Patents by Inventor Kazuo Pujita

Kazuo Pujita 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).

  • Publication number: 20070181231
    Abstract: Disclosed are methods of producing steel rails having a high carbon content and being excellent in wear resistance and ductility from the slabs for rails. One method involves producing a steel rail having a high content of carbon, comprising finish rolling the rail in two consecutive passes, with a reduction rate per pass of a cross-section of the rail of 2-30%, wherein the conditions of the finish rolling satisfy the following relationship: S?800/(C×T), wherein S is the maximum rolling interval time (seconds), C is the carbon content of the steel, wherein the carbon content is 0.85-1.40 mass %, and T is the maximum surface temperature (° C.) of the rail head.
    Type: Application
    Filed: March 9, 2005
    Publication date: August 9, 2007
    Inventors: Masaharu Ueda, Kazuo Pujita, Koichiro Matsushita, Takeshi Yamamoto, Takuya Satoh