Patents by Inventor Yoshikane Shinkuma

Yoshikane Shinkuma 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).

  • Methods for manufacturing performs for press molding and method for manufacturing optical elements
    Patent number: 8181486
    Abstract: In the method for manufacturing preforms for press molding, a glass melt gob is separated from glass melt flow flowing out of a pipe and the glass melt gob is molded into a preform for press molding on a glass gob casting mold. The method comprises a viscosity-increasing step to increase viscosity of the glass melt.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: May 22, 2012
    Assignee: Hoya Corporation
    Inventors: Masahiro Yoshida, Yoshikane Shinkuma, Katsumi Utsugi
  • Process for producing glass shaped material and process for producing optical element
    Patent number: 7992412
    Abstract: Disclosed are a process for producing a glass shaped material having high quality and high mass accuracy and a process for producing an optical element, which includes the preparation of a glass shaped material having high quality and high mass accuracy, the heating of said glass shaped material and the precision-press-molding thereof.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: August 9, 2011
    Assignee: Hoya Corporation
    Inventors: Masahiro Yoshida, Yoshikane Shinkuma, Xuelu Zou
  • Processes for the production of glass article
    Patent number: 7328594
    Abstract: A process for stably and efficiently producing quality glass articles such as preforms at high yields, and a process for producing an optical device from the preform obtained by the above process. In the process for producing a glass article, molten glass gobs having a predetermined weight each are poured, or molten glass drops having a predetermined weight each are dropped through a nozzle, into a boiling liquid having a boiling point lower than the class transition temperature of the glass constituting said glass article or a liquid which is temperature-adjusted beforehand so as to be caused to boil by the amount of heat of the glass, to form glass articles.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: February 12, 2008
    Assignee: Hoya Corporation
    Inventors: Akira Murakami, Katsumi Utsugi, Yoshinori Iguchi, Masahiro Yoshida, Yoshikane Shinkuma, Atsushi Watabe
  • Processes for the production of glass article and optical device
    Publication number: 20070251271
    Abstract: A process for stably and efficiently producing quality glass articles such as preforms at high yields, and a process for producing an optical device from the preform obtained by the above process. In the process for producing a glass article, molten glass gobs having a predetermined weight each are poured, or molten glass drops having a predetermined weight each are dropped through a nozzle, into a boiling liquid having a boiling point lower than the glass transition temperature of the glass constituting said glass article or a liquid which is temperature-adjusted beforehand so as to be caused to boil by the amount of heat of the glass, to form glass articles. In the process for producing an optical device, a preform obtained by the above process is softened by heating and precision-press-molded into the optical device.
    Type: Application
    Filed: June 15, 2007
    Publication date: November 1, 2007
    Applicant: HOYA CORPORATION
    Inventors: Akira Murakami, Katsumi Utsugi, Yoshinori Iguchi, Masahiro Yoshida, Yoshikane Shinkuma, Atsushi Watabe
  • Methods for manufacturing performs for press molding and method for manufacturing optical elements
    Publication number: 20060260361
    Abstract: In the method for manufacturing preforms for press molding, a glass melt gob is separated from glass melt flow flowing out of a pipe and the glass melt gob is molded into a preform for press molding on a glass gob casting mold. The method comprises a viscosity-increasing step to increase viscosity of the glass melt.
    Type: Application
    Filed: February 28, 2006
    Publication date: November 23, 2006
    Inventors: Masahiro Yoshida, Yoshikane Shinkuma, Katsumi Utsugi
  • Process for producing glass shaped material and process for producing optical element
    Publication number: 20040261454
    Abstract: Disclosed are a process for producing a glass shaped material having high quality and high mass accuracy and a process for producing an optical element, which includes the preparation of a glass shaped material having high quality and high mass accuracy, the heating of said glass shaped material and the precision-press-molding thereof.
    Type: Application
    Filed: June 23, 2004
    Publication date: December 30, 2004
    Applicant: Hoya Corporation
    Inventors: Masahiro Yoshida, Yoshikane Shinkuma, Xuelu Zou
  • Processes for the production of glass article and optical device
    Publication number: 20030131628
    Abstract: A process for stably and efficiently producing quality glass articles such as preforms at high yields, and a process for producing an optical device from the preform obtained by the above process.
    Type: Application
    Filed: December 12, 2002
    Publication date: July 17, 2003
    Inventors: Akira Murakami, Katsumi Utsugi, Yoshinori Iguchi, Masahiro Yoshida, Yoshikane Shinkuma, Atsushi Watabe