Patents by Inventor Taeko OZAWA

Taeko OZAWA 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).

  • Ink composition for reversibly thermochromic stamp and stamp
    Patent number: 11015076
    Abstract: An ink composition for a reversibly thermochromic stamp including a reversibly thermochromic microencapsulated pigment encapsulating a reversibly thermochromic composition including: Component (A): an electron-donating color-developing organic compound, Component (B): an electron-accepting compound, and Component (C): a reaction medium causing reversibly an electron transfer reaction between the Component (A) and the Component (B) in a specific temperature range, water and a thickener.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 25, 2021
    Assignees: KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.
    Inventors: Akio Nakashima, Hiroshi Umemoto, Taeko Ozawa
  • INK COMPOSITION FOR REVERSIBLY THERMOCHROMIC STAMP AND STAMP
    Publication number: 20170088737
    Abstract: An ink composition for a reversibly thermochromic stamp including a reversibly thermochromic microencapsulated pigment encapsulating a reversibly thermochromic composition including: Component (A): an electron-donating color-developing organic compound, Component (B): an electron-accepting compound, and Component (C): a reaction medium causing reversibly an electron transfer reaction between the Component (A) and the Component (B) in a specific temperature range, water and a thickener.
    Type: Application
    Filed: April 23, 2015
    Publication date: March 30, 2017
    Applicants: KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.
    Inventors: Akio NAKASHIMA, Hiroshi UMEMOTO, Taeko OZAWA