Patents by Inventor Leon Ghosez

Leon Ghosez 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 preparing polyorganosiloxanes by polymerization catalyzed by a catalytic system based on triflic acid or triflic acid derivatives
    Patent number: 6737495
    Abstract: The invention concerns a method for preparing polyorganosiloxanes (POS) by (a) condensation polymerisation of monosilanes and/or acyclic siloxanes bearing reactive Si—OR units with R═H, or alkyl, or by (b) redistribution/condensation polymerisation of siloxane compounds based on cyclosiloxanes and/or acyclic siloxanes capable of bearing reactive Si—OR units such as defined above, Si—H or Si-alkenyl units, in the presence of an acid catalyst.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: May 18, 2004
    Assignee: Rhodia Chimie
    Inventors: Christian Bordone, Jean-Roger Desmurs, Léon Ghosez, José Martins, Gérard Mignani
  • Method for preparing polyorganosiloxanes by polymerisation catalysed by a catalytic system based of triflic acid derivatives
    Publication number: 20030109659
    Abstract: The invention concerns a method for preparing polyorganosiloxanes (POS) by (a) condensation polymerisation of monosilanes and/or acyclic siloxanes bearing reactive Si—OR units with R=H, or alkyl, or by (b) redistribution/condensation polymerisation of siloxane compounds based on cyclosiloxanes and/or acyclic siloxanes capable of bearing reactive Si—OR units such as defined above, Si—H or Si-alkenyl units, in the presence of an acid catalyst.
    Type: Application
    Filed: October 2, 2002
    Publication date: June 12, 2003
    Inventors: Christian Bordone, Jean-Roger Desmurs, Leon Ghosez, Jose Martins, Gerard Mignani
  • N-benzyl-2,2-dimethoxy-acetamides
    Patent number: 4041077
    Abstract: N-benzyl-2,2-dimethoxy-acetamides having the formula ##STR1## and processes for preparing the same. These acetamides are useful for the production of 2H-3-isoquinolones by acid cyclization and said 2H-3-isoquinolones are in turn useful as starting materials inter alia in the synthesis of 1,4-dihydro-1,4-etheno-isoquinolin-3(2H)ones, which are valuable chemotherapeutic agents as disclosed in U.S. Pat. No. 3,781,436.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: August 9, 1977
    Assignee: U C B, Societe Anonyme
    Inventors: Leon Ghosez, Guy Rossey, Freddy Didderen
  • 3-(1,3-Dithian-2-yl)-4-cyclo-pentene-2-carboxylic acids, esters and amides
    Patent number: 3947469
    Abstract: The invention relates to the stereoisomers of novel cyclopentene derivatives and to the preparation thereof.The cyclopentene derivatives are obtained by cycloaddition reaction between cyclopentadiene and a mono-or bis-thioalkyl (or aryl) ketene and reaction between the obtained product and a nucleophile agent.The compounds of the invention are intermediate products valuable for the preparation of different compounds, among which compounds of the prostaglandin type.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: March 30, 1976
    Assignee: Recherche et Industrie Therapeutiques (R.I.T.)
    Inventors: Leon Ghosez, Eric Cossement, Robert Biname