Patents by Inventor Ton R. Vries

Ton R. Vries 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 separation of a mixture of enantiomers
    Patent number: 6465684
    Abstract: A diastereomer complex obtained via a process for the separation of enantiomers is disclosed, wherein separation can be rapidly effected such that enantiomers are obtained with high e.e. values. The process permits the separation of mixtures of enantiomers in which more than one resolving agent is used, of which at least one resolving agent is optically active, and which yields a diastereomer complex containing at least two resolving agents in optically active form. The process provides for, inter alia, a diastereomer complex having at least three compounds of which at least two compounds are resolving agents in optically active form, and at least one compound is an enantiomer in optically active form. Also provided is a diastereomer complex having at least three compounds of which at least one compound is a resolving agent in optically active form, and at least two compounds which are enantiomers in optically active form.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: October 15, 2002
    Assignee: DSM N.V.
    Inventors: Ton R. Vries, Hans Wijnberg, Erik Van Echten, Lumbertus A. Hulshof, Quirinus B. Broxterman
  • Process for the separation of a mixture of enantiomers
    Publication number: 20010051747
    Abstract: A diastereomer complex obtained via a process for the separation of enantiomers is disclosed, wherein separation can be rapidly effected such that enantiomers are obtained with high e.e. values. The process permits the separation of mixtures of enantiomers in which more than one resolving agent is used, of which at least one resolving agent is optically active, and which yields a diastereomer complex containing at least two resolving agents in optically active form. The process provides for, inter alia, a diastereomer complex having at least three compounds of which at least two compounds are resolving agents in optically active form, and at least one compound is an enantiomer in optically active form. Also provided is a diastereomer complex having at least three compounds of which at least one compound is a resolving agent in optically active form, and at least two compounds which are enantiomers in optically active form.
    Type: Application
    Filed: February 16, 2001
    Publication date: December 13, 2001
    Applicant: DSM N.V.
    Inventors: Ton R. Vries, Hans Wijnberg, Erik Van Echten, Lumbertus A. Hulshof, Quirinus B. Broxterman
  • Process for the separation of a mixture of enantiomers
    Patent number: 6235927
    Abstract: A diastereomer complex obtained via a process for the separation of enantiomers is disclosed, wherein separation can be rapidly effected such that enantiomers are obtained with high e.e. values. The process pets the separation of mixtures of enantiomers in which more than one resolving agent is used, of which at least one resolving agent is optically active, and which yields a diastereomer complex containing at least two resolving agents in optically active form. The process provides for, inter alia, a diastereomer complex having at least three compounds of which at least two compounds are resolving agents in optically active form, and at least one compound is an onantiomer in optically active form. Also provided is a diastereomer complex having at least three compounds of which at lea one compound is a resolving agent in optically active form, and at least two compounds which are enantiomers in optically active form.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: May 22, 2001
    Assignee: DSM N.V.
    Inventors: Ton R. Vries, Hans Wijnberg, Erik Van Echten, Lumbertus A. Hulshof, Quirinus B. Broxterman
  • Method of manufacturing conductive heterocyclic polymers by reacting new polymeric intermediate products with NH.sub.3, a NH.sub.3 producing substance, P.sub.2 S.sub.5 or Lawesson's reagent
    Patent number: 5232630
    Abstract: The polymers are prepared by using the new intermediate product which forms a polymeric precursor, and which is converted into the desired heterocyclic polymer by ring closure.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 3, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Kornelis L. Pouwer, Ton R. Vries, Egbert W. Meijer, Edsko E. Havinga, Hans Wijnberg