Patents by Inventor Hiroaki Nishioi

Hiroaki Nishioi 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).

  • Microfibers-generating fibers and a woven or non-woven fabric of microfibers
    Patent number: 5290626
    Abstract: A web or a fibers consisting of microfibers having a fineness of 0.01 denier or less is provided, which web or fibers is obtained by spinning conjugate fibers consisting of microfibers-generating fibers of island-in-sea type, according to melt blown process, the sea component being a thermoplastic resin (polyvinyl alcohol) capable of being removed with a solvent (water) and the island component being a thermoplastic resin (polypropylene) insoluble in the solvent used for the sea component, followed by collecting the spun conjugate fibers in the form of a web or a tow; the resulting composite fibers being thinner than those obtained according to conventional conjugate spinning and the microfibers obtained by removing the sea component also being thinner than fibers obtained from conventional conjugate fibers of island-in-sea type.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: March 1, 1994
    Assignee: Chisso Corporation
    Inventors: Hiroaki Nishioi, Satoshi Ogata, Yoshimi Tsujiyama