Patents by Inventor Jozef Schouwenaars

Jozef Schouwenaars 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).

  • Method and device for polishing gemstones
    Patent number: 5816896
    Abstract: A method for polishing a gemstone includes providing a polishing surface (11), mounting the gemstone in a holder (6) of a clamp (1), and choosing a reference plane (33) so that it corresponds to the polishing surface. Then the facet polishing depth is set by bringing the gemstone into a position with respect to the reference plane (33) which the gemstone will occupy after completion of polishing the facet. At the moment when the clamp occupies a same position with respect to the polishing surface as the clamp previously occupied with respect to the reference plane, polishing is stopped.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: October 6, 1998
    Assignee: Wetenschappelijk en Technisch Onderzoekscentrum Voor Diamant
    Inventor: Jozef Schouwenaars