Patents by Inventor Osvaldo Gobbetti

Osvaldo Gobbetti 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).

  • Electrochemical graining of aluminum or aluminum alloy surfaces
    Patent number: 5064511
    Abstract: Aluminum or its alloys are electrochemically grained by using alternate current and an aqueous electrolyte comprising specific amounts of hydrochloric acid and an oxy-acid and/or a dicarboxylic acid, preferably lactic acid and/or succinic acid, respectively. Aluminum (or an alloy thereof) thus grained, can be coated with a photosensitive layer whereby forming a printing plate. Before coating it with the photosensitive layer, the plate can also be anodized by techniques well known to those skilled in the art.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: November 12, 1991
    Assignee: Diaprint S.r.l.
    Inventor: Osvaldo Gobbetti