Patents by Inventor Heinz-Rudi Feist

Heinz-Rudi Feist 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 halogenated carboxylic anhydrides
    Patent number: 11414369
    Abstract: The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: August 16, 2022
    Assignee: Solvay SA
    Inventors: Heinz Rudi Feist, Werner Rudolph
  • PROCESS FOR THE PREPARATION OF HALOGENATED CARBOXYLIC ANHYDRIDES
    Publication number: 20210139403
    Abstract: The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.
    Type: Application
    Filed: January 21, 2021
    Publication date: May 13, 2021
    Inventors: Heinz Rudi FEIST, Werner RUDOLPH
  • Process for the preparation of halogenated carboxylic anhydrides
    Patent number: 10927063
    Abstract: The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: February 23, 2021
    Assignee: SOLVAY SA
    Inventors: Heinz Rudi Feist, Werner Rudolph
  • PROCESS FOR THE PREPARATION OF HALOGENATED CARBOXYLIC ANHYDRIDES
    Publication number: 20160122273
    Abstract: The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.
    Type: Application
    Filed: August 5, 2014
    Publication date: May 5, 2016
    Inventors: Heinz Rudi FEIST, Werner RUDOLPH
  • Process for producing carboxylic acid esters from carboxylic acid halides and alcohols
    Patent number: 5405991
    Abstract: A process for preparing carboxylic esters from carboxylic acid halides or carboxylic anhydrides by reacting one of these starting materials with an alcohol under the catalytic action of "onium" or metal salts of carboxylic acids to obtain high yields of products in anhydrous form in a technically simple manner. The process is especially well suited for preparing 1,1,1-trifluoroethyl trifluoroacetate.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: April 11, 1995
    Inventors: Heinz-Rudi Feist, Wilhelm Pohlmeyer, Joachim Frehse, Werner Rudolph, Max Braun, Kerstin Eichholz
  • Process for producing novel products by hydrogen fluoride with esters of fatty acids
    Patent number: 4746463
    Abstract: A process is disclosed for reacting hydrogen fluoride with a fatty acid ester having a melting point less than than 60.degree. C. The resulting products and various applications for them as lubricants, lubricant additives and pharmaceutical carriers are also described.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: May 24, 1988
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Heinz-Rudi Feist, Hans Buchwald, Boleslaus Raschkowski, Werner Rudolph
  • Process for producing novel products by hydrogen fluoride with esters of fatty acids
    Patent number: 4659493
    Abstract: A process is disclosed for reacting hydrogen fluoride with a fatty acid ester having a melting point less than than 60.degree. C. The resulting products and various applications for them as lubricants, lubricant additives and pharmaceutical carriers are also described.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: April 21, 1987
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Heinz-Rudi Feist, Hans Buchwald, Boleslaus Raschkowski, Werner Rudolph