Patents by Inventor Vittorio Alesse

Vittorio Alesse 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).

  • 2-mercapto-benzoxazole derivatives as collectors for the selective flotation of metal ores
    Patent number: 5505310
    Abstract: A process for the selective flotation of at least one sulfide selected from the group of copper sulfide, silver sulfide, and activated zinc sulfide performed in the presence of 2-mercapto-benzoxazole derivatives.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: April 9, 1996
    Assignee: Consiglio Nazionale delle Ricerche
    Inventors: Anna Marabini, Giorgio Bornengo, Vittorio Alesse, Fabrizio Bergamini
  • Process for separating and recovering lead, rubber and copper wires from waste cables
    Patent number: 5169073
    Abstract: The present invention relates to a process for separating and recovering copper wires, lead grains coming and rubber grains coming from waste cables, through washing, gravimetric separation, screening and by flattening the lead grains thereby facilitating their ready recovery.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: December 8, 1992
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Anna Marabini, Thomas Meloy, Pei C. Huang, Vittorio Alesse
  • Process for the selective flotation of metal ores using 2-mercaptothi-azole derivatives
    Patent number: 5120432
    Abstract: A process for the selective flotation of metal ores is described, wherein ionic organic collectors are utilized, which have the formula: ##STR1## where R and R.sub.1, like or different from each other, represent: H, a halogen, a straight or branched C.sub.1-9 alkyl group, an alkoxyl or hydroxyalkyl group in which the alkyl moiety contains from 1 to 9 carbon atoms, or a phenyl group; and M represents: H, Na, K, Li, Cs, NH.sub.4.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: June 9, 1992
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Giorgio Bornengo, Anna Marabini, Vittorio Alesse
  • Collecting agents for the selective flotation of lead and zinc ores and a process for preparing the same
    Patent number: 4851037
    Abstract: Ionic organic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula ##STR1## wherein the symbols employed have the meaning given below: R represents H, CH.sub.3, C.sub.2 H.sub.5, or an alkoxyalkyl group,R.sub.1 and R.sub.2, which can be the same or different, represent H, a linear or a branched alkyl group, an alkoxyalkyl group or a hydroxyalkyl group containing up to 12 carbon atoms;X represents H, Cl, Br, I, F, CN, CONH.sub.2, NO.sub.2 ;m represents H, Na, K, Li, Cs;as well as a process for the production of said collecting agents.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: July 25, 1989
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Giorgio Bornengo, Filippo M. Carlini, Anna Marabini, Vittorio Alesse
  • Collecting agents for the selective flotation of lead and zinc ores
    Patent number: 4724072
    Abstract: Organic ionic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula: ##STR1## wherein the symbols have the following meanings: R represents an alkoxyl group having from 3 to 12 carbon atoms;R.sub.1 represents H, a linear or branched chain alkyl group, an alkoxyl or hydroxyalkyl group containing up to 12 carbon atoms;X represents H, Cl, Br, I, F, CN, CONH.sub.2, NO.sub.2, SO.sub.2 NH.sub.2 ;M represents H, Na, K, Li, Cs.
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: February 9, 1988
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Giorgio Bornengo, Filippo M. Carlini, Maria A. Marabini, Vittorio Alesse