Patents by Inventor Juergen DEMETER

Juergen DEMETER 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 FOR THE DEACTIVATION OF AN ACID CATALYST DURING THE PRODUCTION PROCESS OF A POLYOXYMETHYLENE COPOLYMER
    Publication number: 20260209432
    Abstract: The present invention relates to a method for the deactivation of an acid catalyst during the production process of a polyoxymethylene copolymer (cPOM) by adding (A) triisopropanolamine (tris(2-hydroxypropyl)amine) and/or (B) sodium carbonate and/or sodium hydrogen carbonate, preferably by adding (A) triisopropanolamine (tris(2-hydroxypropyl)amine) and (B) sodium carbonate and/or sodium hydrogen carbonate, to a mixture (M1) which comprises the polyoxymethylene copolymer (cPOM) and the acid catalyst.
    Type: Application
    Filed: December 13, 2023
    Publication date: July 23, 2026
    Inventors: Thomas HEITZ, Juergen DEMETER, Konrad KNOLL, Jutta Karin LANGLOTZ, Erika Sibylle Julaine VON BOMHARD, Jin-Sang CHOI, JongMoon KIM
  • METHOD FOR THE PRODUCTION OF STABLE POLYOXYMETHYLENE COPOLYMERS (CPOM)
    Publication number: 20210292461
    Abstract: The present invention relates to a method for the deactivation of an acid catalyst during the production process of a polyoxymethylene copolymer (cPOM) by adding triisopropanolamine (tris(2-hydroxypropyl)amine) to a mixture which comprises the polyoxymethylene copolymer (cPOM) and the acid catalyst.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 23, 2021
    Inventors: Thomas HEITZ, Juergen DEMETER, Anna Karina MOELLER, Cho IN-GI
  • Process for preparing polyoxymethylene
    Patent number: 9765172
    Abstract: The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (RG) which comprises at least one formaldehyde source and at least one initiator mixture (IG), wherein the initiator mixture (IG) comprises at least one polymerization initiator and at least one solvent of the general formula (I) R1—O—[—R3—O—]m—R2??(I), where m is 1, 2, 3 or 4; R1 and R2 are each, independently of one another, C3-C6-alkyl; R3 is C1-C5-alkylene.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: September 19, 2017
    Assignee: BASF SE
    Inventors: Laurence Pottie, Juergen Demeter, Marie-Claire Hermant
  • PROCESS FOR PREPARING POLYOXYMETHYLENE
    Publication number: 20160115270
    Abstract: The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (RG) which comprises at least one formaldehyde source and at least one initiator mixture (IG), wherein the initiator mixture (IG) comprises at least one polymerization initiator and at least one solvent of the general formula (I) R1—O—[—R3—O—]m—R2??(I), where m is 1, 2, 3 or 4; R1 and R2 are each, independently of one another, C3-C6-alkyl; R3 is C1-C5-alkylene.
    Type: Application
    Filed: May 26, 2014
    Publication date: April 28, 2016
    Applicant: BASF SE
    Inventors: Laurence POTTIE, Juergen DEMETER, Marie-Claire HERMANT