Patents by Inventor Ekkehard Winterfeldt

Ekkehard Winterfeldt 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 (3E, 7E)-homofarnesol
    Patent number: 9758500
    Abstract: The present invention relates to new types of processes for the improved preparation of homofarnesol, in particular of (3E,7E)-homofarnesol and homofarnesol preparations with an increased content of (3E,7E)-homofarnesol (also referred to as all E-homofarnesol).
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: September 12, 2017
    Assignee: BASF SE
    Inventors: Melanie Weingarten, Hansgeorg Ernst, Wolfgang Siegel, Ekkehard Winterfeldt, Reinhard W. Hoffmann
  • PROCESS FOR THE PREPARATION OF (3E, 7E)-HOMOFARNESOL
    Publication number: 20170029396
    Abstract: The present invention relates to new types of processes for the improved preparation of homofarnesol, in particular of (3E,7E)-homofarnesol and homofarnesol preparations with an increased content of (3E,7E)-homofarnesol (also referred to as all E-homofarnesol).
    Type: Application
    Filed: October 12, 2016
    Publication date: February 2, 2017
    Inventors: Melanie WEINGARTEN, Hansgeorg ERNST, Wolfgang SIEGEL, Ekkehard Winterfeldt, Reinhard HOFFMAN
  • Process for the preparation of (3E, 7E)-homofarnesol
    Patent number: 9493385
    Abstract: The present invention relates to new types of processes for the improved preparation of homofarnesol, in particular of (3E,7E)-homofarnesol and homofarnesol preparations with an increased content of (3E,7E)-homofarnesol (also referred to as all E-homofarnesol).
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: November 15, 2016
    Assignee: BASF SE
    Inventors: Melanie Weingarten, Hansgeorg Ernst, Wolfgang Siegel, Ekkehard Winterfeldt, Reinhard W. Hoffmann
  • PROCESS FOR THE PREPARATION OF (3E, 7E)-HOMOFARNESOL
    Publication number: 20160200648
    Abstract: The present invention relates to new types of processes for the improved preparation of homofarnesol, in particular of (3E,7E)-homofarnesol and homofarnesol preparations with an increased content of (3E,7E)-homofarnesol (also referred to as all E-homofarnesol).
    Type: Application
    Filed: July 21, 2015
    Publication date: July 14, 2016
    Inventors: Melanie Bonnekessel-Weingarten, Hansgeorg Ernst, Wolfgang Siegel, Ekkehard Winterfeldt, Reinhard W. Hoffmann
  • Process for the Preparation of (3E, 7E)-Homofarnesol
    Publication number: 20130273619
    Abstract: The present invention relates to new types of processes for the improved preparation of homofarnesol, in particular of (3E,7E)-homofarnesol and homofarnesol preparations with an increased content of (3E,7E)-homofarnesol (also referred to as all E-homofarnesol).
    Type: Application
    Filed: April 16, 2013
    Publication date: October 17, 2013
    Applicant: BASF SE
    Inventors: Melanie Bonnekessel, Hansgeorg Ernst, Wolfgang Siegel, Ekkehard Winterfeldt, Reinhard W. Hoffmann
  • Cephalostatin analogues
    Patent number: 5708164
    Abstract: Synthetically produced cephalostatin analogues of the formula I described in the disclosure, synthetic methods for preparing the cephalostatin analogues, pharmaceutical compositions containing the analogues and methods for using the analogues as active agent in pharmaceutical uses, particularly due to their cytotoxic activity.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: January 13, 1998
    Assignee: Schering Aktiengesellschaft
    Inventors: Ekkehard Winterfeldt, Andreas Kramer, Ulrike Ullmann, Henry Laurent
  • Process for the production of 3-deoxy-4-ene steroids
    Patent number: 5140106
    Abstract: A process for the production of 3-deoxy-4-ene steroids of the general formula I ##STR1## is described, in which R.sub.1, R.sub.2 and R.sub.3 mean a hydrogen atom or a methyl group,R.sub.4 represents a lower alkyl group, a phenyl group or a free, esterified or etherified hydroxy group,R.sub.5 symbolizes a hydrogen atom, a vinyl group or the grouping --C.tbd.CR.sub.6 with R.sub.6 meaning a hydrogen atom, an alkyl group with a maximum of 4 carbon atoms or a halogen atom,X represents a methylene group, a fluoromethylene group, an ethylidene group or a vinylidene group,Y and U represent a methylene group or an ethylidene group andZ symbolizes a methylene group, an ethylidene group, a vinylidene group, a chloromethylene group or a hydroxymethylene group and in which the bonds represent three single bonds or one double bond and two single bonds or a conjugated double bond.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: August 18, 1992
    Assignee: Schering Aktiengesellschaft
    Inventors: Ekkehard Winterfeldt, Ulf Tilstamm, Helmut Hofmeister, Henry Laurent