Patents by Inventor Hirotugu Kubo

Hirotugu Kubo 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).

  • Golden-colored printing ink
    Patent number: 4221593
    Abstract: Golden-colored printing ink consisting of golden-colored powder of a brass alloy in the form of fine foils or flakes; and a vehicle essentially comprising a synthetic resin varnish which never affects said golden-colored powder, such as changes in the color and property thereof, and having an agent which is adapted to prevent change in the color and property of said golden-colored powder; said golden-colored powder and said vehicle being fully stirred and mixed with each other to form a sol.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: September 9, 1980
    Assignee: Mitsuboshi Printing Ink Co., Ltd.
    Inventor: Hirotugu Kubo