Patents by Inventor Hai Lecong

Hai Lecong 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).

  • Seamless flush mounted countertop sink
    Patent number: 5683638
    Abstract: A process for fabricating a seamless flush mounted countertop sink, which includes the steps of constructing a sink bowl (22) that has an outwardly extending peripheral top flange (26). The sink bowl is then captivated upside-down on a flat mold (34) and uncured filled polymer (40) is poured on the mold and flattened to a level above the flange, creating an integral countertop sink (44). The polymer is vibrated and cured. In the preferred embodiment, the top surface of the countertop is sanded smooth and, in the second embodiment, a clear gelcoat is added prior to pouring, creating a glossy finish. The third embodiment spaces the sink bowl flange within the thickness of the countertop (42) and is finished by either sanding, or a previous gelcoat is added, as above.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: November 4, 1997
    Assignee: Excelstone International, Inc.
    Inventors: Arthur J. Crigler, Hai Lecong