Patents by Inventor Tadahiro Mino

Tadahiro Mino 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).

  • Zirconia-based sinter, process for producing the same, gringing part material, and bracket material for dental correction
    Patent number: 5656564
    Abstract: A zirconia-based sinter containing a boron compound and stabilized with a rare earth metal oxide is provided which has excellent fracture toughness, mechanical strength and thermal stability. A zirconia-based sinter comprising ZrO.sub.2 as the main component, one or more rare earth metal oxides, R.sub.2 O.sub.3, selected from Yb.sub.2 O.sub.3, Er.sub.2 O.sub.3, Ho.sub.2 O.sub.3, Y.sub.2 O.sub.3, and Dy.sub.2 O.sub.3, and a boron compound or a boron compound and Al.sub.2 O.sub.3 and/or SiO.sub.2, wherein the molar proportion of R.sub.2 O.sub.3 /ZrO.sub.2 is from 1.3/98.7 to 2/98, excluding 2/98, and the content of boron components is from 0.05 to 8% by mole in terms of B.sub.2 O.sub.3 or in addition thereto the content of Al.sub.2 O.sub.3 is from 0.1 to 5% by mole and/or the content of SiO.sub.2 is from 0.05 to 1.5% by mole. A grinding part material and a bracket material for dental correction constituted of the zirconia-based sinter are provided.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: August 12, 1997
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Susumu Nakayama, Terumitsu Ichimori, Tadahiro Mino, Nobuo Ayuzawa