Patents by Inventor Donna L. Day

Donna L. Day 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).

  • Reduced lead bismuth yellow brass
    Patent number: 5879477
    Abstract: Reduced lead bismuth yellow brasses are disclosed that are primarily useful for plumbing applications. Very low levels of grain refiners are used to increase dezincification resistance, to improve polishability, and for other desired characteristics. At least two grain refiners are selected from the group consisting of B, In, Ag, Ti, Co, Zr, Nb, Ta, Mo, Ga, Tl, and V. At least one of the grain refiners is selected from the group consisting of B, Ti, Co, Zr, Nb, Ta, Mo, Ga, Tl, and V and is between 0.0001% and 0.01% of the alloy. If Ag or In is a selected grain refiner, it is less than 0.25% of the alloy. Silver and gallium are preferred grain refiners.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: March 9, 1999
    Assignee: Kohler Co.
    Inventors: Roland L. Ruetz, Jan V. Vojta, Donna L. Day
  • Reduced lead bismuth yellow brass
    Patent number: 5360591
    Abstract: Reduced lead bismuth yellow brasses are disclosed that are primarily useful for plumbing applications. Very low levels of grain refiners are used to increase dezincification resistance, to improve polishability, and for other desired characteristics. Silver and boron are preferred grain refiners.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: November 1, 1994
    Assignee: Kohler Co.
    Inventors: Roland L. Ruetz, Jan V. Vojta, Donna L. Day