Patents by Inventor Stéphane Randu

Stéphane Randu 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 preparation of low-viscosity (poly) isocyanates
    Patent number: 8039574
    Abstract: A low viscosity polyisocyanate composition containing at least one isocyanate dimer having a uretidinedione unit is prepared from a reaction medium containing at least one isocyanate monomer in which the isocyanate groups are borne by sp3 carbon atoms. The reaction medium is heated, in the absence of a dimerization catalyst, to a temperature of at least 50° C. and not more than 200° C. for a period of not more than 24 hours.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: October 18, 2011
    Assignee: Rhodia Chimie
    Inventors: Eugènie Charriere, Jean-Marie Bernard, Denis Revelant, Stéphane Randu, Michel Carlo
  • Method for the preparation of low-viscosity (poly) isocyanates
    Publication number: 20040106762
    Abstract: A low viscosity polyisocyanate composition containing at least one isocyanate dimer having a uretidinedione unit is prepared from a reaction medium containing at least one isocyanate monomer in which the isocyanate groups are borne by sp3 carbon atoms. The reaction medium is heated, in the absence of a dimerization catalyst, to a temperature of at least 50° C. and not more than 200° C. for a period of not more than 24 hours.
    Type: Application
    Filed: October 10, 2003
    Publication date: June 3, 2004
    Applicant: RHODIA CHIMIE
    Inventors: Eugenie Charriere, Jean-Marie Bernard, Denis Revelant, Stephane Randu, Michel Carlo