Patents by Inventor Berndt Maiwald

Berndt Maiwald 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 preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis-alkoxy-substituted spirocyclic 1H-pyrrolidine-2,4-dione derivatives
    Patent number: 9840459
    Abstract: The present invention relates to a novel process for preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis-alkoxy-substituted spirocyclic 1H-pyrrolidine-2,4-dione derivatives, and also to novel intermediates and starting materials which are produced and/or used in the process according to the invention.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: December 12, 2017
    Assignee: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Taraneh Farida, Berndt Maiwald, Martin Littmann, Winfried Etzel, Rafael Warsitz, Nicolas Henck, Michael Esser
  • PROCESS FOR PREPARING CIS-ALKOXY-SUBSTITUTED SPIROCYCLIC PHENYLACETYLAMINO ACID ESTERS AND CIS- ALKOXY-SUBSTITUTED SPIROCYCLIC 1H- PYRROLIDINE-2,4-DIONE DERIVATIVES
    Publication number: 20160264516
    Abstract: The present invention relates to a novel process for preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis-alkoxy-substituted spirocyclic 1H-pyrrolidine-2,4-dione derivatives, and also to novel intermediates and starting materials which are produced and/or used in the process according to the invention.
    Type: Application
    Filed: May 23, 2016
    Publication date: September 15, 2016
    Inventors: Taraneh FARIDA, Berndt MAIWALD, Martin LITTMANN, Winfried ETZEL, Rafael WARSITZ, Nicolas HENCK, Michael ESSER
  • Process for preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis- alkoxy-substituted spirocyclic 1H- pyrrolidine-2,4-dione derivatives
    Patent number: 9376374
    Abstract: The present invention relates to a novel process for preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis-alkoxy-substituted spirocyclic 1H-pyrrolidine-2,4-dione derivatives, and also to novel intermediates and starting materials which are produced and/or used in the process according to the invention.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: June 28, 2016
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Taraneh Farida, Berndt Maiwald, Martin Littmann, Winfried Etzel, Rafael Warsitz, Nicolas Henck, Michael Esser
  • Process for preparing sodium salts or potassium salts of 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylate
    Patent number: 9056848
    Abstract: Process for preparing sodium or potassium salts of 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters, comprising the reaction of a malonic ester with potassium hydroxide to give the corresponding malonic ester potassium salt of the formula (III) which is then reacted further with a chloroacetic ester to give a compound of the formula (V) followed by a ring closure reaction in which the compound of the formula (V) is reacted with a sodium or potassium alkoxide of the formula ZOR1 where R1, R2, R3 and K are each as defined in the description.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: June 16, 2015
    Assignee: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Christian Funke, Taraneh Farida, Stefan Beeck, Norbert Lui, Berndt Maiwald
  • PROCESS FOR PREPARING CIS-ALKOXY-SUBSTITUTED SPIROCYCLIC PHENYLACETYLAMINO ACID ESTERS AND CIS- ALKOXY-SUBSTITUTED SPIROCYCLIC 1H- PYRROLIDINE-2,4-DIONE DERIVATIVES
    Publication number: 20150051407
    Abstract: The present invention relates to a novel process for preparing cis-alkoxy-substituted spirocyclic phenylacetylamino acid esters and cis-alkoxy-substituted spirocyclic 1H-pyrrolidine-2,4-dione derivatives, and also to novel intermediates and starting materials which are produced and/or used in the process according to the invention.
    Type: Application
    Filed: March 25, 2013
    Publication date: February 19, 2015
    Applicant: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Taraneh Farida, Berndt Maiwald, Martin Littmann, Winfried Etzel
  • PROCESS FOR PREPARING SODIUM SALTS OR POTASSIUM SALTS OF 4-HYDROXY-2-OXO-2,5-DIHYDROFURAN-3-CARBOXYLATE
    Publication number: 20140148604
    Abstract: Process for preparing sodium or potassium salts of 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters, comprising the reaction of a malonic ester with potassium hydroxide to give the corresponding malonic ester potassium salt of the formula (III) which is then reacted further with a chloroacetic ester to give a compound of the formula (V) followed by a ring closure reaction in which the compound of the formula (V) is reacted with a sodium or potassium alkoxide of the formula ZOR1 where R1, R2, R3 and K are each as defined in the description.
    Type: Application
    Filed: February 29, 2012
    Publication date: May 29, 2014
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Christian Funke, Taraneh Farida, Stefan Beeck, Norbert Lui, Berndt Maiwald