Patents by Inventor Caspert G. I. van der Staak

Caspert G. I. van der Staak 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).

  • Transmission projection screen and method of manufacturing same
    Patent number: 4688093
    Abstract: The invention relates to a transmission projection screen having a high light output and a suitable contrast, for example for use in a projection television system, and a method of manufacturing such a screen.The projection screen comprises a transparent substrate having a front surface which is provided with mutually parallel ribs 2. At the bottom of the grooves 4 between the ribs 2 two individual layers of light-absorbing particles 11 and 12 are provided. The said particles are fixed by means of an adhesive layer 14.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: August 18, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Caspert G. I. van der Staak, Johannes C. van de Ven
  • Transmission projection screen and method of manufacturing same
    Patent number: 4660930
    Abstract: The projection screen has a transparent substrate having a front surface which is provided with mutually parallel ribs. Light-absorbing particles 7 whose size is 20 to 75% of the width of the grooves measured halfway the depth of these grooves, are disposed at the bottom of the grooves 4 between the ribs 2. The particles are fixed by means of a glue layer 6.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: April 28, 1987
    Assignee: U. S. Philips Corporation
    Inventors: Gustaaf H. A. van der Hoorn, Caspert G. I. van der Staak, Joseph J. M. Lamberts, Johannes H. A. Schmitz
  • Dye-containing layer of a film-forming polymeric binder and the use thereof in an information recording element
    Patent number: 4364986
    Abstract: Dye-containing layer of a film-forming polymeric binder and the application thereof in an information recording element.The invention relates to a dye-containing layer in which dye, if desired in a very large weight percentage is dissolved or finely divided in a copolymer (1:1) of methyl vinyl ether and maleic anhydride or a semi-ester thereof.The dye-containing layer is particularly suitable for use as a recording layer in an optical information recording element.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: December 21, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Zwanenburg, Wilhelmus P. M. Nijssen, Caspert G. I. van der Staak