Patents by Inventor Ryuzo Ishigaki

Ryuzo Ishigaki 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: 5786056
    Abstract: A liquid absorbent material used in a pouch for a stoma comprising a laminate sheet having surface layers formed of water soluble or dispersible paper and an intermediate layer formed of a web comprising a mixture of a fibrous cellulosic absorbent resin and a powdery synthetic polymeric absorbent resin, wherein a plurality of linear recesses are arranged at such a pitch that the laminate sheet is easily tearable into each of fine sticks that can be inserted, for example, from a urine discharging tube into a stoma pouch for a urinary tract stoma.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: July 28, 1998
    Inventors: Keiji Komine, Ryuzo Ishigaki
  • Patent number: 5074962
    Abstract: A process for preparing a confidential postcard contains dehydrating a starting paper material containing 25 to 45% by weight of fibers of a thermoplastic resin and 55 to 75% by weight of fibers of a natural plant to thereby form a paper layer, heating, during or after drying, the paper layer at a temperature not lower than a softening point of the thermoplastic resin fibers to thereby obtain a paper sheet in which the fibers of the thermoplastic resin retain fiber shape and are entangled with the fibers of the natural plant, inscribing a statement to be kept confidential on the paper sheet, superposing the paper sheet to conceal the statement and attaching provisionally the superposed paper sheet by heating under pressure at a temperature not lower than a softening point of the thermoplastic resin fibers to obtain the confidential postcard. The confidential postcard is capable of being peeled off with the statement on the paper sheet being left intact.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: December 24, 1991
    Assignees: Japan Pulp and Paper Co. Ltd., Miki Tokushu Paper Mfg. Co., Ltd., ECS-88 Co., Ltd.
    Inventors: Ryuzo Ishigaki, Teluhisa Miki