Patents by Inventor Walter Berti

Walter Berti 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 for making cathodes for neon and argon gas filled tubes
    Patent number: 4973282
    Abstract: A method for making gaseous discharge lamp cathodes comprises, in order to perfectly center the cathode with respect to the tube glass envelope, the steps of: (a) narrowing the end portion of the metal cathode near the edge thereof, (b) fully inserting, about the narrowed zone, a circular crown shaped mica small collar and (c) upsetting the edge so as to lock the mica collar in place.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: November 27, 1990
    Inventors: Walter Berti, Elena Berti