Patents by Inventor Eckhard Stroefer

Eckhard Stroefer 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).

  • Production of isocyanates in the gaseous phase
    Publication number: 20050070734
    Abstract: The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.
    Type: Application
    Filed: November 19, 2002
    Publication date: March 31, 2005
    Applicant: BASF Aktiengesellschaft
    Inventors: Andreas Wölfert, Christian Muller, Eckhard Stroefer, Joachim Pfeffinger, Markus Weber, Carsten Knosche
  • Method for producing isocynates
    Patent number: 6833469
    Abstract: The invention relates to a process for the production of isocyanates by reaction of primary amines with phosgene, in which isocyanate is used as solvent, wherein some or all of isocyanate used as solvent is added to the reaction mixture only after the amine and phosgene have been physically combined.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: December 21, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Wölfert, Christian Müller, Eckhard Stroefer
  • Method for producing isocynates
    Publication number: 20040192959
    Abstract: The invention relates to a process for the production of isocyanates by reaction of primary amines with phosgene, in which isocyanate is used as solvent, wherein some or all of isocyanate used as solvent is added to the reaction mixture only after the amine and phosgene have been physically combined.
    Type: Application
    Filed: December 10, 2003
    Publication date: September 30, 2004
    Inventors: Andreas Woelfert, Christian Muller, Eckhard Stroefer
  • Preparation of 1-pyrazolines
    Patent number: 4788293
    Abstract: 1-Pyrazolines are prepared by oxidation of a 1,3-diamine with sodium hypochlorite and a peroxide in aqueous solution.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: November 29, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Stroefer, Wolfgang Rohr, Gerhard W. Rotermund, Rolf Fischer, Reinhard Neudert
  • Preparation of pyrazoles
    Patent number: 4702803
    Abstract: Pyrazoles of the general formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, alkyl, cycloalkyl or aryl, are prepared by electrochemical oxidation of 2-pyrazolines of the general formula ##STR2## in the presence of an ionic halide.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: October 27, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Steiniger, Eckhard Stroefer