Patents by Inventor Kajin Saito

Kajin Saito 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).

  • Golden yellow pigment
    Patent number: 5246493
    Abstract: A golden yellow pigment having good corrosion resistance and weather resistance is disclosed, which comprises titanium metal flakes the surfaces of which are covered with a titanium nitride layer, the titanium nitride-covered titanium metal flakes having a nitrogen content of from 5 to 22% by weight, an oxygen content of 2% by weight or less, and an aspect ratio of 10 or more.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: September 21, 1993
    Assignees: Showa Denko K.K., Showa Alumi Powder K.K.
    Inventors: Shunsuke Nagasaki, Kajin Saito, Takuya Tamou
  • Process for producing metal powder having controlled particle size distribution for metallic pigments
    Patent number: 5062886
    Abstract: Disclosed is a graded metal powder for metallic pigment, comprising a metal powder wherein the metal powder has a mean particle size of from about 2.5 to about 15.0 .mu.m, the content of particles having a particle size of not greater than 1 .mu.m is not larger than about 0.5% by volume, and the metal powder has a particle size distribution such that not smaller than 97% by volume of the particles of the metal powder fall within the range between half the mean particle size of the metal powder and double the mean particle size of the metal powder. Also is disclosed a process for producing a graded metal powder by classifying metal particles dispersed in a mineral oil containing a nonionic-anionic surfactant.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: November 5, 1991
    Assignee: Showa Alumi Powder K.K.
    Inventors: Sinya Ozawa, Katsumi Kondo, Kajin Saito
  • Metal powder having controlled particle size distribution for metallic pigments and process for producing the same
    Patent number: 4976777
    Abstract: Disclosed is a graded metal powder for metallic pigment, comprising a metal powder wherein the metal powder has a mean particle size of from about 2.5 to about 15.0 .mu.m, the content of particles having a particle size of not greater than 1 .mu.m is not larger than about 0.5% by volume, and the metal powder has a particle size distribution such that not smaller than 97% by volume of the particles of the metal powder fall within the range between half the mean particle size of the metal powder and double the mean particle size of the metal powder. Also is disclosed a process for producing a graded metal powder by classifying metal particles dispersed in a mineral oil containing a nonionic-anionic surfactant.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: December 11, 1990
    Assignee: Showa Alumi Powder Kabushiki Kaisha
    Inventors: Sinya Ozawa, Katsumi Kondo, Kajin Saito