Patents by Inventor Ryutaro Shirayanagi

Ryutaro Shirayanagi 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).

  • Patent number: 5366792
    Abstract: A laminated non-woven fabric comprising a laminated material of an intermediate layer of a melt-blown non-woven fabric obtained by melt-blowing an olefin-type resin, an inner and outer layers of a spun-bonded non-woven fabric which chiefly consists of polyester-type fibers and in which the fibers are bonded together locally and at a coarse density, wherein the fibers constituting the inner and outer layers are inserted in the melt-blown non-woven fabric and are intermingled with fibers in the melt-blown non-woven fabric or in the spun-bonded non-woven fabrics of the opposite sides, so that the layers are coupled together as a unitary structure, and a process for producing the same.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: November 22, 1994
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Ryutaro Shirayanagi, Masaki Shimizu, Masami Shimokawa
  • Patent number: 5306545
    Abstract: The invention provides a melt-blown non-woven fabric obtained by melt-blowing an ethylene-.alpha.-olefin copolymer having a density of smaller than 0.900 g/cm.sup.3 and a crystallinity of from 5 to 40% or by melt-blowing a resin composition which chiefly comprises said copolymer, a laminated non-woven fabric obtained by laminating as a unitary structure a dry-type non-woven fabric on the melt-blown fabric that is obtained by melt-blowing said copolymer or the resin composition which chiefly comprises said copolymer, and a cataplasm which comprises the non-woven fabric obtained by melt-blowing said copolymer or said resin composition which chiefly comprises said copolymer, a dry-type non-woven fabric laminated on said melt-blown non-woven fabric, and a medicine layer applied onto said dry-type non-woven fabric. The non-woven fabric or the laminated non-woven fabric has excellent elastic property, i.e.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: April 26, 1994
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Ryutaro Shirayanagi, Akimi Saeki, Kazuhiro Masumoto, Masaki Shimizu