Patents by Inventor Fran.cedilla.ois Schue

Fran.cedilla.ois Schue 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).

  • Highly pure alkyl 2-cyanoacrylates
    Patent number: 6057472
    Abstract: A process for the preparation of a highly pure alkyl 2-cyanoacrylate, wherein alkyl has 1-10 C atoms, characterized in thata) formaldehyde is reacted with an alkyl cyanoacetate ester by means of a catalyst in a solvent mixture selected from the group comprising ethylacetate, diglyme, dichloroethane and benzene, yielding an oligo-(alkyl 2-cyanoacrylate);b) the product of (a) is separated in the form of a solid;c) the product of (b) is depolymerized under sulfur dioxide atmosphere free from other polymerization inhibitors to yield an alkyl 2-cyanoacrylate with a purity of 98-100%
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: May 2, 2000
    Assignee: Merck Patent GmbH
    Inventors: Valerie Sailhan, Rosy Eloy, Louis Giral, Fran.cedilla.ois Schue