Patents by Inventor Kenji Kamo

Kenji Kamo 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).

  • High-purity, opaque quartz glass, method for producing same and use thereof
    Patent number: 5585173
    Abstract: The high-purity, opaque quartz glass containing 3.times.10.sup.6 -9.times.10.sup.6 of closed cells having an average size of 20-40 .mu.m per 1 cm.sup.3, a ratio of closed cells having sizes of 100 .mu.m or more to the whole of cells being 1% or less, thereby showing 5% or less of linear transmittance for near infrared rays (.lambda.=900 nm) at a thickness of 1 mm is produced by compacting amorphous silica powder having an average particle size of 0.5-10 .mu.m, in which each of impurities selected from Li, Na, K, Fe, Ti and Al is 1 ppm or less, if any, and sintering the resultant green body at 1730.degree.-1850.degree. C.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: December 17, 1996
    Assignees: Tosoh Corporation, Nippon Silica Glass Co., Ltd.
    Inventors: Kenji Kamo, Kouichi Ono, Koji Tsukuma, Hiroya Nagata, Emiko Abe, Yoshikazu Kikuchi, Yushiharu Funakoshi