Patents by Inventor Hiroyasu Noma

Hiroyasu Noma 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).

  • Materials for living hard tissue replacements
    Patent number: 5356436
    Abstract: The materials for living hard tissue replacements of the present invention comprise a ceramic material which contain Cao and SiO.sub.2 as essential components, and MgO as an optional components, are substantially free from calcium phosphate and are capable of forming a compound based on calcium phosphate by contact with an aqueous solution containing phosphorus, and show high biological affinity.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: October 18, 1994
    Assignee: TDK Corporation
    Inventors: Tohru Nonami, Hiroyasu Noma, Shinya Nakajima
  • Materials for living hard tissue replacements
    Patent number: 5344456
    Abstract: The materials for living hard tissue replacements of the present invention comprise a ceramic material which contain Cao and SiO.sub.2 as essential components, and MgO as an optional components, are substantially free from calcium phosphate and are capable of forming a compound based on calcium phosphate by contact with an aqueous solution containing phosphorus, and show high biological affinity.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: September 6, 1994
    Assignee: TDK Corporation
    Inventors: Tohru Nonami, Hiroyasu Noma, Shinya Nakajima
  • Prosthetic body for bone substitute and a method for the preparation thereof
    Patent number: 4846838
    Abstract: The inventive prosthetic body for bone substitute is a sintered body of hydroxyapatite and characterized by the open pore structure with a pore diameter in a specified range forming a porosity of 20 to 40% and a bending strength of at least 100 kg/cm.sup.2. The sintered body can be prepared by blending powders of hydroxyapatite and a thermally decomposable substance, e.g. crystalline cellulose, each having a specified particle size distribution, in a specified proportion and shaping and sintering the powder blend.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: July 11, 1989
    Assignee: TDK Corporation
    Inventors: Nobuharu Takai, Hiroyasu Noma, Shoichi Wakabayashi, Susumu Takata
  • Porous hydroxyapatite material for artificial bone substitute
    Patent number: 4629464
    Abstract: The sintered microporous hydroxyapatite material of the invention is useful as an artificial bone substitute material either in a granular and slurried from in a physiological saline solution used as a filling material for lost portions or cavities of bones or in a form of a shaped prosthetic bone substitute member. The inventive material is characteristic in the open pore structure of micropores with a pore diameter distribution in the range from 0.01 to 0.10 mm and a porosity in the range from 20 to 50%. When the material is used in the form of a granular bone filling, the particle diameter thereof should be in the range from 0.1 to 2.0 mm. When the material is used as the prosthetic bone substitute member, the shaped body should be formed of the matrix of the inventive microporous material and pores with a pore diameter distribution in the range from 0.2 to 2.0 mm.
    Type: Grant
    Filed: August 29, 1985
    Date of Patent: December 16, 1986
    Assignee: TDK Corporation
    Inventors: Susumu Takata, Shoichi Wakabayashi, Hiroyasu Noma, Tatsuya Wakatsuki