Patents by Inventor Walter C. Bradbury

Walter C. Bradbury 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).

  • Patent number: 4162205
    Abstract: An improved electrotinplating process and electroplating bath therefor is disclosed. The electroplating bath contains tin ions, an alkali metal hydroxide, and a bismuth compound selected from the group consisting of at least one alkali metal bismuth salt of a linear polyhydroxymonocarboxylic acid having at least six carbon atoms, at least one alkali metal bismuthyl compound of glucono-delta-lactone, and mixtures thereof. The alkali metal bismuth compounds of this invention exhibit increased solubility and long-term stability in hot alkaline alkali metal stannate electroplating baths when compared to conventional alkali metal bismuthates. A preferred alkali metal bismuth compound is an alkali metal bismuthyl gluconate. An improved electrotinplating process is therefore provided which produces a plated tin-bismuth alloy which is resistant to the effects of tin pest.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: July 24, 1979
    Assignee: Vulcan Materials Company
    Inventors: Harold P. Wilson, Walter C. Bradbury