Patents by Inventor Rolf Heider

Rolf Heider 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).

  • False-twist-textured synthetic polymer filament yarn
    Patent number: 4330989
    Abstract: The invention is directed to filament yarns made from synthetic polymers and having false-twist texture, comprising a core filament group and a sheath filament group wrapped around and partially covering the core. The sheath filament group comprises at least two filament groups 4 and 5 with different cross-sections, the smaller component of the sheath filament group including fibrils with the coarsest denier, and the larger component of the sheath filament group containing fibrils with the finer fibril denier, the finer fibrils in the filament group having a lesser fibril denier than the fibrils 3 of the core group 1.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: May 25, 1982
    Assignee: Viscosuisse S.A.
    Inventors: Heinrich Schmieder, Rolf Heider