Patents by Inventor HIDENAO YAMAGUCHI

HIDENAO YAMAGUCHI 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).

  • RARE EARTH ELEMENT-CONTAINING HYDROGEN STORAGE ALLOY, METHOD OF PRODUCING THE SAME, NEGATIVE ELECTRODE USING SAID ALLOY, AND ALKALINE RECHARGEABLE BATTERY USING SAID ELECTRODE ENCAPSULATED
    Publication number: 20010015243
    Abstract: Provided is a rare earth element-containing hydrogen storage alloy which fulfills at least one requirement selected from the requirements that (1) the total content of nonmetal elements present as impurities in the alloy matrix is not higher than 1,200 ppm by weight, (2) the total content of alkaline earth metal elements present as impurities in the alloy matrix is not higher than 100 ppm by weight, (3) the content of Mg present as an impurity in the alloy matrix is not higher than 80 ppm by weight, (4) the content of Cl present as an impurity in the alloy matrix is not higher than 10 ppm by weight, (5) the content of Pb present as an impurity in the alloy matrix is not higher than 100 ppm by weight, (6) the alloy has, in a surface layer covering from the alloy surface to a depth of 20 nm, an oxygen concentration that decreases sharply in the depth direction and is not higher than 10 weight % on the average in the surface layer defined above, (7) the alloy comprises Ni as a constituent element and contains,
    Type: Application
    Filed: May 18, 1999
    Publication date: August 23, 2001
    Inventors: SATOSHI SHIMA, HIROTO SUGAHARA, JUNJI MADONO, HIDENAO YAMAGUCHI