Patents by Inventor Samuel Dagorne

Samuel Dagorne 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).

  • POLYMERIZATION METHOD
    Publication number: 20150307656
    Abstract: A novel polymerisation method employing novel cationic Zinc-complexes as catalyst is devised.
    Type: Application
    Filed: December 9, 2013
    Publication date: October 29, 2015
    Inventors: Samuel DAGORNE, Frederic HILD
  • N-Heterocyclic Carbene Based Zirconium Complexes For Use In Lactones Ring Opening Polymerization
    Publication number: 20130281653
    Abstract: This invention is reporting new N-heterocyclic carbene based zirconium (or hafnium) complexes and their uses as catalysts for the lactones ring opening polymerization. These new catalysts are robust and versatile and exert control over polymer molecular weight and/or stereochemistry and exhibit high reactivity (cf. for low temperature applications). In particular the new catalysts show both enhanced activity and at the same time a better selectivity than the catalysts employed by the prior art.
    Type: Application
    Filed: December 5, 2011
    Publication date: October 24, 2013
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Pascal Steffanut, Charles Romain, Samuel Dagorne, Stephane Bellemin-Laponnaz
  • Cationic group 13 complexes incorporating bidentate ligands as polymerization catalysts
    Patent number: 6228794
    Abstract: Disclosed are novel catalysts, processes of synthesizing the catalysts and to olefin polymerization processes using the catalysts. The catalysts are cationic complexes comprising a Group 13 element and certain ligands. These compounds behave similarly to Ziegler-Natta catalysts but effectively catalyze the polymerization of olefins in the absence of any transition metal.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: May 8, 2001
    Assignee: University of Iowa Research Foundation
    Inventors: Richard F. Jordan, Martyn P. Coles, Samuel Dagorne, Eiji Ihara