Patents by Inventor Karel V. Baelen

Karel V. Baelen 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).

  • Method of producing dealkalized sheet glass
    Patent number: 5292354
    Abstract: A method of producing dealkalized sheet glass in which sheet glass is dealkalized in stages. The method includes dealkalizing sheet glass in a first stage by exposing the sheet glass to contact with a first dealkalizing medium including at least one acid gas for a period of at least 1 minute while the sheet glass is at a temperature above 400.degree. C.; and further dealkalizing the sheet glass in a subsequent stage by exposing the sheet glass after the first stage to contact with a second dealkalizing medium including at least one acid gas for a period of at least 3 minutes while the sheet glass is at a temperature which is at least 50.degree. C. below one of the temperature of the sheet glass during the first stage and the minimum temperature of the sheet glass during the first stage, and ranges between 400.degree. C. and 250.degree. C.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: March 8, 1994
    Assignee: Glaverbel, Societe Anonyme
    Inventors: Andre Hecq, Camille Dupont, Karel V. Baelen