Patents by Inventor Roberto Negroni

Roberto Negroni 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).

  • Honeycomb muffle in tank furnaces for glass melting
    Patent number: 4213753
    Abstract: Honeycomb muffle in tank furnaces for glass melting, comprising blocks of refractory material, characterized in that at least the crown of each furnace is made of blocks of refractory material, the free surface of which facing inwardly of the furnace is shaped with at least one recess defined by projecting ribs.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: July 22, 1980
    Inventors: Eugenio Negroni, Roberto Negroni