Patents by Inventor Jan Arie Niessen

Jan Arie Niessen 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).

  • Quantification method of impurities in lactide
    Patent number: 10627347
    Abstract: A method for quantification of the amount of impurities in lactide. The method is characterized in that the quantification of the impurities is based on measurements performed on absorptions in the near Infra-Red region of the electromagnetic spectrum. With this method, small amounts of impurities like water, free-acid species or both can be determined online in a reaction mixture of lactide in a relatively simple manner. This allows a simple online monitoring of the production process of lactide.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: April 21, 2020
    Assignee: PURAC BIOCHEM BV
    Inventors: Gerrit Gobius Du Sart, Jan Arie Niessen, Vincent De Jong
  • Quantification of lactide amounts in a polymeric matrix
    Patent number: 10578549
    Abstract: The present invention relates to a method for quantification of the amount of lactide in a lactide-based polymeric matrix by means of Infra Red Spectroscopy measurement. According to the invention the quantification is based on measurements performed on absorptions in the near Infra Red region of the electromagnetic spectrum. The invented method allows a rapid, easy and cheap quantification of lactide in a polymeric matrix, especially in PLA.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: March 3, 2020
    Assignee: PURAC BIOCHEM B.V.
    Inventors: Gerrit Gobius Du Sart, Vincent De Jong, Jan Arie Niessen
  • QUANTIFICATION METHOD OF IMPURITIES IN LACTIDE
    Publication number: 20160299071
    Abstract: A method for quantification of the amount of impurities in lactide. The method is characterized in that the quantification of the impurities is based on measurements performed on absorptions in the near Infra-Red region of the electromagnetic spectrum. With this method, small amounts of impurities like water, free-acid species or both can be determined online in a reaction mixture of lactide in a relatively simple manner. This allows a simple online monitoring of the production process of lactide.
    Type: Application
    Filed: December 8, 2014
    Publication date: October 13, 2016
    Applicant: PURAC Biochem BV
    Inventors: Gerrit GOBIUS DU SART, Jan Arie NIESSEN, Vincent DE JONG
  • QUANTIFICATION OF LACTIDE AMOUNTS IN A POLYMERIC MATRIX
    Publication number: 20150168295
    Abstract: The present invention relates to a method for quantification of the amount of lactide in a lactide-based polymeric matrix by means of Infra Red Spectroscopy measurement. According to the invention the quantification is based on measurements performed on absorptions in the near Infra Red region of the electromagnetic spectrum. The invented method allows a rapid, easy and cheap quantification of lactide in a polymeric matrix, especially in PLA.
    Type: Application
    Filed: June 7, 2013
    Publication date: June 18, 2015
    Applicant: PURAC BIOCHEM BV
    Inventors: Gerrit Gobius Du Sart, Vincent De Jong, Jan Arie Niessen