Patents by Inventor Johann Buchler

Johann Buchler 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).

  • Rhenium-oxo-porphyrin complexes
    Patent number: 4987226
    Abstract: Rhenium-oxo complexes withoctaethyl porphyrin or5,10,15,20-tetraphenyl porphyrins or5,10,15,20-tetra(4-pyridyl)-porphyrins as ligandswhich optionally carry an anion on the central atom. Methods of preparing the complexes are also disclosed.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: January 22, 1991
    Assignee: Degussa Aktiengesellschaft
    Inventors: Johann Buchler, Steffen Kruppa, Manfred Schmidt, Guenter Prescher
  • Method for the catalytic epoxidation of olefins with hydrogen peroxide
    Patent number: 4973718
    Abstract: A method for the catalytic epoxidation of olefins with hydrogen peroxide in the presence of rhenium-oxo-complexes or of a binuclear compound of the type .mu.-oxobis [porphyrinato-oxo-rhenium(V)] with octaethyl porphyrin or 5,10,15,20-tetraphenyl porphyrin or 5,10,15,20-tetra(4-pyridyl)-porphyrin as ligands.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: November 27, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Johann Buchler, Manfred Schmidt, Guenter Prescher
  • Method for the catalytic epoxidation of olefins with hydrogen peroxide
    Patent number: 4845252
    Abstract: A method for the catalytic epoxidation of olefines with hydrogen peroxide in the presence of tungsten oxo complexes or of a binuclear compound of the type .mu.-oxobis [porphyrinato-oxo tungsten (V)] or cis-oxo peroxo tungsten (VI) prophyrin or cis-dioxo porphyrinatotungsten (VI) with octaethyl porphyrin or 5,10,15,20-tetraphenyl porphyrin or 5,10,15,20-tetra(4-pyridyl)-porphyrin as ligands.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: July 4, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Manfred Schmidt, Guenter Prescher, Johann Buchler, Axel Kleemann