Patents by Inventor Roberto Passarotto

Roberto Passarotto 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).

  • Kiln for producing litharge by means of the calcination of massicot
    Patent number: 5144108
    Abstract: The kiln (1) for producing litharge has a thermally insulated tubular body (2) containing, throughout its length, a shaft (30) with paddles acting as an auger. The tubular body (2) is coaxial with an induction coil (11), which heats it. The raw material in powder form (i.e., the massicot) is charged at a first head (9) of the tubular body (2) and is moved forwards by the paddle shaft (30), until it reaches the second head (10), opposite to the first one (9). During the translation the material (massicot) is heated and is oxidated, being converted into litharge.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: September 1, 1992
    Assignee: Minemet Italia S.p.A.
    Inventor: Roberto Passarotto