Patents by Inventor Anthony J. Drago

Anthony J. Drago 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).

  • Cyanide-free plating solutions for monovalent metals
    Patent number: 5302278
    Abstract: A solution for use in electroplating which comprises at least one monovalent metal such as copper, silver or gold which is complexed by a thiosulfate ion; and a stabilizer of an organic sulfinate compound such as, for example, one having the formula R-SO.sub.2 -X wherein R is an alkyl, heterocyclic or aryl moiety and X is a monovalent cation. The stabilizer is present in an amount sufficient to stabilize the thiosulfate ion when the solution is operated at an acidic pH of less than 7. Also, the solution is substantially free of cyanide.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: April 12, 1994
    Assignee: Learonal, Inc.
    Inventors: Fred I. Nobel, William R. Brasch, Anthony J. Drago
  • Cyanide-free plating solutions for monovalent metals
    Patent number: RE35513
    Abstract: A solution for use in electroplating which comprises at least one monovalent metal such as copper, silver or gold which is complexed by a thiosulfate ion; and a stabilizer of an organic sulfinate compound such as, for example, one having the formula R-SO.sub.2 -X wherein R is an alkyl, heterocyclic or aryl moiety and X is a monovalent cation. The stabilizer is present in an amount sufficient to stabilize the thiosulfate ion when the solution is operated at an acidic pH of less than 7. Also, the solution is substantially free of cyanide.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: May 20, 1997
    Assignee: Learonal, Inc.
    Inventors: Fred I. Nobel, William R. Brasch, Anthony J. Drago