Patents by Inventor Shaun Wingfield

Shaun Wingfield 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).

  • Glass compositions
    Patent number: 5605869
    Abstract: An on-glaze low expansion glass flux composition suitable for coating onto a glazed surface which is essentially free from lead and cadmium and comprises, in mole percent, SiO.sub.2 : 35 to 75%, Bi.sub.2 O.sub.3 : 4 to 12%, Al.sub.2 O.sub.3 : 2 to 12%, B.sub.2 O.sub.3 : 18 to 35%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O : 0 to 12% (in total), and certain other optional ingredients with the provisos that BaO is not contained in an amount of more than 2 mole percent, the total amount of Bi.sub.2 O.sub.3 +B.sub.2 O.sub.3 +Li.sub.2 O,Na.sub.2 O and K.sub.2 O is in the range of from 25 to 45 mole percent, the total amount of Li.sub.2 O, Na.sub.2 O and K.sub.2 O is in the range of up to 10 percent by weight except when the only alkali metal oxide present is Li.sub.2 O, and the composition has a coefficient of thermal expansion in the range of from 4.0 to 7.0.times.10.sup.-6 /.degree.C.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: February 25, 1997
    Assignee: Cookson Matthey Ceramics & Materials Limited
    Inventors: Harbans K. Mangat, Peter J. Smith, Richard J. Hall, Shaun Wingfield