Patents by Inventor Lieselotte Bauer

Lieselotte Bauer 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 of producing crystalline nitrilo tris-(methylene phosphonic acid)
    Patent number: 4009204
    Abstract: Pure, crystalline nitrilo tris-(methylene phosphonic acid) is produced in a high yield by reacting lower aliphatic acid amides with formaldehyde and phosphorus trihalogenide, preferably phosphorus trichloride.
    Type: Grant
    Filed: March 18, 1971
    Date of Patent: February 22, 1977
    Assignee: Joh. A. Benckiser GmbH
    Inventors: Friedrich Krueger, Lieselotte Bauer
  • Process of producing amino methylene phosphonic acids
    Patent number: 3959361
    Abstract: Substantially pure amino methylene phosphonic acids, such as ethylene diamine tetra-(methylene phosphonic acid), nitrilo tris-(methylene phosphonic acid), and others are obtained in a high yield by reacting .alpha.-amino mono- or polycarboxylic acids which are substituted at their amino nitrogen atom, or their alkali metal salts with phosphorous acid and/or a phosphorus trihalogenide, preferably phosphorus trichloride in the presence or absence of an inert diluent.
    Type: Grant
    Filed: December 11, 1973
    Date of Patent: May 25, 1976
    Assignee: Joh. A. Benckiser GmbH
    Inventors: Friedrich Krueger, Lieselotte Bauer, Walter Michel