Patents by Inventor Hiroshige Sugiyama

Hiroshige Sugiyama 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 for preparing polyethylene articles of high tensile strength and modulus and low creep and articles thus obtained
    Patent number: 5128415
    Abstract: Polethylene articles having a high tensile strength above 2.0 GPa, a modulus above 70 GPa and a creep below 3.times.10.sup.-7 sec.sup.-1 are obtained via thermoreversible gelation of a solution of polyethylene with a Mv above 5.times.10.sup.5 kg/kmole, followed by ultradrawing. As polyethylene a copolymer or a blend is used containing 2-20 lower alkyl side chains per 1000 carbon atoms.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: July 7, 1992
    Assignee: Dyneema V.O.F.
    Inventors: Cornelis W. M. Bastiaansen, Yasuo Ohta, Hiroshige Sugiyama
  • Synthetic fibers having down/feather-like characteristics and suitable for wadding
    Patent number: 4364996
    Abstract: A synthetic fiber for wadding which has a plurality of projections in its cross section and a section deformation ratio (S) of not less than 5000/.sqroot.D (wherein D is a monofiber denier) and which has the following physical characteristics:Monofiber denier (D, denier): 0.1 to 3;Coefficient of inter-fiber static friction (.mu..sub.s): not more than 0.14;Crimp number (CN, number/25 mm): 4 to 14;Ratio of crimp index and crimp number (Ci(%)/CN): 0.6 to 1.8;H.sub.0.2 (cm): not less than 7.3;H.sub.0.2 /H.sub.25 (cm/cm): not less than 6.5;.delta..sub.D (g/cm.sup.2 /cm): not more than 0.4.
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: December 21, 1982
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventor: Hiroshige Sugiyama
  • Polyester fiber having anti-pilling property and its production
    Patent number: 4071502
    Abstract: An anti-pilling polyester fiber having an intrinsic viscosity of 0.32 to 0.48 which has the following physical properties: tenacity, 3.5 to 5.0 g/d; knot tenacity, not more than 3.0 g/d; ratio of tenacity and knot tenacity, not less than 1.5.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: January 31, 1978
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hiroshige Sugiyama, Hiroshi Yasuda