Patents Assigned to W. Canning & Company, Ltd.
  • Electrodeposition of zinc and additive therefore
    Patent number: 4071419
    Abstract: Bright zinc plate is obtained from alkaline, cyanide-free zinc plating baths containing at least one linear polyamine obtained by condensing an aliphatic diamine with an aliphatic dihalide. Especially good results are obtained if the bath also contains at least one substituted pyridine compound in the form of a free base or as a quaternised derivative. A brightener composition containing both the linear polyamine and the pyridine compound can be added to alkaline, cyanide-free zinc plating baths.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: January 31, 1978
    Assignee: W. Canning & Company, Ltd.
    Inventor: Barrie Sydney James
  • Electrodeposition of zinc and additives therefor
    Patent number: 4071418
    Abstract: Bright zinc plate is obtained from alkaline, cyanide-free zinc plating baths containing (a) at least one linear polyamine obtained by condensing an aliphatic diamine containing at least one tertiary amino group with a 1,3-dihalopropan-2-ol, and (b) at least one substituted pyridine compound in the form of a free base or as a quaternized derivative. A brightener composition containing the linear polyamine and the pyridine compound can be added to alkaline, cyanide-free zinc plating baths.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: January 31, 1978
    Assignee: W. Canning & Company, Ltd.
    Inventor: Barrie Sydney James