Patents by Inventor Johannus M. E. Van Laarhoven

Johannus M. E. Van Laarhoven 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 of providing a pattern of apertures and/or cavities in a plate of non-metallic material
    Patent number: 5800231
    Abstract: A method of providing a plurality of cavities and/or apertures in a plate or layer wherein, after the plate or layer has been provided with a mask having a plurality of apertures arranged in a pattern, at least one jet of abrasive powder particles is moved relative to the plate. On its exposed surface, the mask is provided with a coating which prevents substantial mechanical stresses from being generated in the mask during the process by the jet of powder particles.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: September 1, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus C.M. De Haas, Franciscus M.H. Van Laarhoven, Johannus M.E. Van Laarhoven, Henricus J. Ligthart, Petrus H.W. Swinkels, Johannes G. Van Beek
  • Method of providing a pattern of apertures and/or cavities in a plate of non-metallic material
    Patent number: 5730635
    Abstract: A method of providing a plurality of cavities and/or apertures in a plate or layer wherein, after the plate or layer has been provided with a mask having a plurality of apertures arranged in a pattern, at least one jet of abrasive powder particles is moved relative to the plate. On its exposed surface, the mask is provided with a coating which prevents substantial mechanical stresses from being generated in the mask during the process by the jet of powder particles.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: March 24, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus C. M. De Haas, Franciscus M. H. Van Laarhoven, Johannus M. E. Van Laarhoven, Henricus J. Ligthart, Petrus H. W. Swinkels, Johannes G. Van Beek