Patents by Inventor Yumi Mukai

Yumi Mukai 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).

  • Method of manufacturing glass substrate and information recording medium
    Patent number: 8722138
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: May 13, 2014
    Assignee: Hoya Corporation
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • METHOD OF MANUFACTURING GLASS SUBSTRATE AND INFORMATION RECORDING MEDIUM
    Publication number: 20130213091
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Application
    Filed: March 18, 2013
    Publication date: August 22, 2013
    Inventors: Hiroaki IKEDA, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • Method of manufacturing glass substrate and information recording medium
    Patent number: 8420154
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: April 16, 2013
    Assignee: Hoya Corporation
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • METHOD OF MANUFACTURING GLASS SUBSTRATE AND INFORMATION RECORDING MEDIUM
    Publication number: 20110059229
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Applicant: HOYA CORPORATION
    Inventors: Hiroaki IKEDA, Masaru SUZUKI, Kazuna SASAKI, Yumi MUKAI, Jun OZAWA
  • Method of manufacturing glass substrate and information recording medium
    Patent number: 7841210
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: November 30, 2010
    Assignee: Hoya Corporation
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • METHOD OF MANUFACTURING GLASS SUBSTRATE FOR USE IN INFORMATION RECORDING MEDIUM, AND METHOD OF MANUFACTURING INFORMATION RECORDING MEDIUM
    Publication number: 20080087045
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 17, 2008
    Inventors: Hiroaki IKEDA, Masaru SUZUKI, Kazuna SASAKI, Yumi MUKAI, Jun OZAWA
  • Method of manufacturing glass substrate and method of manufacturing information recording medium
    Patent number: 7281394
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: October 16, 2007
    Assignee: Hoya Corporation
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • Method of manufacturing glass substrate for use in information recording medium, and method of manufacturing information recording medium
    Publication number: 20030121284
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Application
    Filed: January 8, 2003
    Publication date: July 3, 2003
    Applicant: HOYA CORPORATION
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa
  • Method of manufacturing glass substrate for use in information recording medium, and method of manufacturing information recording medium
    Patent number: 6523367
    Abstract: In a method of manufacturing a glass substrate for an information recording medium including a step for chemically strengthening the glass substrate by contacting the glass substrate with chemical strengthening processing liquid containing chemical strengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical strengthening salt, respectively. The concentration may be detected by the use of an ICP (Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescent X-ray spectroscopy analyzing method.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: February 25, 2003
    Assignee: Hoya Corporation
    Inventors: Hiroaki Ikeda, Masaru Suzuki, Kazuna Sasaki, Yumi Mukai, Jun Ozawa