Patents by Inventor Masako Iwamoto

Masako Iwamoto 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: 8809450
    Abstract: The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: August 19, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Toshiaki Sakaki, Naoya Ichikawa, Masako Iwamoto
  • Patent number: 8633275
    Abstract: The present invention provides a rubber composition for a breaker, which achieves both good fuel economy and good breaking performance while simultaneously having excellent processability, and a pneumatic tire including a breaker produced using the rubber composition. The present invention relates to a rubber composition for a breaker, including: a rubber component that contains a modified natural rubber, the rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the rubber composition contains 5% by mass or more of the modified natural rubber based on 100% by mass of the rubber component.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: January 21, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Toshiaki Sakaki, Naoya Ichikawa, Masako Iwamoto
  • Publication number: 20120184671
    Abstract: The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.
    Type: Application
    Filed: January 13, 2012
    Publication date: July 19, 2012
    Inventors: Toshiaki Sakaki, Naoya Ichikawa, Masako Iwamoto
  • Publication number: 20110294949
    Abstract: The present invention provides a rubber composition for a breaker, which achieves both good fuel economy and good breaking performance while simultaneously having excellent processability, and a pneumatic tire including a breaker produced using the rubber composition. The present invention relates to a rubber composition for a breaker, including: a rubber component that contains a modified natural rubber, the rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the rubber composition contains 5% by mass or more of the modified natural rubber based on 100% by mass of the rubber component.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 1, 2011
    Inventors: Toshiaki Sakaki, Naoya Ichikawa, Masako Iwamoto
  • Patent number: 6551705
    Abstract: The present invention is directed to chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight to less than the total chitosan content. The antimicrobial activity of the chitosan-containing acrylic fibers of the present invention can persist for a long period of time and is not deteriorated even when subjected to posttreatments, such as dyeing and bleaching of fibers, and treatments in usual service environments of fiber products, such as washing and ironing.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: April 22, 2003
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroaki Ohnishi, Yoshihiro Nishihara, Hiroshi Hosokawa, Seizo Oishi, Masako Iwamoto, Yasuyuki Fujii, Hajime Itoh, Naoto Ohsuga, Gary J. Capone, Charles W. Emerson
  • Patent number: 6524508
    Abstract: The present invention is directed to chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight to less than the total chitosan content. The antimicrobial activity of the chitosan-containing acrylic fibers of the present invention can persist for a long period of time and is not deteriorated even when subjected to posttreatments, such as dyeing and bleaching of fibers, and treatments in usual service environments of fiber products, such as washing and ironing.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: February 25, 2003
    Assignees: Mitsubishi Rayon Co., Ltd., Solutia Inc.
    Inventors: Hiroaki Ohnishi, Yoshihiro Nishihara, Hiroshi Hosokawa, Seizo Oishi, Masako Iwamoto, Yasuyuki Fujii, Hajime Itoh, Naoto Ohsuga, Gary J. Capone, Charles W. Emerson
  • Patent number: 5823296
    Abstract: An apparatus for serving and displaying food including a continuous watercourse. Patrons sit around a periphery of the watercourse and food carriers circulate in the watercourse and carry various types of food. The food carriers are structurally independent from one another so that each food carriers is independently removable from the the watercourse. The food carriers also have a bumper sized to maintain a predetermined spacing between the food carriers in the watercourse.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 20, 1998
    Inventors: Yukio Iwamoto, Masako Iwamoto
  • Patent number: 5813497
    Abstract: An apparatus (2) for serving and displaying food including a continuous watercourse (4) with food carriers (8) carrying various food trays. Patrons sit around a periphery of the watercourse. The food carriers are removably attached to an endless line (10) underneath the water by flexible wires (30) so that each food carrier is independently removable from the said watercourse. In addition, the flexible wires are positioned along the endless line so as to maintain a predetermined spacing between the food carriers in the watercourse. This predetermined spacing gives the patron adequate time to select sushi from adjacent food carriers and also gives the sushi chef adequate time to add sushi to adjacent food carriers.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: September 29, 1998
    Inventors: Yukio Iwamoto, Masako Iwamoto
  • Patent number: 5730251
    Abstract: An apparatus (50) for serving and displaying food including a continuous watercourse (54). Patrons sit around a periphery of the watercourse. Food carriers (58) circulate in the watercourse and carry various food trays. The food carriers are structurally independent from one another so that each food carriers is independently removable from the said watercourse. The apparatus further includes structurally independent spacer members (60) positioned between the food carriers along the watercourse. The spacer members are sized to maintain a predetermined spacing between the food carriers in the watercourse.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: March 24, 1998
    Inventors: Yukio Iwamoto, Masako Iwamoto
  • Patent number: 5566782
    Abstract: An apparatus for serving and displaying food including a continuous watercourse. Patrons sit around a periphery of the watercourse and food carriers circulate in the watercourse and carry various types of food. The food carriers are structurally independent from one another so that each food carriers is independently removable from the watercourse. The food carriers also have a bumper sized to maintain a predetermined spacing between the food carriers in the watercourse.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 22, 1996
    Inventors: Yukio Iwamoto, Masako Iwamoto
  • Patent number: 5474153
    Abstract: An apparatus for serving and displaying food including a continuous watercourse. Patrons sit around a periphery of the watercourse and food carriers circulate in the watercourse and carry various types of food. The food carriers are structurally independent from one another so that each food carriers is independently removable from the said watercourse. The food carriers also have a bumper sized to maintain a predetermined spacing between the food carriers in the watercourse.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: December 12, 1995
    Inventors: Yukio Iwamoto, Masako Iwamoto