Patents by Inventor Olivio Caloni

Olivio Caloni 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 obtaining surfaces with a nacre like effect on gold or silver jewelry articles
    Patent number: 4151054
    Abstract: A process for obtaining a nacre effect on surfaces of gold, silver or alloys thereof, consisting in:Heating the metal having the highest purity degree up to a temperature higher than its melting point;Pouring of the molten material into a mold at a temperature compatible with the resistance of the mold;Allowing the material to cool into the mold;Performing a surface treatment on the article surfaces or portions thereof, where the nacre effect has to appear;Dipping the obtained article into an electrolytic bath including organic and/or inorganic salts, using a very low current density; andCarefully washing the obtained article.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: April 24, 1979
    Inventors: Olivio Caloni, Alfredo Cantini