Patents by Inventor Hideki Kotsuji

Hideki Kotsuji 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).

  • Leadless brass alloy excellent in stress corrosion cracking resistance
    Patent number: 10023941
    Abstract: By enhancing a stress corrosion cracking resistance in a leadless brass alloy, specifically by suppressing a velocity of propagation of corrosion cracks in the brass alloy, a straight line crack peculiar to the leadless brass alloy is suppressed, a probability of cracks coming into contact with ? phases is heightened and local corrosion on the brass surface is prevented to suppress induction of cracks by the local corrosion, thereby providing a leadless brass alloy contributable to enhancement of the stress corrosion cracking resistance. The present invention is directed to an Sn-containing Bi-based, Sn-containing Bi+Sb-based or Sn-containing Bi+Se+Sb-based leadless brass alloy excellent in stress corrosion cracking resistance, having an ?+? structure or ?+?+? structure and having ? phases distributed uniformly therein at a predetermined proportion to suppress local corrosion and induction of stress corrosion cracks.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: July 17, 2018
    Assignee: KITZ CORPORATION
    Inventors: Hidenobu Tameda, Kazuhito Kurose, Teruhiko Horigome, Tomoyuki Ozasa, Hisanori Terui, Masaru Yamazaki, Hideki Kotsuji
  • Leadless brass alloy excellent in stress corrosion cracking resistance
    Patent number: 8366840
    Abstract: By enhancing a stress corrosion cracking resistance in a leadless brass alloy, specifically by suppressing a velocity of propagation of corrosion cracks in the brass alloy, a straight line crack peculiar to the leadless brass alloy is suppressed, a probability of cracks coming into contact with ? phases is heightened and local corrosion on the brass surface is prevented to suppress induction of cracks by the local corrosion, thereby providing a leadless brass alloy contributable to enhancement of the stress corrosion cracking resistance. The present invention is directed to an Sn-containing Bi-based, Sn-containing Bi+Sb-based or Sn-containing Bi+Se+Sb-based leadless brass alloy excellent in stress corrosion cracking resistance, having an ?+? structure or ?+?+? structure and having ? phases distributed uniformly therein at a predetermined proportion to suppress local corrosion and induction of stress corrosion cracks.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: February 5, 2013
    Assignee: Kitz Corporation
    Inventors: Hidenobu Tameda, Kazuhito Kurose, Teruhiko Horigome, Tomoyuki Ozasa, Hisanori Terui, Masaru Yamazaki, Hideki Kotsuji
  • LEADLESS BRASS ALLOY EXCELLENT IN STRESS CORROSION CRACKING RESISTANCE
    Publication number: 20090297390
    Abstract: By enhancing a stress corrosion cracking resistance in a leadless brass alloy, specifically by suppressing a velocity of propagation of corrosion cracks in the brass alloy, a straight line crack peculiar to the leadless brass alloy is suppressed, a probability of cracks coming into contact with ? phases is heightened and local corrosion on the brass surface is prevented to suppress induction of cracks by the local corrosion, thereby providing a leadless brass alloy contributable to enhancement of the stress corrosion cracking resistance. The present invention is directed to an Sn-containing Bi-based, Sn-containing Bi+Sb-based or Sn-containing Bi+Se+Sb-based leadless brass alloy excellent in stress corrosion cracking resistance, having an ?+? structure or ?+?+? structure and having ? phases distributed uniformly therein at a predetermined proportion to suppress local corrosion and induction of stress corrosion cracks.
    Type: Application
    Filed: December 28, 2007
    Publication date: December 3, 2009
    Inventors: Tameda Hidenobu, Kazuhito Kurose, Teruhiko Horigome, Tomoyuki Ozasa, Hisanori Terui, Masaru Yamazaki, Hideki Kotsuji