Patents by Inventor Francis Van Meyel

Francis Van Meyel 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).

  • Patent number: 5114486
    Abstract: A new process for the production of pigments suitable for use in paper laminates has been developed in which a metal oxide is treated with a water-soluble salt of zinc and a phosphate or phosphoric acid and subsequently with an alkali metal aluminate in such a manner that there is deposited on the metal oxide a coating containing zinc and phosphate ions together with aluminium ions. The pH of the dispersion following the metal oxide is maintained at a value not exceeding 8.0 during precipitation. A particularly useful pigment is produced which has a coating containing zinc ions in an amount of 0.5 to 5% by weight as ZnO, phosphate ions in an amount of 0.2 to 3% as P.sub.2 O.sub.5 and aluminium ions in an amount of 0.5 to 5% expressed as Al.sub.2 O.sub.3 on the weight of TiO.sub.2.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: May 19, 1992
    Assignee: Tioxide Group PLC
    Inventors: Maria Demosthenous, Francis Van Meyel