Patents Assigned to Bridgestone Corporaton
  • Particles for electro-rheological fluid
    Patent number: 6797202
    Abstract: The present invention can provide particles for electro-rheological fluid for providing a high electro-rheological effect over a wide temperature range at low electric power consumption, and having high strength and excellent durability, not being susceptible to break-up due to the load of stress. Particles for an electro-rheological fluid of the present invention comprise spherical carbonaceous particles, obtained substantially from a solvent and a condensation product of a methylene type bond of aromatic sulfonic acid or a salt thereof.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: September 28, 2004
    Assignees: Bridgestone Corporaton, Mitsui Mining Company, Limited
    Inventors: Shigeki Endo, Howard See, Tasuku Saito, Koji Sakata, Kenji Fukuda, Youichiro Hara, Tatsuo Umeno