Patents by Inventor Gotz Wilbert

Gotz Wilbert 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).

  • Color-stable solution of dimethylaminoacetonitrile in water and process for preparing it
    Patent number: 6504043
    Abstract: The present invention relates to a process for preparing a colour-stable, aqueous dimethylaminoacetonitrile solution from a formaldehyde source, dimethylamine and hydrocyanic acid, wherein the reaction mixture contains 2,4-diamino-6-phenyl-1,3,5-triazine(benzoguanamine) in a concentration of from 0.001 to 5% by weight, based on formaldehyde, prior to the reaction and the starting substances are used stoichiometrically or in a ratio of 0.98-1.02 mol of formaldehyde and 0.95-1.10 mol of dimethylamine per mol of hydrocyanic acid. The resulting product remains colour-stable without a further purification step even after prolonged storage.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: January 7, 2003
    Assignee: Clariant GmbH
    Inventors: Rainer Fell, Götz Wilbert, Thomas Stährfeldt
  • Colour-stable solution of dimethylaminoacetonitrile in water and process for preparing it
    Publication number: 20020058830
    Abstract: The present invention relates to a process for preparing a colour-stable, aqueous dimethylaminoacetonitrile solution from a formaldehyde source, dimethylamine and hydrocyanic acid, wherein the reaction mixture contains 2,4-diamino-6-phenyl-1,3,5-triazine (benzoguanamine) in a concentration of from 0.001 to 5% by weight, based on formaldehyde, prior to the reaction and the starting substances are used stoichiometrically or in a ratio of 0.98-1.02 mol of formaldehyde and 0.95-1.10 mol of dimethylamine per mol of hydrocyanic acid. The resulting product remains colour-stable without a further purification step even after prolonged storage.
    Type: Application
    Filed: March 5, 2001
    Publication date: May 16, 2002
    Applicant: Clariant GmbH
    Inventors: Rainer Fell, Gotz Wilbert, Thomas Stahrfeldt
  • Process for preparing an enzyme extract
    Publication number: 20020052039
    Abstract: The present invention relates to a process for preparing an (R)-hydroxynitrile lyase extract by extracting an (R)-hydroxynitrile lyase-containing natural product with water in the absence or presence of a buffer at a pH of 3.3 to 5.5.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 2, 2002
    Applicant: Clariant GmbH
    Inventors: Bettina Kirschbaum, Gotz Wilbert, Franz Effenberger
  • Process for preparing optically active cyanohydrins and secondary products
    Publication number: 20020052523
    Abstract: The present invention relates to a process for preparing optically active cyanohydrins of the formula (II), 1
    Type: Application
    Filed: November 1, 2001
    Publication date: May 2, 2002
    Applicant: Clariant GmbH
    Inventors: Bettina Kirschbaum, Gotz Wilbert, Franz Effenberger