Patents by Inventor Joel Perthuis

Joel Perthuis 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).

  • Aminotelechelic partially hydrogenated 1,3-diene oligomers and process for the preparation of these compounds
    Patent number: 5760157
    Abstract: Compounds of the formula?P!(ACH.sub.2 NH.sub.2).sub.xin which P denotes a partially hydrogenated 1,3-diene oligomer residue, x is practically equal to 2 and A denotes a divalent residue such as ##STR1## are obtained by selective hydrogenation of compounds of formula ?P.sub.1 !(ACN)x in which P.sub.1 denotes a 1,3-diene oligomer residue.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 2, 1998
    Assignee: Elf Atochem, S.A.
    Inventors: Martine Cerf, Stephane Fouquay, Joel Perthuis
  • Aromatic polycarbonates having reduced combustibility and methods for their preparation
    Patent number: 4645786
    Abstract: Polycarbonate-based compositions the fire-resistance of which is improved with small but effective amounts of a urazole salt having the formula: ##STR1## wherein R and R' are the same or different and are hydrogen, an alkyl group having from one to six carbon atoms, phenyl, or halosubstituted phenyl, and M is an alkali metal, many of such fire-resistive polycarbonates being transparent, together with method for preparing such fire-resistive polycarbonates.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: February 24, 1987
    Assignee: Atochem
    Inventors: Joel Perthuis, Pierre Poisson