Patents Assigned to Crown City Plating Company
  • Aqueous noble metal suspensions for one stage activation of nonconductors for electroless plating
    Patent number: 4004051
    Abstract: An aqueous noble metal suspension capable of one stage activation of the surface of a nonconductor for electroless plating is provided by reducing a noble metal ion in an aqueous solution of a noble metal salt with a non-complexing reducing agent for the noble metal ion in the presence of a water soluble organic suspending agent.The particulate noble metal is rapidly absorbed by a nonconducting surface over a broad range of operating temperatures when the suspension is maintained at a pH below 3.5.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: January 18, 1977
    Assignee: Crown City Plating Company
    Inventors: Leon A. Kadison, Eileen Maguire
  • Aqueous suspensions for surface activation of nonconductors for electroless plating
    Patent number: 3958048
    Abstract: Water soluble salts of metals other than the noble metals, such as copper and nickel salts, are converted in the presence of a water soluble suspending agent to suspensions of water insoluble catalytic particles which are absorbable onto the surface of nonconductors to permit electroless plating of the surfaces.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: May 18, 1976
    Assignee: Crown City Plating Company
    Inventors: Lawrence P. Donovan, Eileen Maguire, Leon A. Kadison