Patents by Inventor Ayako Shindo

Ayako Shindo 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).

  • Negative thermal expansion glass ceramic
    Patent number: 6521556
    Abstract: A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of −40° C. to +160° C. and a method for producing the same are provided. The negative thermal expansion glass ceramic has a coefficient of thermal expansion of −25 to −100×10−7/° C. in the temperature range of −40° C. to +160° C., and comprises main crystalline phases which are one or more types selected from a group consisting of &bgr;-eucryptite solid solution (&bgr;-Li2O·Al2O3·2SiO2 solid solution), &bgr;-eucryptite (&bgr;-Li2O·Al2O3·2SiO2), &bgr;-quartz solid solution (&bgr;-SiO2 solid solution), and &bgr;-quartz (&bgr;-SiO2), wherein a total amount of crystals of the main crystalline phases can be 70 to 100% in mass percent.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: February 18, 2003
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Ayako Shindo, Naoyuki Goto
  • Negative thermal expansion glass ceramic and method for producing the same
    Patent number: 6506699
    Abstract: A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of −40° C. to +160° C. and a method for producing the same are provided. The negative thermal expansion glass ceramic has a coefficient of thermal expansion of −25 to −100×10−7/° C. in the temperature range of −40° C. to +160° C., and comprises main crystalline phases which are one or more types selected from a group consisting of &bgr;-eucryptite solid solution (&bgr;-Li2O.Al2O3.2SiO2 solid solution), &bgr;-eucryptite (&bgr;-Li2O.Al2O3.2SiO2), &bgr;-quartz solid solution (&bgr;-SiO2 solid solution), and &bgr;-quartz (&bgr;-SiO2), wherein a total amount of crystals of the main crystalline phases can be 70 to 100% in mass percent.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: January 14, 2003
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Ayako Shindo, Naoyuki Goto
  • Glass ceramic and temperature compensating member
    Patent number: 6492288
    Abstract: A glass ceramic comprises a main crystal phase which comprises at least one selected from a group consisting of &bgr;-eucryptite (&bgr;-Li2O.Al2O3.2SiO2), &bgr;-eucryptite solid solution (&bgr;-Li2O.Al2O3.2SiO2 solid solution), &bgr;-quartz (&bgr;-SiO2), and &bgr;-quartz solid solution (&bgr;-SiO2 solid solution), wherein an average grain size of the main crystal phase is less than 5 &mgr;m, and a coefficient of thermal expansion thereof is −30×10−7 to −90×10−7/° C. in a temperature range of −40° C. to +160° C., and a hysteresis of the coefficient of thermal expansion is not more than 20 ppm.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: December 10, 2002
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Ayako Shindo
  • Glass ceramic and temperature compensating member
    Publication number: 20020058578
    Abstract: A glass ceramic comprises a main crystal phase which comprises at least one selected from a group consisting of &bgr;-eucryptite (&bgr;-Li2O.Al2O3.2SiO2), &bgr;-eucryptite solid solution (&bgr;-Li2O.Al2O3.2SiO2 solid solution), &bgr;-quartz (&bgr;-SiO2), and &bgr;-quartz solid solution (&bgr;-SiO2 solid solution), wherein an average grain size of the main crystal phase is less than 5 &mgr;m, and a coefficient of thermal expansion thereof is −30×10−7 to −90×10−7/° C. in a temperature range of −40° C. to +160° C., and a hysteresis of the coefficient of thermal expansion is not more than 20 ppm.
    Type: Application
    Filed: November 29, 2000
    Publication date: May 16, 2002
    Applicant: Kabushiki Kaisha Ohara
    Inventor: Ayako Shindo
  • Negative thermal expansion glass ceramic
    Publication number: 20020045527
    Abstract: A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of −40° C. to +160° C. and a method for producing the same are provided. The negative thermal expansion glass ceramic has a coefficient of thermal expansion of −25 to −100×10−7/° C. in the temperature range of −40° C. to +160° C., and comprises main crystalline phases which are one or more types selected from a group consisting of &bgr;-eucryptite solid solution (&bgr;-Li2O.Al2O3.2SiO2 solid solution), &bgr;-eucryptite (&bgr;-Li2O.Al2O3.2SiO2), &bgr;-quartz solid solution (&bgr;SiO2 solid solution), and &bgr;-quartz (&bgr;-SiO2), wherein a total amount of crystals of the main crystalline phases can be 70 to 100% in mass percent.
    Type: Application
    Filed: October 11, 2001
    Publication date: April 18, 2002
    Applicant: KABUSHIKI KAISHA OHARA
    Inventors: Ayako Shindo, Naoyuki Goto