Patents by Inventor Siegfried Nerche

Siegfried Nerche 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 porous carbon body
    Patent number: 4024226
    Abstract: A foamed synthetic body is impregnated with a resin which can be converted into vitreous carbon by heating, after which by raising the temperature the body is dried and the resin is hardened, after which, if desired, one or more surfaces of the body are again treated with the impregnating agent and the body is then carbonized by further rise in temperature. In order to ensure that the foamed synthetic body remains stable during the whole preparation, the body is soaked with liquid epoxide resin or an aqueous polyvinyl alcohol solution before impregnation.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: May 17, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Bernhard Lersmacher, Siegfried Nerche, Karlheinz Schelhas