Patents by Inventor Andreas Gieseler

Andreas Gieseler 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 phthalides
    Patent number: 6028204
    Abstract: The disclosure is a process for preparing a phthalide of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently of the others hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, by catalytic hydrogenation of a phthalic anhydride of the general formula II ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, in a solvent, which comprises using said phthalide I, the reaction product of the catalytic hydrogenation, as solvent.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: February 22, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Klemens Massonne, Rainer Becker, Wolfgang Reif, Horst Neuhauser, Andreas Gieseler, Klaus Mundinger
  • Electrode consisting of an iron-containing core and a lead-containing coating
    Patent number: 5593557
    Abstract: An electrode consisting of an electrically conductive core essentially comprising iron and an electrically conductive coating essentially comprising lead, a process for the production of the novel electrode, its use for the reductive coupling of olefinic reactants and an improved process for the reductive coupling of olefinic reactants.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: January 14, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: David Sopher, Andreas Gieseler, Hartmut Hibst, Klaus Harth, Peter Jaeger