Patents by Inventor Subra Rao Surampudi

Subra Rao Surampudi 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).

  • LaNi.sub.5 is-based metal hydride electrode in Ni-MH rechargeable cells
    Patent number: 5888665
    Abstract: An at least ternary metal alloy of the formula AB.sub.(Z-Y) X.sub.(Y) is disclosed. In this formula, A is selected from the rare earth elements, B is selected from the elements of Groups 8, 9, and 10 of the Periodic Table of the Elements, and X includes at least one of the following: antimony, arsenic, germanium, tin or bismuth. Z is greater than or equal to 4.8 and less than or equal to 6.0. Y is greater than 0 and less than 1. Ternary or higher-order substitutions to the base AB.sub.5 alloys that form strong kinetic interactions with the predominant metals in the base metal hydride are used to form metal alloys with high structural integrity after multiple cycles of hydrogen sorption.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: March 30, 1999
    Assignee: California Institute of Technology
    Inventors: Ratnakumar V. Bugga, Brent Fultz, Robert Bowman, Subra Rao Surampudi, Charles K. Witham, Adrian Hightower