Patents by Inventor Yasuhiko Sagawa

Yasuhiko Sagawa 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).

  • Process for producing a fibrous assembly
    Patent number: 4399084
    Abstract: The present invention provides a process for producing a fibrous assembly, which comprises extruding a melt of a fiber-forming polymer through a mesh spinneret, said spinneret including many closely arranged small openings and having an opening ratio (.alpha.), represented by the following formula, of at least about 10% ##EQU1## V.sub.a is the total apparent volume of the spinneret which is taken within a unit area of its mesh portion, and V.sub.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: August 16, 1983
    Assignee: Teijin Limited
    Inventors: Yasuhiko Sagawa, Susumu Norota, Tsutomu Kiriyama, Shingo Emi, Tadasi Imoto, Tetsuo Yamauchi