Patents by Inventor Takuji Nishi

Takuji Nishi 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).

  • Vitreous silica crucible and method of manufacturing the same
    Patent number: 9637411
    Abstract: A method of manufacturing a vitreous silica crucible includes: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a cross-sectional shape of an inverse trapezoid and a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line. The groove line is formed by repeating shifting a focal point of a laser.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: May 2, 2017
    Assignee: SUMCO CORPORATION
    Inventors: Toshiaki Sudo, Taira Sato, Shuichi Ikehata, Manabu Shonai, Takuji Nishi, Takaya Satou, Shinsuke Yamazaki
  • VITREOUS SILICA CRUCIBLE AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20170066686
    Abstract: A method of manufacturing a vitreous silica crucible includes: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a cross-sectional shape of an inverse trapezoid and a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line. The groove line is formed by repeating shifting a focal point of a laser.
    Type: Application
    Filed: November 17, 2016
    Publication date: March 9, 2017
    Inventors: Toshiaki SUDO, Taira SATO, Shuichi IKEHATA, Manabu SHONAI, Takuji NISHI, Takaya SATOU, Shinsuke YAMAZAKI
  • Vitreous silica crucible and method of manufacturing the same
    Patent number: 9534318
    Abstract: The present invention provides a method of manufacturing a vitreous silica crucible including: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: January 3, 2017
    Assignee: SUMCO CORPORATION
    Inventors: Toshiaki Sudo, Taira Sato, Shuichi Ikehata, Manabu Shonai, Takuji Nishi, Takaya Satou, Shinsuke Yamazaki
  • VITREOUS SILICA CRUCIBLE AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20120167821
    Abstract: The present invention provides a method of manufacturing a vitreous silica crucible including: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line.
    Type: Application
    Filed: December 22, 2011
    Publication date: July 5, 2012
    Applicant: JAPAN SUPER QUARTZ CORPORATION
    Inventors: Toshiaki SUDO, Taira SATO, Shuichi IKEHATA, Manabu SHONAI, Takuji NISHI, Takaya SATOU, Shinsuke YAMAZAKI
  • Crack prevention for pneumatic tire
    Patent number: 3938572
    Abstract: A pneumatic tire provided with a plurality of slots which are provided in tread grooves and extend in the transverse direction of the grooves but at a suitable spacing from each other for the purpose of confining between the slots the growth of cracks produced in the grooves, so that each crack is prevented from growing up to an extent exceeding the spacing between the slots.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: February 17, 1976
    Assignee: The Yokohama Rubber Co. Ltd.
    Inventors: Takuji Nishi, Kenhachi Mitsuhashi, Tadanobu Nagumo