Patents by Inventor Tatsuhiro Nagamatsu

Tatsuhiro Nagamatsu 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: 6288168
    Abstract: There is provided a propylene based resin composition comprising: (i) about 70 to 90% by weight of a propylene block copolymer; and (ii) about 30 to 10% by weight of an ethylene based resin, wherein: (a) the relation between its die swelling ratio (SR1) at a shear rate of 6.08 sec−1 and its die swelling ratio (SR2) at a shear rate of 608 sec−1 satisfies the following formula (1); and (b) the relation among its Izod impact value (kJ/m2) at a temperature of 0° C., its flexural modulus (MPa) at a temperature of 23° C. and its haze value (%) satisfies the following formula (2) SR2/SR1≦about 1.10  (1) Izod impact value×Flexural modulus/Haze value≧about 200  (2).
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: September 11, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Seiji Shiromoto, Haruyuki Suzuki, Tatsuhiro Nagamatsu
  • Patent number: 6255237
    Abstract: There is provided a laminated sheet comprising: (i) a foamed sheet containing a polypropylene resin; and (ii) a non-woven fabric, wherein the foamed sheet has an expansion ratio, &khgr;, of from about 2 to 10, a cell diameter of not more than about 300 &mgr;m, and a thickness, h (cm), satisfying the following formula (1), (100/E(1−(1−1/&khgr;)⅔))⅓≦h≦2  (1) wherein E (kgf/cm2) is a modulus of elasticity in bending of the resin which is to be a constituent of the foamed sheet and is not yet foamed.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: July 3, 2001
    Assignee: Sumitomo Chemical Company Limited
    Inventors: Akinobu Sakamoto, Tatsuhiro Nagamatsu, Sakae Yamamoto
  • Patent number: 6110986
    Abstract: A propylene-based polymer composition obtained by polymerizing a propylene monomer in the presence of a stereoregular olefin polymerization catalyst system in the first stage to produce a crystalline propylene-based polymer(A) having an intrinsic viscosity of 5 dl/g or more, and successively polymerizing a propylene monomer in the second stage to produce a crystalline propylene-based polymer(B) with an intrinsic viscosity of less than 3 dl/g, wherein the content of the (A) is in the range of 0.05% by weight or more and less than 35% by weight in the total of the polymers(A) and (B), and the total of the polymers(A) and (B) has an intrinsic viscosity of less than 3 dl/g and a Mw/Mn of less than 10, and the foamed article thereof.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: August 29, 2000
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Nozawa, Kazuki Wakamatsu, Tatsuhiro Nagamatsu
  • Patent number: 5948832
    Abstract: Provided are a resin composition improved in utilization of active compound by controlling the bleeding of the active compound low in vaporizability and a molded product obtained from the resin composition. The resin composition comprises 100 parts by weight of a resin, 0.01-200 parts by weight of an active compound and 0.1-100 parts by weight of a vaporizable plasticizer having a vapor pressure of 0.001 mmHg or higher at 20.degree. C., and the vapor pressure (P1) of the vaporizable plasticizer at 20.degree. C. and the vapor pressure (P2) of the active compound at 20.degree. C. satisfy the formula: P1/P2.gtoreq.2.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: September 7, 1999
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tatsuhiro Nagamatsu, Hiroki Nakata, Takanori Kume, Tadashi Sakurai
  • Patent number: 5476652
    Abstract: Disclosed in this invention are the slow-releasing medicated resin moldings which are the porous bodies obtained by stretching 1.1-10 times the resin compositions comprising 100 parts by weight of a thermoplastic resin, 50 to 400 parts by weight of a filler and a drug(s) in an amount not less than the saturation dissolution rate for the thermoplastic resin, and a process for producing such slow-releasing medicated resin moldings.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: December 19, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takashi Chinuki, Tatsuhiro Nagamatsu, Tomomi Satoh