Patents by Inventor Mayumi Hamada

Mayumi Hamada 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).

  • Ink composition and printed article
    Patent number: 8592027
    Abstract: An ink composition which can be used to form an image having excellent metallic luster and excellent abrasion resistance is provided, and a printed article in which the image having excellent metallic luster and excellent abrasion resistance is formed is provided. Such an ink composition is ejected by an ink jet technique and contains silver particles, wax particles, and water. The wax particles are contained in an amount that is in the range from 0.02 to 1.5 weight %. Assuming that the average diameter of the silver particles is D1 [nm] and that the average diameter of the wax particles is D2 [nm], the relationship of 0.98?D2/D1?5.40 is satisfied.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: November 26, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Masakazu Ohashi, Mayumi Hamada
  • INK COMPOSITION AND PRINTED ARTICLE
    Publication number: 20120040156
    Abstract: An ink composition which can be used to form an image having excellent metallic luster and excellent abrasion resistance is provided, and a printed article in which the image having excellent metallic luster and excellent abrasion resistance is formed is provided. Such an ink composition is ejected by an ink jet technique and contains silver particles, wax particles, and water. The wax particles are contained in an amount that is in the range from 0.02 to 1.5 weight %. Assuming that the average diameter of the silver particles is D1 [nm] and that the average diameter of the wax particles is D2 [nm], the relationship of 0.98?D2/D1?5.40 is satisfied.
    Type: Application
    Filed: August 11, 2011
    Publication date: February 16, 2012
    Applicant: Seiko Epson Corporation
    Inventors: Masakazu Ohashi, Mayumi Hamada
  • Piezoelectric material and piezoelectric device
    Patent number: 7586234
    Abstract: A piezoelectric material is expressed by a general formula (1) as follows: (Bi1?xBax)(Fe1?xTix)O3 . . . (1), where x is greater than 0, but smaller than 1 (0<x<1).
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: September 8, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Hiromu Miyazawa, Mayumi Hamada
  • METHOD FOR MANUFACTURING PIEZOELECTRIC LAYERS
    Publication number: 20070271750
    Abstract: A method for manufacturing a piezoelectric layer includes the steps of: forming a material layer of a piezoelectric layer composed of potassium sodium niobate above a base substrate; introducing material gas containing water vapor and oxygen gas in an oxidizing gas forming section; and heating the material gas in the oxidizing gas forming section and supplying the material gas in an oxidation furnace to thereby oxidize the material layer.
    Type: Application
    Filed: May 25, 2007
    Publication date: November 29, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Mayumi HAMADA, Takeshi KIJIMA
  • PIEZOELECTRIC MATERIAL AND PIEZOELECTRIC DEVICE
    Publication number: 20070241642
    Abstract: A piezoelectric material is expressed by a general formula (1) as follows: (Bi1?xBax)(Fe1?xTix)O3 . . . (1), where x is greater than 0, but smaller than 1(0<x<1).
    Type: Application
    Filed: April 10, 2007
    Publication date: October 18, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hiromu Miyazawa, Mayumi Hamada