Patents by Inventor Seizaburo Abe

Seizaburo Abe 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).

  • Process for pickling steel-based metallic materials at a high speed
    Patent number: 5202002
    Abstract: A process of pickling surfaces of a steel-based metallic material containing iron, carbon and chromium at a high speed wherein the surfaces of the metallic material are pickled at a high speed by dipping and then pickling the surfaces of the metallic material in an aqueous solution of hydrochloric acid or an aqueous solution of hydrochloric acid-nitric acid mixture while at least one kind of ion selected from a group comprising a platinum ion, a palladium ion and a rhodium ion is contained in a hydrochloric acid having a temperature of 50.degree. to 110.degree. C. and a concentration of 100 to 450 g/l with NO.sub.3.sup.- ion contained therein by a quantity of 300 g/l or less, as desired, or pickling treatment in the aforementioned aqueous solution by feeding a direct current between two electrodes at an electric current density of 5 to 200 A/Dm.sup.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: April 13, 1993
    Assignee: Nippon Steel Corporation
    Inventors: Masamitsu Tsuchinaga, Seizaburo Abe
  • Metal sheet that selectively absorbs solar radiation
    Patent number: 4579606
    Abstract: In order to obtain a film having a low electric resistance and a good selective absorption property of solar radiation, good rust proofing and good weldability, a stainless steel is dipped in a chemical conversion bath, in which sodium bichromate or potassium bichromate is mixed with sulfuric acid at a predetermined proportion to one another, in accordance with the method of the present invention. The product film of the present invention comprises metal oxides or metal hydroxides with metal (Fe+Cr) finely dispersed therein.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: April 1, 1986
    Assignee: Nippon Steel Corporation
    Inventors: Takehisa Mizunuma, Seizaburo Abe, Jiro Ohno, Hisashi Kobayashi
  • Method for producing a selective absorption sheet of a solar radiation
    Patent number: 4491487
    Abstract: In order to obtain a film having a low electric resistance and a good selective absorption property of solar radiation, good rust proofing and good weldability, a stainless steel is dipped in a chemical conversion bath, in which sodium bichromate or potassium bichromate is mixed with sulfuric acid at a predetermined proportion to one another, in accordance with the method of the present invention. The product film of the present invention comprises metal oxides or metal hydroxides with metal (Fe+Cr) finely dispersed therein.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: January 1, 1985
    Assignee: Nippon Steel Corporation
    Inventors: Takehisa Mizunuma, Seizaburo Abe, Jiro Ohno, Hisashi Kobayashi
  • Austenitic stainless steel having excellent resistance to intergranular and transgranular stress corrosion cracking
    Patent number: 4162930
    Abstract: There is provided a chromium-nickel austenitic stainless steel having improved resistance to intergranular stress corrosion cracking. The steel has low carbon and phosphorus content or carbon and phosphorus in solid solution fixed by niobium addition. Further resistance to transgranular stress corrosion cracking is realized with a low molybdenum content. The steel is particularly useful in applications involving exposure to high-temperature and high-pressure water and attack by chlorides.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: July 31, 1979
    Assignee: Nippon Steel Corporation
    Inventors: Seizaburo Abe, Masao Kozima, Yuzo Hosoi