Patents by Inventor Carlus J. Van Der Poel

Carlus J. Van Der Poel 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).

  • Erasable optical recording element and method of optically recording and erasing information
    Patent number: 4818666
    Abstract: Erasable optical recording element according to FIG. 1 having a substrate 1 and a recording layer 4 which is provided thereon and which satisfies the formula (QSb).sub.100-x M.sub.x, wherein Q is the element Ga or In, M is a metal or chalcogenide element and x has the value 2-15, as well as a method of optically recording and erasing information in which under the influence of pulsated laser light amorphous info areas 10 are formed in the recording layer 4, which areas can be reverted by laser light to the crystalline phase and can be erased.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: April 4, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Gravesteijn, Carlus J. Van Der Poel