Patents by Inventor Umberto Lui

Umberto Lui 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).

  • Soft ceramic kitchenware internally coated with a non-stick resin
    Patent number: 4591530
    Abstract: To assure anchorage of a non-stick resin (18) to the ceramic biscuit (10) of a kitchenware a bonding means is used made up of a lead-free frit (12) having a melting point lying between 500.degree. and 950.degree. C. and including a glaze which melts essentially at these temperatures and that penetrates and bonds inside the pores (15) of the biscuit, and at least one substance that does not melt at the melting temperature of the glaze and which forms surface grains, or ovules (17) enclosed in the melted part (16) and anchored to the base of the biscuit. The non-stick resin emulsion (18) is spread over the rough layer which is successively fired by fusion.
    Type: Grant
    Filed: April 19, 1984
    Date of Patent: May 27, 1986
    Assignee: T.V.S. S.p.A.
    Inventor: Umberto Lui