Patents by Inventor Jun Ichnose

Jun Ichnose 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 a glass optical element
    Patent number: 6334335
    Abstract: A method for forming a glass optical element by press forming a thermally softened glass material with a preheated forming mold composed of an upper and a lower die. The glass material, the upper die and the lower die are heated within respectively prescribed temperature ranges, the preheating temperature of the upper die being below the preheating temperature of the lower die. The thermally softened glass material is pressed in the preheated forming mold, and the forming surfaces of the upper and the lower dies are cooled simultaneously with the start of the initial pressing, during the process of the initial pressing, or after the completion of the initial pressing.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: January 1, 2002
    Assignee: Hoya Corporation
    Inventors: Shin-Ichiro Hirota, Jun Ichnose, Hiroshi Enomoto