Patents by Inventor Kay L. Tucker

Kay L. Tucker 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).

  • Low toxicity alloy compositions for joining and sealing
    Patent number: 4929423
    Abstract: A lead-free alloy for joining and sealing which is useful as a plumbing solder comprises from 0.08 to 20% by weight of bismuth, from 0.02 to 1.5% by weight of copper, from 0.01 to 1.5% by weight of silver, from 0 to 0.10 percent by weight of phosphorus, from 0 to 0.20% of a rare earth mixture and the balance tin, together with incidental impurities. The alloy has a similar pasty range (i.e. melting temperature and melting range) to the traditional tin-lead plumbing solders.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: May 29, 1990
    Assignee: Cookson Group plc
    Inventors: Kay L. Tucker, Ulysses Ma