Patents by Inventor Wilfried Cramer

Wilfried Cramer 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).

  • Optical fibers, and a process for their production
    Patent number: 5204930
    Abstract: Optical fibres, and a process for their production, are described which comprise tubular plastic cladding and a core of a polymer whose refractive index is at least 1% greater than that of the cladding material. The core is obtained from a polymerisable mixture which comprises compounds containing epoxy groups, of which at least 10% by weight are siloxanes containing epoxy groups.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: April 20, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Dieter Brandt, Wolfgang Ebert, Udo Wolf, Wilfried Cramer
  • Process for the production of mouldings of crosslinked polymers
    Patent number: 5151480
    Abstract: The invention relates to a process for the production of mouldings of crosslinked polymers by processing (moulding) of uncrosslinked copolymers of vinyl compounds and polymerisable silane compounds having 1 to 3 hydrolysable groups to give the desired mouldings and crosslinking of the copolymers in the mouldings by aftertreatment of the mouldings with acidic or alkaline aqueous solutions.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: September 29, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Podszun, Michael Muller, Wilfried Cramer, Bodo Rehbold
  • Mixture of polyarylene sulphides, glass fibres and maleimides
    Patent number: 5137938
    Abstract: The invention relates to mixtures of polyarylene sulphides, maleimides, glass fibres and if appropriate other additives. The mixtures are distinguished by good mechanical properties.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: August 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Kohler, Wilfried Cramer, Hans-Joachim Traenckner, Harald Pielartzik, Wolfgang Wehnert, William C. Bushong, Wolfgang Jakob