Patents by Inventor Herbert Schneidewind

Herbert Schneidewind 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).

  • Method of preparing alkoxymethylene compounds
    Patent number: 4468353
    Abstract: An improvement in the alkoxylation of a compound having a reactive methylene group by contacting said compound with an orthoformic acid trialkyl ester in the presence of a catalyst, the improvement residing in employing at least 1.6 moles of orthoformic acid ester per mole of compound having a reactive methylene group and carrying out the process in the presence of a catalyst of the group of aliphatic carboxylic acids, anhydrides of aliphatic carboxylic acids, aromatic sulphonic acids, alkali metal alcoholates and alkanolamines.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: August 28, 1984
    Assignee: Dynamit Nobel AG
    Inventors: Otto Ackermann, Dieter Bretzinger, Herbert Schneidewind, Rudolf Stephan
  • Method of preparing alkoxymethylene compounds
    Patent number: 4277418
    Abstract: An improvement in the alkoxylation of a compound having a reactive methylene group by contacting said compound with an orthoformic acid trialkyl ester in the presence of a catalyst, the improvement residing in employing at least 1.6 moles of orthoformic acid ester per mole of compound having a reactive methylene group and carrying out the process in the presence of a catalyst of the group of aliphatic carboxylic acids, anhydrides of aliphatic carboxylic acids, aromatic sulphonic acids, alkali metal alcoholates and alkanolamines.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: July 7, 1981
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Otto Ackermann, Dieter Bretzinger, Herbert Schneidewind, Rudolf Stephan