Patents by Inventor Rina Yamanaka

Rina Yamanaka 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).

  • Process for producing aluminum magnesium titanate
    Patent number: 8383534
    Abstract: The invention is to provide a process capable of producing aluminium magnesium titanate having a small coefficient of thermal expansion at a firing temperature lower than 1500° C. The production process of the invention comprises maintaining a pre-mixture containing a titania source powder, an alumina source powder, a magnesia source powder and a silica source powder within a temperature range of from 1100° C. to 1350° C. for at least 3 hours, followed by heating up to a temperature not lower than 1400° C. and firing at the temperature. The silica source powder is preferably a powder of alkali feldspar. Aluminium magnesium titanate is prepared according to the production process of the invention, and the resulting aluminium magnesium titanate is ground to give an aluminium magnesium titanate powder.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: February 26, 2013
    Assignees: Sumitomo Chemical Company, Limited, E.I. du Pont de Nemours and Company
    Inventors: Tetsuro Tohma, Keiichiro Suzuki, Satoko Iwato, Rina Yamanaka
  • PROCESS FOR PRODUCING ALUMINUM MAGNESIUM TITANATE
    Publication number: 20110077143
    Abstract: The invention is to provide a process capable of producing aluminium magnesium titanate having a small coefficient of thermal expansion at a firing temperature lower than 1500° C. The production process of the invention comprises maintaining a pre-mixture containing a titania source powder, an alumina source powder, a magnesia source powder and a silica source powder within a temperature range of from 1100° C. to 1350° C. for at least 3 hours, followed by heating up to a temperature not lower than 1400° C. and firing at the temperature. The silica source powder is preferably a powder of alkali feldspar. Aluminium magnesium titanate is prepared according to the production process of the invention, and the resulting aluminium magnesium titanate is ground to give an aluminium magnesium titanate powder.
    Type: Application
    Filed: January 19, 2009
    Publication date: March 31, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Tetsuro Tohma, Keiichiro Suzuki, Satoko Iwato, Rina Yamanaka