Patents by Inventor Etsurou Nakao

Etsurou Nakao 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).

  • Separator for an alkaline battery
    Patent number: 4699858
    Abstract: Disclosed is a separator formed of a non-woven fabric having a ratio of CONH/CH.sub.2 in the range of 1/9 to 1/12 for use in a battery. The seperator of the invention shows superior alkali/oxidation resistance with good electrolyte retainability resulting in a longer life battery.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: October 13, 1987
    Assignee: Firma Carl Freudenberg
    Inventors: Etsurou Nakao, Hiroaki Yamazaki, Masaki Hirooka