Patents by Inventor Ritsuko Yamada

Ritsuko Yamada 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
    Patent number: 7393899
    Abstract: As a rubber composition having an elasticity further increased as compared with the conventional rubber composition while preventing the lowering of the fracture resistance, there is provided a rubber composition comprising a rubber component of at least one of natural rubber and synthetic diene rubbers and a phenolic resin compounded therein and represented by the following formula (I): (wherein R0 is a hydrogen atom, an alkyl group, a phenyl group or a methylol group, and each of R1 and R2 is an arylene group, an alkylene group having a carbon number of 2-10, an aralkylene group, a cycloalkenylene group or a cycloalkadienylene group, and n is 0-10).
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: July 1, 2008
    Assignee: Bridgestone Corporation
    Inventor: Ritsuko Yamada
  • Rubber composition
    Publication number: 20050272869
    Abstract: As a rubber composition having an elasticity further increased as compared with the conventional rubber composition while preventing the lowering of the fracture resistance, there is provided a rubber composition comprising a rubber component of at least one of natural rubber and synthetic diene rubbers and a phenolic resin compounded therein and represented by the following formula (I): (wherein R0 is a hydrogen atom, an alkyl group, a phenyl group or a methylol group, and each of R1 and R2 is an arylene group, an alkylene group having a carbon number of 2-10, an aralkylene group, a cycloalkenylene group or a cycloalkadienylene group, and n is 0-10).
    Type: Application
    Filed: October 7, 2003
    Publication date: December 8, 2005
    Inventor: Ritsuko Yamada