Patents by Inventor Hans-Joachim Plein

Hans-Joachim Plein 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).

  • Jeans fabric comprising open sheath core friction spun yarns and process for its manufacture
    Patent number: 4343334
    Abstract: A jeans fabric consists of polyester fibers and of cotton in which the filling yarn is a polyester yarn or a polyester fiber/cotton mixed yarn and in which the warp has been dyed and the filling has not been dyed. At least the warp consists of a sheath-core staple fiber yarn manufactured by the open end sheath-core friction spinning process. The polyester fibers are disposed predominantly in the core, the cotton in the sheath of the warp yarn. The jeans fabric combines good wear resistance with an attractive handle.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: August 10, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Christian Schulze, Hans-Joachim Plein