Patents by Inventor Lothar Riebel

Lothar Riebel 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 organocatalytic ring-opening polymerization
    Patent number: 9512266
    Abstract: The present invention relates to a process for organocatalytic ring-opening polymerization of at least one monomer M suitable for ring-opening polymerization, or of mixtures thereof, wherein, in a step (i), at least one N-heterocyclic compound is subjected in the presence of at least one Zerevitinov-active compound Z1 to a temperature of at least 80° C. for a period of at least 30 seconds and, in a step (ii), the monomer M is added and reacted.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: December 6, 2016
    Assignee: BASF SE
    Inventors: Kerstin Wiss, Sirus Zarbakhsh, Achim Loeffler, Peter Deglmann, Lothar Riebel, Michael Limbach, Ronald Lindner, Michael Ludwik Lejkowski, Julia Frauke Grosse-Willerich
  • PROCESS FOR ORGANOCATALYTIC RING-OPENING POLYMERIZATION
    Publication number: 20150197599
    Abstract: The present invention relates to a process for organocatalytic ring-opening polymerization of at least one monomer M suitable for ring-opening polymerization, or of mixtures thereof, wherein, in a step (i), at least one N-heterocyclic compound is subjected in the presence of at least one Zerevitinov-active compound Z1 to a temperature of at least 80° C. for a period of at least 30 seconds and, in a step (ii), the monomer M is added and reacted.
    Type: Application
    Filed: January 15, 2015
    Publication date: July 16, 2015
    Applicant: BASF SE
    Inventors: Kerstin WISS, Sirus Zarbakhsh, Achim Loeffler, Peter Deglmann, Lothar Riebel, Michael Limbach, Ronald Lindner, Michael Ludwik Lejkowski, Julia Frauke Grosse-Willerich
  • Process for organocatalytic ring-opening polymerization
    Patent number: 9056945
    Abstract: The present invention relates to a process for organocatalytic ring-opening polymerization of at least one monomer M suitable for ring-opening polymerization, or of mixtures thereof, wherein, in a step (i), at least one N-heterocyclic compound is subjected in the presence of at least one Zerevitinov-active compound Z1 to a temperature of at least 80° C. for a period of at least 30 seconds and, in a step (ii), the monomer M is added and reacted.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: June 16, 2015
    Assignee: BASF SE
    Inventors: Kerstin Wiss, Sirus Zarbakhsh, Achim Loeffler, Peter Deglmann, Lothar Riebel, Michael Limbach, Ronald Lindner, Michael Ludwik Lejkowski, Julia Frauke Grosse
  • PROCESS FOR ORGANOCATALYTIC RING-OPENING POLYMERIZATION
    Publication number: 20130253164
    Abstract: The present invention relates to a process for organocatalytic ring-opening polymerization of at least one monomer M suitable for ring-opening polymerization, or of mixtures thereof, wherein, in a step (i), at least one N-heterocyclic compound is subjected in the presence of at least one Zerevitinov-active compound Z1 to a temperature of at least 80° C. for a period of at least 30 seconds and, in a step (ii), the monomer M is added and reacted.
    Type: Application
    Filed: March 26, 2013
    Publication date: September 26, 2013
    Applicant: BASF SE
    Inventors: Kerstin Wiss, Sirus Zarbakhsh, Achim Loeffler, Peter Deglmann, Lothar Riebel, Michael Limbach, Ronald Lindner, Michael Ludwik Lejkowski, Julia Frauke Grosse