Patents by Inventor Chong-Pil Pae

Chong-Pil Pae 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).

  • Prism sheet having concave pentagonal
    Patent number: 7397619
    Abstract: A prism sheet having a concave pentagonal structure is disclosed. The prism sheet comprises a base layer, and a prism array disposed on and supported by the base layer. The prism array is composed of a plurality of prisms aligned in parallel and one beside the other. The transversal cross-section of each prism has a shape of concave pentagon, which is symmetrical about a vertical line passing the apex. The interior angle ? of the apex is 30°???120°, the exterior angle ? formed by the upper slant side and the lower slant side is ?<180°, the interior angle ? of the lower vertex formed by the lower slant side and the base is 5°???85° and the length w of the base is 30 ?m?w?100 ?m. Preferably, the interior angle ? of the apex may be 40°???100°, the exterior angle ? formed by the upper slant side and the lower slant side may be 160°???179°, and the interior angle ? of the lower vertex formed by the lower slant side and the base may be 30°???60°. Preferably, the length w of the base may be 40 ?m?w?60 ?m.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: July 8, 2008
    Assignee: Doosan Corporation
    Inventors: Jang-Hwan Hwang, Chong-Pil Pae, Min-Cheol Kook
  • Prism sheet having concave pentagonal
    Publication number: 20070115570
    Abstract: A prism sheet having a concave pentagonal structure is disclosed. The prism sheet comprises a base layer, and a prism array disposed on and supported by the base layer. The prism array is composed of a plurality of prisms aligned in parallel and one beside the other. The transversal cross-section of each prism has a shape of concave pentagon, which is symmetrical about a vertical line passing the apex. The interior angle a of the apex is 30°???120°, the exterior angle ? formed by the upper slant side and the lower slant side is ?<180°, the interior angle ? of the lower vertex formed by the lower slant side and the base is 5°???85° and the length w of the base is 30 ?m?w?100 ?m. Preferably, the interior angle ? of the apex may be 40°???100°, the exterior angle ? formed by the upper slant side and the lower slant side may be 160°???179°, and the interior angle ? of the lower vertex formed by the lower slant side and the base may be 30°???60°. Preferably, the length w of the base may be 40 ?m?w?60 ?m.
    Type: Application
    Filed: July 30, 2004
    Publication date: May 24, 2007
    Applicant: Doosan Corporation Electro-Materials BG
    Inventors: Jang-Hwan Hwang, Chong-Pil Pae, Min-Cheol Kook