Patents by Inventor Virgilius Christiaan Johannes Nicolaas Van Liempd

Virgilius Christiaan Johannes Nicolaas Van Liempd 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).

  • Advanced epoxy resin from mixing polyepoxide and OH- or COOH-compound as feedstream
    Patent number: 6262189
    Abstract: The invention provides for a process for the preparation of an advanced epoxy resin by reaction of a compound having on average more than one epoxy group per molecule and a compound having on average one or more hydroxyl group or carboxyl group per molecule in the presence of a catalyst at elevated temperature, the process comprising (1) mixing the epoxy compound, the hydroxyl compound or the carboxyl compound and the catalyst, and (2) transferring the mixture as a feedstream to a surface which is at least intermittently moving with respect to the feedstream. In a preferred embodiment an endless conveyer belt with additional heating means and optional cooling means are used.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: July 17, 2001
    Assignee: Shell Oil Company
    Inventors: Johannes Petrus Jozef Beerepoot, Johannes Jozias Blom, Feike De Jong, Wilhelmina Johanna Maria Van Der Linden-Lemmers, Willem Sjardijn, Virgilius Christiaan Johannes Nicolaas Van Liempd, Paulus Egidius Raas
  • Advanced epoxy resins
    Patent number: 6022931
    Abstract: The invention provides for a process for the preparation of an advanced epoxy resin by reaction of a compound having on average more than one epoxy group per molecule and a compound having on average one or more hydroxyl group or carboxyl group per molecule in the presence of a catalyst at elevated temperature, the process comprising (1) mixing the epoxy compound, the hydroxyl compound or the carboxyl compound and the catalyst, and (2) transferring the mixture as a feedstream to a surface exposed to an elevated temperature sufficient to produce an advanced epoxy resin which is at least intermittently moving with respect to the feedstream. In a preferred embodiment an endless conveyer belt with additional heating means and optional cooling means are used.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: February 8, 2000
    Assignee: Shell Oil Company
    Inventors: Johannes Petrus Jozef Beerepoot, Johannes Jozias Blom, Feike De Jong, Wilhelmina Johanna Maria Van Der Linden-Lemmers, Willem Sjardijn, Virgilius Christiaan Johannes Nicolaas Van Liempd, Paulus Egidius Raas
  • Process for the preparation of advanced resins
    Patent number: 5824752
    Abstract: The invention provides for a process for the preparation of an advanced resin by reaction of a compound having on average more than one epoxy group per molecule and a compound having on average one or more hydroxyl group or carboxyl group per molecule in the presence of a catalyst at elevated temperature, the process comprising (1) mixing the epoxy compound, the hydroxyl compound or the carboxyl compound and the catalyst, and (2) transferring the mixture as a feedstream to a surface exposed to an elevated temperature sufficient to produce an advanced epoxy resin which is at least intermittently moving with respect to the feedstream. In a preferred embodiment an endless conveyer belt with additional heating means and optional cooling means are used.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: October 20, 1998
    Assignee: Shell Oil Company
    Inventors: Johannes Petrus JozeF Beerepoot, Johannes Jozias Blom, Feike De Jong, Wilhelmina Johanna Maria Van Der Linden-Lemmers, Willem Sjardijn, Virgilius Christiaan Johannes Nicolaas Van Liempd, Paulus Egidius Raas