Patents by Inventor Frederic Zapf

Frederic Zapf 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).

  • Patent number: 6434305
    Abstract: An optical transmission element (BL1, BL2) shows at least two optical fiber sub-units (BL1, BL2) which are combined by means of a common plastic covering (BSA). To the plastic covering (BS1, BS2) of the respective optical fiber sub-unit (BL1, BL2) at least one binding agent (HM1, HM2) is applied which causes the adhesion of the plastic matrix of the common second covering (BSA) of the optical transmission element (BL12) to the respective plastic matrix of the coverings (BS1, BS2) of the at least two optical fiber sub-units (BL1, BL2).
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: August 13, 2002
    Assignee: Corning Cable Systems LLC
    Inventors: Gregory A. Lochkovic, Siegfried Unterberger, Frederic Zapf
  • Patent number: 5993896
    Abstract: When enveloping an electrical or an optical conductor, the method applies a radiation-reactive resin having photoinitiators with an absorption maximum onto the conductor and then the resin is cured by subjecting it to a radiation of a wavelength preferably in the wavelength range for the absorption maximum of the photoinitiators. The apparatus for enveloping includes an arrangement for applying the resin followed by a radiation source for applying the radiation of the desired wavelength that falls into the range of the absorption maximum of the photoinitiators of the resin.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: November 30, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventors: Siegfried Unterberger, Frederic Zapf
  • Patent number: 5762847
    Abstract: An improved optical cable having at least one light waveguide having a coating and other component parts in the form of protective sheaths of plastic material as well as potentially tensile elements and filling compounds. The improved cable being recyclable, since the other component parts contain only polyolefins and small amounts of glass or inorganic fillers, so that the cable can easily be recycled into pellets having the inorganic fillers and glass acting as reinforcing elements.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Kamps, Walter Pfandl, Frederic Zapf, Reiner Schneider
  • Patent number: 4929051
    Abstract: The present invention is directed to an optical glass fiber with a primary coating of organo-polysiloxanes containing acrylic acid ester groups which coating is inter alia hydrolysis stable and rapidly curable.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Rogler, Christian Weitemeyer, Dietmar Wewers, Frederic Zapf, Bernhard Stapp