Patents by Inventor Junichirou Natori

Junichirou Natori 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).

  • Rubber composition containing cyclic polysulfide as vulcanization agent and pneumatic tire using the same
    Patent number: 7569639
    Abstract: A rubber composition containing 100 parts by weight a sulfur-vulcanizable rubber (A) and 0.1 to 30 parts by weight of a vulcanization agent of a cyclic polysulfide (B) having the formula (I): wherein R is a substituted or unsubstituted C2 to C20 alkylene group, substituted or unsubstituted C2 to C20 oxyalkylene group or alkylene group having an aromatic ring, n is an integer of 1 to 20, x is a number of 2 to 6 on average.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: August 4, 2009
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Wonmun Choi, Tomoyuki Matsumura, Naoya Amino, Kazuhiro Takase, Daisuke Kanenari, Takeshi Hotaka, Junichirou Natori
  • Rubber composition containing cyclic polysulfide as vulcanizer and pneumatic tire made therefrom
    Publication number: 20060094831
    Abstract: A rubber composition containing 100 parts by weight a sulfur-vulcanizable rubber (A) and 0.1 to 30 parts by weight of a vulcanization agent of a cyclic polysulfide (B) having the formula (I): wherein R is a substituted or uhsubstituted C2 to C20 alkylene group, substituted or unsubstituted C2 to C20 oxyalkylene group or alkylene group having an aromatic ring, n is an integer of 1 to 20, x is a number of 2 to 6 on average.
    Type: Application
    Filed: October 13, 2004
    Publication date: May 4, 2006
    Inventors: Wonmun Choi, Tomoyuki Matsumura, Naoya Amino, Kazuhiro Takase, Daisuke Kanenari, Takeshi Hotaka, Junichirou Natori