Patents by Inventor Leendert B. Jongeling

Leendert B. Jongeling 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 optical fibres having a core and a cladding of glass applying the rod-in-tube technique
    Patent number: 4854956
    Abstract: The invention relates to a method of manufacturing optical fibres in which a quartz glass tube is coated on the inside with core material, the assembly is contracted to form a solid rod which is then inserted into a quartz glass tube, after which the assembly is drawn. The last tube is thermally treated to eliminate contaminations at the surface which may detrimentally influence the tensile strength of the ultimate fibre.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: August 8, 1989
    Assignee: U.S. Philips Corp.
    Inventors: Rene A. M. Pluijms, Emmanuel Papanikolau, Leendert B. Jongeling, Johannes M. A. Van Esdonk