Patents by Inventor Herve M. Cheradame

Herve M. Cheradame 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).

  • Direct synthesis by living cationic polymerization of nitrogen-containing polymers
    Patent number: 5629394
    Abstract: A method is provided for the direct synthesis by living cationic polymerization of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino, cyanato, thiocyanato or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 13, 1997
    Assignee: Exxon Chemical Patents Inc
    Inventors: Herve M. Cheradame, Frank J. Chen, Jon E. R. Stanat, Hung A. Nguyen, Behrooz R. Tabar
  • Direct synthesis by living cationic polymerization of nitrogen-containing polymers
    Patent number: 5444135
    Abstract: A method is provided for the direct synthesis by living cationic polymerization of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino, cyanato, thiocyanato or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: August 22, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Herve M. Cheradame, Frank J. Chen, Jon E. R. Stanat, Hung A. Nguyen, Behrooz R. Tabar
  • Terminally-substituted polymeric compositions from cationically polymerizable monomers and initiators
    Patent number: 5336745
    Abstract: A method is provided for the direct synthesis of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or of tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: August 9, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Herve M. Cheradame, Robert D. Lundberg, Frank J. Chen, Jean de la Crois Habimana
  • Direct synthesis by cationic polymerization of nitrogen-containing polymers
    Patent number: 5032653
    Abstract: A method is provided for the direct synthesis of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: July 16, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Herve M. Cheradame, Robert D. Lundberg, Frank J. Chen, Jean de la Croix Habimana
  • Macromolecular material of ionic conduction
    Patent number: 4357401
    Abstract: A solid electrolyte formed of a cross-linked elastomeric complex material charged with one or more ionizable salts of high ionic conduction.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: November 2, 1982
    Assignee: L'Etat Francais represente par le Delegue General pour l'Armement
    Inventors: Jean D. Andre, Andreas Killis, Jean-Francois Le Nest, Herve M. Cheradame
  • Process for producing a macromolecular compound having a functional group at each end of the molecule
    Patent number: 4125692
    Abstract: Di or polyfunctional macromolecular compounds having a terminal functional group at each end of the molecule are produced by selectively cleaving the carbon-carbon double bonds of an unsaturated polymer by the oxidizing action of a ruthenium tetroxide oxidizing system. The compounds are useful as components in crosslinked plastics materials, in binders for rocket fuels, and as components in tri or polysequential copolymers.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: November 14, 1978
    Assignee: Etat Francais represented by the "Delegue General pour l'Armement"
    Inventors: Herve M. Cheradame, Jacques H. Garapon, Christian G. Guizard, Maryvonne Brigodiot