Patents by Inventor Jean-François Croisy

Jean-François Croisy 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 preparing sulphuric methacrylamide and device for implementing it
    Patent number: 6750368
    Abstract: The present invention relates to a process for preparing sulphuric methacrylamide. The process can include adding sulphur trioxide and a second part of acetone cyanohydrin without sulfuric add to a reaction medium, after a first part of acetone cyanohydrin with sulphuric acid free of sulfur trioxide is mixed and dehydrated by heating.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: June 15, 2004
    Assignee: Atofina
    Inventors: Jean-François Croisy, Michel Tosi
  • Process for preparing sulphuric methacrylamide and device for implementing it
    Publication number: 20030088123
    Abstract: The invention relates to a process for preparing sulphuric methacrylamide from acetone cyanohydrin.
    Type: Application
    Filed: July 12, 2002
    Publication date: May 8, 2003
    Inventors: Jean-Francois Croisy, Michel Tosi
  • Derivatives of norbornylane and of dimethanodecahydronaphthylane which can be used for obtaining new polymers
    Patent number: 5231220
    Abstract: Derivatives (I) of norbornylane and of dimethanodecahydornaphthylane of formula: ##STR1## in which: R is the hydrogen atom when n is equal to 1, orR is the acrylol or methacryloyl radical when n is equal to 0 or 1.Also disclosed are processes for the preparation of the derivatives (I) and their application in obtaining polymers and copolymers.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: July 27, 1993
    Assignee: Norsolor
    Inventors: Jean Francois Croisy, Paul Grosius