Patents by Inventor Yoshichika Kitagawa

Yoshichika Kitagawa 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).

  • DNA fragment coding for mercuric reductase of thiobacillus, and recombinant plasmid
    Patent number: 5348888
    Abstract: Microorganisms of the genus Thiobacillus find utility in the mining industry in such applications as bacterial leaching, the treatment of mine drainage water and the deiron in hydrometallurgy process. This invention discloses a DNA fragment which codes for a mercuric reductase in microorganisms of the genus Thiobacillus and is useful in constructing a new strain of Thiobacillus ferrooxidans capable of fast growth. A recombinant plasmid incorporating the DNA fragment, a shuttle vector plasmid incorporating the DNA fragment, host cells and a method of transforming the host cells are also disclosed.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: September 20, 1994
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Toshikazu Shiratori, Chihiro Inoue, Yoshichika Kitagawa, Tomonobu Kusano