Patents by Inventor Christopher H. Welker

Christopher H. Welker 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).

  • UV absorbing lamp glass
    Patent number: 5350972
    Abstract: A UV absorbing soda-lime glass containing specific amounts of cerium oxide and iron oxide permits the use of significantly less CeO.sub.2 than is used in prior art glass. The amount of cerium oxide and iron oxide present is 0.02-0.07 wt. % and 0.02-0.06 wt. %, respectively, with a combined total typically no more than 0.13 wt. %. This glass is useful for fluorescent lamp envelopes in absorbing UVB radiation having a wavelength between 280-320 nm, while being transparent to visible light radiation without effecting the color of the light emitted by the lamp.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: September 27, 1994
    Assignee: General Electric Company
    Inventors: Gerald L. Bucher, Christopher H. Welker, Edward E. Hammer, Curtis E. Scott, Thomas F. Soules
  • Low-temperature devitrifiable sealing composition
    Patent number: 4097296
    Abstract: A devitrifiable sealing composition which provides a strong devitrified seal with color television picture tube glass at reduced sealing temperatures, and which is thermally compatible with such glass during sealing and subsequent tube processing, is described.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: June 27, 1978
    Assignee: Corning Glass Works
    Inventors: Walter B. Thomas, III, Christopher H. Welker