Patents by Inventor Takehiko Nunokawa

Takehiko Nunokawa 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).

  • Graphite sheet and manufacturing method of the same
    Patent number: 8221883
    Abstract: For a graphite sheet, a peak intensity ratio (P100/002) of a (100) diffraction peak and a (002) diffraction peak by X-ray diffractometry, and a peak intensity ratio (P110/002) of a (110) diffraction peak and a (002) diffraction peak thereby are set at 10 or more. The graphite sheet is manufactured through a step of preparing a polymer liquid which contains a polymer having carbon in its molecular chains and develops optical anisotropy, a step of unidirectionally orienting the molecular chains of the polymer, a step of obtaining a compact from the polymer liquid in the state that the orientation of the molecular chains of the polymer is maintained, and a step of carbonizing and thereafter graphitizing the compact.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 17, 2012
    Assignee: Polymatech Co., Ltd.
    Inventors: Naoyuki Shimoyama, Takehiko Nunokawa
  • Graphite Sheet and Manufacturing Method of the Same
    Publication number: 20090220793
    Abstract: For a graphite sheet, a peak intensity ratio (P100/002) of a (100) diffraction peak and a (002) diffraction peak by X-ray diffractometry, and a peak intensity ratio (P110/002) of a (110) diffraction peak and a (002) diffraction peak thereby are set at 10 or more. The graphite sheet is manufactured through a step of preparing a polymer liquid which contains a polymer having carbon in its molecular chains and develops optical anisotropy, a step of unidirectionally orienting the molecular chains of the polymer, a step of obtaining a compact from the polymer liquid in the state that the orientation of the molecular chains of the polymer is maintained, and a step of carbonizing and thereafter graphitizing the compact.
    Type: Application
    Filed: January 28, 2009
    Publication date: September 3, 2009
    Applicant: POLYMATECH CO., LTD.
    Inventors: Naoyuki Shimoyama, Takehiko Nunokawa