Patents by Inventor Harry Ericson

Harry Ericson 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).

  • Solutions for chemically polishing surfaces of copper and its alloys
    Patent number: 4086176
    Abstract: A solution for chemically polishing surfaces of copper and its alloys contains acid oxalates at a pH value of 3.0 - 5.0 in combination with hydrogen peroxide and one or more stabilizers and brighteners.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: April 25, 1978
    Assignee: Nordnero AB
    Inventors: Harry Ericson, Carl Otto Fredriksson
  • Solutions for cleaning surfaces of copper and its alloys
    Patent number: 4051057
    Abstract: A solution for pickling copper and its alloys contains one or more mineral acids, such as sulphuric acid or phosphoric acid, in combination with hydrogen peroxide and a hydroxy acid, such as citric acid or gluconic acid, together with a nitrogen combination of the type substituted triazole and/or a tertiary amine of the general formula ##STR1## in which R is an aliphatic carbon chain containing less than 24 carbon atoms and the sum of n.sub.1 and n.sub.2 is less than 30.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: September 27, 1977
    Inventors: Harry Ericson, Carl Otto Fredriksson