Patents by Inventor Seturo Ito

Seturo Ito 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).

  • Abrasion resistant glass
    Patent number: 5741745
    Abstract: Abrasion resistant glass, which consists essentially of the following components:______________________________________ SiO.sub.2 75.5 to 85.5 (wt %), RO 1 to 8 (wt %), R'.sub.2 O 10 to 23.5 (wt %), RO + R'.sub.2 O 11 to 24.5 (wt %), Al.sub.2 O.sub.3 0 to 5 (wt %), ______________________________________ RO/R'.sub.2 O (weight ratio) at most 0.5,provided that R is at least one member selected from Mg and Ca, and R' is at least one member selected from Li, Na and K, and of which the density measured at room temperature is at most 2.41 g/cc.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: April 21, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Jeetendra Sehgal, Junichiro Kase, Akira Takada, Hideo Takahashi, Yasumasa Nakao, Seturo Ito
  • Abrasion resistant glass
    Patent number: 5721181
    Abstract: Abrasion resistant glass, which consists essentially of the following components:______________________________________ SiO.sub.2 74 to 85.5 (wt %), B.sub.2 O.sub.3 0.5 to 5 (wt %), SiO.sub.2 + B.sub.2 O.sub.3 76 to 88 (wt %), RO 1 to 9 (wt %), R'.sub.2 O 10 to 23 (wt %), RO + R'.sub.2 O 11 to 24 (wt %), Al.sub.2 O.sub.3 0 to 5 (wt %), RO/R'.sub.2 O (weight ratio) at most 0.6, ______________________________________provided that R is at least one member selected from Mg and Ca, and R' is at least one member selected from Li, Na and K, and of which the density measured at room temperature is at most 2.43 g/cc.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: February 24, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Jeetendra Sehgal, Junichiro Kase, Akira Takada, Hideo Takahashi, Yasumasa Nakao, Seturo Ito