Patents by Inventor Osamu Tohya

Osamu Tohya 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 of shaping a vessel having a multilayered wall structure
    Patent number: 5683645
    Abstract: A laminated resin sheet consisting of (a) at least one layer of an ethylene-vinyl alcohol copolymeric resin (EVOH resin), (b) at least one layer of a hot-melt adhesive resin and (c) at least one layer of a polystrene-based resin, the layer (b) being interposed between the layers (a) and (c) to serve to adhesively bond them together. The laminated sheet has excellent moldability only when the EVOH resin has a thermal characteristic specified in terms of the integrated value of the peak areas in a diagram obtained by the DSC (differential scanning calorimetry) measurement in the course of temperature elevation. The sheet may be formed into a vessel having a multilayered wall structure by hot molding.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: November 4, 1997
    Assignee: Idemitsu Petrochemical Company Limited
    Inventors: Masahiro Akamatsu, Osamu Tohya, Tohru Yukumoto
  • Multilayered structural body
    Patent number: 5352536
    Abstract: Disclosed is a laminated resin sheet consisting of (a) at least one layer of an ethylene-vinyl alcohol copolymeric resin (EVOH resin), (b) at least one layer of a hot-melt adhesive resin and (c) at least one layer of a polystyrene-based resin, the layer (b) being interposed between the layers (a) and (c) to serve to adhesively bond them together. The laminated sheet has excellent moldability only when the EVOH resin has a thermal characteristic specified in terms of the integrated value of the peak areas in a diagram obtained by the DSC (differential scanning calorimetry) measurement in the course of temperature elevation.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: October 4, 1994
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Masahiro Akamatsu, Osamu Tohya, Tohru Yukumoto