Patents by Inventor Masahiro Hosoi

Masahiro Hosoi 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).

  • Extrusion-molded article having good thermal stability
    Patent number: 3963844
    Abstract: A thermally stable extrusion-molded article characterized by (1) consisting of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units, (2) having a density not in excess of 1.318, and (3) being in the unstretched state.This article is prepared by extruding a melt of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units into the form of a molded structure, and cooling the extruded molded structure to room temperature, wherein during the period in which the extruded molded structure is cooled from at least 75%C. to room temperature, the cooling of the molded structure is performed rapidly so that the density of the molded structure does not exceed 1.318.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: June 15, 1976
    Assignee: Teijin Limited
    Inventors: Sakae Shimotsuma, Masahiro Hosoi, Takatoshi Kuratsuji, Shoji Kawase, Takeo Shima
  • Process for preparing polyester shaped articles
    Patent number: 3961008
    Abstract: A process for preparing a shaped article by melt-extruding a polyester containing tetramethylene naphthalene-2,6-dicarboxylate or hexamethylene naphthalene-2,6-dicarboxylate as a main recurring unit, wherein the extrudate is exposed to a temperature of 75.degree. to 450.degree.C. for 1 to 180 seconds immediately after extrusion.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: June 1, 1976
    Assignee: Teijin Limited
    Inventors: Takatoshi Kuratsuji, Shoji Kawase, Takeo Shima, Sakae Shimotsuma, Masahiro Hosoi
  • Electrically insulating material
    Patent number: 3952125
    Abstract: An electrically insulating material composed of an unstretched film of a substantially linear polyester at least 85 mol% of the recurring units of which consist of a hexamethylene naphthalene-2,6-dicarboxylate unit and which has an intrinsic viscosity, as measured on its ortho-chlorophenol solution at 35.degree.C., of at least 0.3.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: April 20, 1976
    Assignee: Teijin Limited
    Inventors: Takatoshi Kuratsuji, Hiroo Shima, Takeo Shima, Shoji Kawase, Sakae Shimotsuma, Masahiro Hosoi
  • Biaxially oriented polyethylene-2,6-naphthalate film containing another polyester resin and process for its production
    Patent number: 3937754
    Abstract: A biaxially oriented polyethylene-2,6-naphthalate film, which comprises a blended mixture of1. a polyethylene-2,6-naphthalate resin which may contain a unit derived from not more than 10mol% of a polyester-forming component other than a polyethylene-2,6-naphthalate-forming component, and2. 0.5 to 10% by weight, based on the polyethylene-2,6-naphthalate resin (1), of a polyester resin other than the polyethylene-2,6-naphthalate resin (1) in which the amount of the homopolyester unit is at least 90 mol%,Said film having a softing point at least 1.degree.C. higher than the its equilibrium softening point, and a process for its production.
    Type: Grant
    Filed: July 23, 1973
    Date of Patent: February 10, 1976
    Assignee: Teijin Ltd
    Inventors: Sakae Shimotsuma, Takeo Asai, Masahiro Hosoi, Hiroshi Aoki, Masanori Masuda