Patents by Inventor Hubertus J. E. M. Schrans

Hubertus J. E. M. Schrans 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 manufacturing solid glass preforms from hollow preforms
    Patent number: 4746345
    Abstract: Solid glass preforms are made by externally heating a tubular preform by a plasma which is reciprocated along the hollow tube. The plasma gas consists entirely or partly of a molecular gas (N.sub.2 or O.sub.2, for example). The hollow preform is preferably rotated during collapsing.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: May 24, 1988
    Assignee: U.S. Philips Corp.
    Inventors: Rene A. M. Pluijms, Jacob W. de Ruiter, Hubertus J. E. M. Schrans, Johannes P. de Meij