Patents by Inventor Detlef Frank

Detlef Frank 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).

  • LCP films having roughened surface and process therefor
    Patent number: 5843562
    Abstract: A film having a roughened surface. The film is made of an LCP and has surface recessions covering at least about 25% of the area of the surface. The film is made by pressing an embossing means against the film surface at a temperature about 15.degree.-75.degree. C. below the melting point of the polymer. The embossed film has improved resistance to abrasion.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: December 1, 1998
    Assignees: Hoechst Celanese Corporation, Kuraray Co. Ltd.
    Inventors: Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Randy Douglas Jester, Leonard R. Garrett, deceased, Detlef Frank
  • Process for treating liquid crystal polymer film
    Patent number: 5703202
    Abstract: A process for treating a liquid crystal polymer film which includes the steps of: heating a film obtained by extrusion molding of a liquid crystal polymer, while contacting at least one surface of the film with a supporting body, to melt the polymer; cooling the melted polymer to form a solidified polymer layer; and separating the solidified polymer layer from the supporting body. The process readily provides liquid crystal polymer films having excellent resistance to intra-layer delamination and high tensile strength and elongation, as well as excellent resistance to abrasion, dimensional stability when heated, and resistance to folding.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: December 30, 1997
    Assignees: Hoechst Celanese Corp, Kuraray Co. Ltd.
    Inventors: Randy Douglas Jester, John Arthur Penoyer, Douglas Duane Roth, Detlef Frank, Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Tohei Moritani
  • Process for treating liquid crystal polymer film
    Patent number: 5529740
    Abstract: A process for treating a liquid crystal polymer film which includes the steps of: heating a film obtained by extrusion molding of a liquid crystal polymer, while contacting at least one surface of the film with a supporting body, to melt the polymer; cooling the melted polymer to form a solidified polymer layer; and separating the solidified polymer layer from the supporting body. The process readily provides liquid crystal polymer films having excellent resistance to intra-layer delamination and high tensile strength and elongation, as well as excellent resistance to abrasion, dimensional stability when heated, and resistance to folding.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: June 25, 1996
    Inventors: Randy D. Jester, John A. Penoyer, Douglas D. Roth, Detlef Frank, Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Tohei Moritani
  • Sheet-like molding and process for its preparation
    Patent number: 5217762
    Abstract: A sheet-like molding made of a liquid-crystalline polymer which can be processed in the liquid-crystalline melt is described. It contains less than 1 .times.10.sup.-1, preferably less than 2 .times.10.sup.-2, flow irregularities per cm.sup.3.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: June 8, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Detlef Frank