Patents by Inventor Roelof Egbert Schuil

Roelof Egbert Schuil 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 manufacturing a cerium activated luminescent rare-earth aluminate
    Patent number: 4024070
    Abstract: A method of manufacturing a rare-earth aluminate, particularly a luminescent rare-earth aluminate, in which a starting mixture of the composite oxides or of compounds producing these oxides at an elevated temperature together with a flux is heated at a high temperature. At least one of the compounds rubidium fluoride, cesium fluoride and potassium fluoride is used as a flux.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: May 17, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Roelof Egbert Schuil
  • Color screen with space between luminescent regions pervious to thermal radiation from shadow mask
    Patent number: 3973160
    Abstract: A shadow mask tube having phosphor regions with negative tolerance, and the intermediate spaces between the phosphor regions on the face plate being devoid of usual light-absorbing material and the aluminum layer.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: August 3, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Constant Joseph Maria Geenen, Roelof Egbert Schuil
  • Cathode-ray tube provided with a luminescent silicate
    Patent number: 3943400
    Abstract: A cathode-ray tube particularly for flying spot scanners, provided with a luminescent silicate activated by cerium, defined by the formula Li.sub.1-x Na.sub.x Y.sub.1-p Ce.sub.p SiO.sub.4, in which 0 .ltoreq. x .ltoreq. 0.90 and 0.0001 .ltoreq. p .ltoreq. 0.25, which silicate has the olivine crystal structure.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: March 9, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Roelof Egbert Schuil
  • Cathodochromic sodalite
    Patent number: 3931042
    Abstract: A cathodochromic sodalite defined by the formula Na.sub.3 Al.sub.3 Si.sub.3 O.sub.12.NaX (X = Cl, Br or J) comprising at least one of the elements tin, lead and germanium in a quantity of between 0.05 and 2 atom % calculated with respect to silicon. The addition of the said elements results in an improvement of the reversible bleaching properties. Notably, a faster and also a more complete bleaching is obtained.
    Type: Grant
    Filed: June 20, 1973
    Date of Patent: January 6, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Roelof Egbert Schuil