Patents by Inventor Gottfried Mollenstedt

Gottfried Mollenstedt 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).

  • Charged particle beam apparatus with charge-up compensation
    Patent number: 5045705
    Abstract: A charged particle beam apparatus comprising a particle source for generating a particle beam to irradiate a specimen located in a field space of a particle lens of the apparatus is provided with an auxiliary particle source for generating a particle beam of low energy particle to be injected into the lens field space and to be directed to the surface of the specimen by the same lens field.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: September 3, 1991
    Assignee: U.S. Philips Corp.
    Inventor: Gottfried Mollenstedt
  • Cathode for electron emission
    Patent number: 4258283
    Abstract: A cathode assembly for electron emission, comprises, a heatable support of high-temperature resistant material, an emitter body of lanthanum hexaboride, and an auxiliary body having a surface contact with both the support and the emitter body, which is made of a third material, comprising a sintered material of the class of carbides, nitrides and borides. The surface contact area between the auxiliary body and the support amounts to at least 1/6 of the surface area of the emitter body.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: March 24, 1981
    Assignee: Balzers Aktiengesellschaft fur Hochvakuumtechnik und Dunne Schichten
    Inventors: Wilhelm Brunger, Gottfried Mollenstedt
  • Electron beam scanning apparatus for the structural analysis of specimens
    Patent number: 3993905
    Abstract: In an electron beam scanning apparatus with ray penetration of the specimen, an additional deflection system provided between the specimen and the detector directs the transmitted primary beam always to the same point of the detector. The detector has different zones for separately registering the primary beam portion and the scattered portion, respectively, of the radiation penetrating the specimen.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: November 23, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventor: Gottfried Mollenstedt