Patents by Inventor Sadao Isshiki

Sadao Isshiki 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).

  • Plasmid containing a gene for tetracycline resistance and DNA fragments derived therefrom
    Patent number: 5158891
    Abstract: A plasmid and a DNA fragment each of which contains a gene for tetracycline resistance derived from a glutamic acid-producing coryneform bacterium, and a coryneform bacterium containing said DNA fragment. The gene for tetracycline resistance derived from a glutamic acid-producing coryneform bacterium is a useful selective marker in effecting the breeding of a glutamic acid-producing coryneform bacterium by genetic recombination. Using the plasmid, the DNA fragment or the coryneform bacterium of the present invention, breeding of the glutamic acid-producing coryneform bacterium can be easily and effectively conducted by means of recombinant DNA technique.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: October 27, 1992
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yasuhiko Takeda, Mikio Fujii, Yukihiro Nakajo, Sadao Isshiki