Patents by Inventor Ariello Rolando Corradi

Ariello Rolando Corradi 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).

  • Process for preparing acicular iron powders containing titanium and tin, and the resulting powders when so prepared
    Patent number: 4056410
    Abstract: A process is disclosed for preparing metallic powders based on iron and suitable for magnetic recording, starting from acicular particles of an iron compound selected from the class consisting of .alpha.-Fe.sub.2 O.sub.3, .alpha.-FeOOH and Fe.sub.3 O.sub.4, by reduction with a gas containing more than 50% by volume of hydrogen, characterized in that the particles of the iron compound are treated with titanium, in the form of TiO(OH).sub.2 or TiO.sub.2, and with tin, in the form of Sn(OH).sub.2 or SnO(OH).sub.2 ; after which they are subjected to at least a heat treatment in air at 400.degree.-550.degree. C; and finally to a reducing treatment at 340.degree.-420.degree. C. The titanium is employed in an amount of 0.5-1% by weight, calculated as TiO.sub.2, and the tin in an amount of 3-6% by weight, based on pure iron.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: November 1, 1977
    Assignee: Montedison, S.p.A.
    Inventors: Ariello Rolando Corradi, Giuliano Fagherazzi