Patents by Inventor Tomoaki Masubuchi

Tomoaki Masubuchi 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).

  • Sodium niobate powder, method for producing the same, method for producing ceramic, and piezoelectric element
    Patent number: 9231189
    Abstract: A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 ?m or more and 100 ?m or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoaki Masubuchi, Toshiaki Aiba, Toshihiro Ifuku, Makoto Kubota, Takayuki Watanabe, Tatsuo Furuta, Jumpei Hayashi
  • OPTICAL MEMBER, IMAGE PICKUP APPARATUS, AND METHOD FOR MANUFACTURING OPTICAL MEMBER
    Publication number: 20150138422
    Abstract: To provide an optical member in which crystallization is suppressed and which has a porous glass layer on a base material. An optical member has a base material 1 and a porous glass layer 2 which is formed on the base material 1 and has a three-dimensional through pore, in which the existence ratio of crystals of 0.2 micrometer or more in the porous glass layer 2 is 1.0% or lower.
    Type: Application
    Filed: April 24, 2013
    Publication date: May 21, 2015
    Inventors: Akira Sugiyama, Zuyi Zhang, Yoshinori Kotani, Akiko Takei, Norishige Kakegawa, Kenji Takashima, Naoyuki Koketsu, Tomoaki Masubuchi
  • SODIUM NIOBATE POWDER, METHOD FOR PRODUCING THE SAME, METHOD FOR PRODUCING CERAMIC, AND PIEZOELECTRIC ELEMENT
    Publication number: 20150062257
    Abstract: A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 ?m or more and 100 ?m or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C.
    Type: Application
    Filed: April 3, 2013
    Publication date: March 5, 2015
    Inventors: Tomoaki Masubuchi, Toshiaki Aiba, Toshihiro Ifuku, Makoto Kubota, Takayuki Watanabe, Tatsuo Furuta, Jumpei Hayashi