Patents by Inventor Wilhelm Pohlmeyer

Wilhelm Pohlmeyer 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 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 2,2,2-trifluoroethanol
    Patent number: 4694112
    Abstract: A catalytic process for producing 2,2,2-trifluoroethanol by gas phase hydrogenation of 2,2,2-trifluoroethyl trifluoroacetate using oxide catalysts formed of copper and zinc and containing 0 to 10 percent chromium oxide.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: September 15, 1987
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Heinrich Willenberg, Wilhelm Pohlmeyer, Werner Rudolph