Patents by Inventor Gerrit Zwep

Gerrit Zwep 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).

  • X-ray tube for the examination of fine structures
    Patent number: 4205251
    Abstract: An additive which protects the anode against roughening is included in a surface layer of the anode of an X-ray source for generating X-rays within a comparatively narrow wavelength range. The additive is provided by deposition of material in vacuum, followed by diffusion of the material into the anode body.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: May 27, 1980
    Assignee: U.S. Philips Corporation
    Inventor: Gerrit Zwep
  • X-ray tube
    Patent number: 4196367
    Abstract: Disclosed is an X-ray tube for fluorescence analysis having an exit aperture which is closed by a window of non-uniform thickness. A thicker window portion is located at the side of the aperture remote from the anode and partly overlaps a thinner window plate. In an analysis apparatus, the thicker window portion is located in a portion of the window through which passes the radiation traversing a comparatively small distance between the anode and the specimen.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: April 1, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Willem H. Diemer, Gerrit Zwep