additives A) chosen from the group consisting of sterically non-hindered phenols, catechols, pyrocatechols, thiazines, phenothiazines, thiazoles, benzothiazoles, oxazines, phenoxazines, 2,2,6,6-tetramethylpiperidine 1-oxyl and nitrostyrenes and optionally in the presence of metal salts B).
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: July 5, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Christoph Gürtler, Jörg Hofmann, Thomas Ernst Müller, Aurel Wolf, Stefan Grasser, Burkhard Köhler
  • METHOD FOR PRODUCING AN EFFICIENT CATALYST FOR GENERATING MULTI-WALLED CARBON NANOTUBES, MULTI-WALLED CARBON NANOTUBES AND CARBON NANOTUBE
    Publication number: 20160160394
    Abstract: The invention relates to a method for producing a catalyst for the synthesis of multi-walled carbon nanotubes. The invention also relates to a method for producing multi-walled carbon nanotubes and a carbon nanotube powder with improved properties and comprising said carbon nanotubes.
    Type: Application
    Filed: July 14, 2014
    Publication date: June 9, 2016
    Inventors: Heiko HOCKE, Stefan GRASSER, Oliver Felix Karl SCHLÜTER
  • Process for the production of polyether carbonate polyols
    Patent number: 9315622
    Abstract: The present invention relates to a method for producing polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide, in the presence of at least one double metal cyanide (DMC) catalyst, wherein the double metal cyanide catalyst comprises a complex-forming component selected from the group consisting of polycarbonate diol, polyether carbonate polyol, polyethylene glycol diol and poly(tetramethylene ether diol).
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: April 19, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Jörg Hofmann, Christoph Gürtler, Stefan Grasser, Aurel Wolf
  • Method for producing polyetherester carbonate polyols
    Patent number: 9296859
    Abstract: The present invention relates to a method for producing polyetherester carbonate polyols by means of catalytic addition of carbon dioxide, alkylene oxides and cyclic anhydrides to H-functional starter compounds in the presence of double metal cyanide (DMC) catalysts.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 29, 2016
    Assignee: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Christoph Guertler, Thoams Ernst Mueller, Anthony Kermagoret, Yvonne Dienes, Julien Barruet, Aurel Wolf, Stefan Grasser
  • Process for preparing polyether carbonate polyols with double metal cyanide catalysts and in the presence of metal salts
    Patent number: 9080010
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols by catalytic copolymerization of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances with the aid of double metal cyanide (DMC) catalysts and in the presence of metal salts.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: July 14, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Aurel Wolf, Stefan Grasser, Christoph Gürtler, Jörg Hofmann
  • Process for the production of polyether carbonate polyols
    Patent number: 9062156
    Abstract: The present invention relates to a process for the production of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides (epoxides) and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the production of the polyether carbonate polyols is carried out in a tubular reactor.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: June 23, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Stefan Grasser, Aurel Wolf
  • Process for the preparation of polyether carbonate polyols
    Patent number: 9045592
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols from one or more alkylene oxides, carbon dioxide and optionally from one or more H-functional starter substances in the presence of at least one double metal cyanide catalyst, wherein the double metal cyanide catalyst comprises an unsaturated alcohol as a complexing ligand.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: June 2, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Jörg Hofmann, Aurel Wolf, Stefan Grasser
  • Method for producing polyether carbonate polyols
    Patent number: 8946466
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the cyanide-free metal salt, the metal cyanide salt or both the mentioned salts used for the preparation of the double metal cyanide catalyst contain(s) from 0.3 to 1.8 mol base equivalents (based on 1 mol of the metal cyanide salt used for the synthesis of the catalyst) of alkaline metal hydroxide, metal carbonate and/or metal oxide.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: February 3, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Jörg Hofmann, Aurel Wolf, Stefan Grasser
  • Process for the activation of double metal cyanide catalysts for the preparation of polyether carbonate polyols
    Patent number: 8933192
    Abstract: The present invention relates to a process for the activation of double metal cyanide (DMC) catalysts for the preparation of polyether carbonate polyols by catalytic copolymerisation of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: January 13, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Stefan Grasser, Jörg Hofmann, Aurel Wolf
  • METHOD FOR PRODUCING POLYETHERESTER CARBONATE POLYOLS
    Publication number: 20140329987
    Abstract: The present invention relates to a method for producing polyetherester carbonate polyols by means of catalytic addition of carbon dioxide, alkylene oxides and cyclic anhydrides to H-functional starter compounds in the presence of double metal cyanide (DMC) catalysts.
    Type: Application
    Filed: December 10, 2012
    Publication date: November 6, 2014
    Inventors: Christoph Gürtler, Thomas Ernst Müller, Anthony Kermagoret, Yvonne Dienes, Julien Barruet, Aurel Wolf, Stefan Grasser
  • PROCESS FOR THE PRODUCTION OF POLYETHER CARBONATE POLYOLS
    Publication number: 20140256908
    Abstract: The present invention relates to a method for producing polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide, in the presence of at least one double metal cyanide (DMC) catalyst, wherein the double metal cyanide catalyst comprises a complex-forming component selected from the group consisting of polycarbonate diol, polyether carbonate polyol, polyethylene glycol diol and poly(tetramethylene ether diol).
    Type: Application
    Filed: July 16, 2012
    Publication date: September 11, 2014
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Jörg Hofmann, Christoph Gürtler, Stefan Grasser, Aurel Wolf
  • PROCESS FOR THE PRODUCTION OF POLYETHER CARBONATE POLYOLS
    Publication number: 20130211042
    Abstract: The present invention relates to a process for the production of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides (epoxides) and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the production of the polyether carbonate polyols is carried out in a tubular reactor.
    Type: Application
    Filed: October 11, 2011
    Publication date: August 15, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Stefan Grasser, Aurel Wolf
  • PROCESS FOR PREPARING POLYETHER CARBONATE POLYOLS WITH DOUBLE METAL CYANIDE CATALYSTS AND IN THE PRESENCE OF METAL SALTS
    Publication number: 20130190462
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols by catalytic copolymerisation of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances with the aid of double metal cyanide (DMC) catalysts and in the presence of metal salts.
    Type: Application
    Filed: February 17, 2011
    Publication date: July 25, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Aurel Wolf, Stefan Grasser, Christoph Gürtler, Jörg Hofmann
  • PROCESS FOR THE PREPARATION OF POLYETHER CARBONATE POLYOLS
    Publication number: 20130184432
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols from one or more alkylene oxides, carbon dioxide and optionally from one or more H-functional starter substances in the presence of at least one double metal cyanide catalyst, wherein the double metal cyanide catalyst comprises an unsaturated alcohol as a complexing ligand.
    Type: Application
    Filed: September 6, 2011
    Publication date: July 18, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Jörg Hofmann, Aurel Wolf, Stefan Grasser
  • METHOD FOR PRODUCING POLYETHER CARBONATE POLYOLS
    Publication number: 20130123532
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the cyanide-free metal salt, the metal cyanide salt or both the mentioned salts used for the preparation of the double metal cyanide catalyst contain(s) from 0.3 to 1.8 mol base equivalents (based on 1 mol of the metal cyanide salt used for the synthesis of the catalyst) of alkaline metal hydroxide, metal carbonate and/or metal oxide.
    Type: Application
    Filed: May 13, 2011
    Publication date: May 16, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Jörg Hofmann, Aurel Wolf, Stefan Grasser
  • PROCESS FOR THE PREPARATION OF POLYETHER CARBONATE POLYOLS
    Publication number: 20130072602
    Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols by catalytic copolymerization of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances with the aid of double metal cyanide (DMC) catalysts and in the presence of additives A) chosen from the group consisting of sterically non-hindered phenols, catechols, pyrocatechols, thiazines, phenothiazines, thiazoles, benzothiazoles, oxazines, phenoxazines, 2,2,6,6-tetramethylpiperidine 1-oxyl and nitrostyrenes and optionally in the presence of metal salts B).
    Type: Application
    Filed: March 24, 2011
    Publication date: March 21, 2013
    Applicant: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Christoph Gürtler, Jörg Hofmann, Thomas Ernst Müller, Aurel Wolf, Stefan Grasser, Burkhard Köhler
  • PROCESS FOR THE ACTIVATION OF DOUBLE METAL CYANIDE CATALYSTS FOR THE PREPARATION OF POLYETHER CARBONATE POLYOLS
    Publication number: 20120289732
    Abstract: The present invention relates to a process for the activation of double metal cyanide (DMC) catalysts for the preparation of polyether carbonate polyols by catalytic copolymerisation of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances.
    Type: Application
    Filed: January 18, 2011
    Publication date: November 15, 2012
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Christoph Gürtler, Stefan Grasser, Jörg Hofmann, Aurel Wolf
  • METHOD FOR PRODUCING FATTY ACID ALKYL ESTERS
    Publication number: 20100298586
    Abstract: Multistage process for the preparation of fatty acid alkyl esters.
    Type: Application
    Filed: December 16, 2008
    Publication date: November 25, 2010
    Applicant: BAYER TECHNOLOGY SERVICES GMBH
    Inventors: Wulf Dietrich, Stefan Grasser, Dieter Heinz, Jürgen Karthaus, Leslaw Mleczko, Heinrich Morhenn, Rafael Watsitz, Ren Wu