Patents by Inventor Vadim Petrovich Lavrischev

Vadim Petrovich Lavrischev 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 making coloured photomasks
    Patent number: 3933609
    Abstract: The method of making coloured photomasks used in manufacture of printed-circuit boards and microcircuits, consisting in doping the surface of a glass substrate with a staining metal by virtue of a repeated electrodiffusion of the ions of the staining metal occurring from diverse melts, followed by reduction of the staining metal. Further on, a protective layer is applied to the glass substrate stained layer, corresponding to a predetermined pattern, the unprotected portions of the stained layer are removed and the protective layer is eliminated.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: January 20, 1976
    Inventors: Jury Sergeevich Bokov, Valery Nikolaevich Gurzheev, Vladimir Ivanovich Zakharov, Vladimir Sergeevich Korsakov, Vadim Petrovich Lavrischev, Alla Grigorievna Goron, Mark Leonovich Glikman, Nikolai Nikolaevich Semenov, Viktor Yakovlevich Matvienko