Patents by Inventor Heribert Weisenfeld

Heribert Weisenfeld 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).

  • Composite pipe having a PTFE inner layer and a covering layer of a fiber-reinforced plastics material
    Patent number: 6758245
    Abstract: A composite pipe includes a polytetrafluoroethylene (PTFE) inner layer and a covering layer of fiber-reinforced plastics material which are joined to one another by force-locking and form-locking through an intermediate layer. The intermediate layer is formed of a PFA layer and a layer of glass or carbon fibers, in order to improve adhesive and shear strength between the PTFE inner layer and the covering layer. The PFA layer is adjacent the PTFE inner layer and the layer of glass or carbon fibers is adjacent the covering layer of fiber-reinforced plastics material.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: July 6, 2004
    Assignee: SGL Carbon AG
    Inventors: Ralf Troschitz, Willibald Schmidt, Heribert Weisenfeld
  • Composite pipe having a PTFE inner layer and a covering layer of a fiber-reinforced plastics material
    Publication number: 20030140978
    Abstract: A composite pipe includes a polytetrafluoroethylene (PTFE) inner layer and a covering layer of fiber-reinforced plastics material which are joined to one another by force-locking and form-locking through an intermediate layer. The intermediate layer is formed of a PFA layer and a layer of glass or carbon fibers, in order to improve adhesive and shear strength between the PTFE inner layer and the covering layer. The PFA layer is adjacent the PTFE inner layer and the layer of glass or carbon fibers is adjacent the covering layer of fiber-reinforced plastics material.
    Type: Application
    Filed: January 23, 2003
    Publication date: July 31, 2003
    Inventors: Ralf Troschitz, Willibald Schmidt, Heribert Weisenfeld