Patents by Inventor Yanfei Du

Yanfei Du 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).

  • Double-sided color photographic paper
    Patent number: 8409791
    Abstract: Disclosed is a double-sided color photographic paper, including, in order, a first protection layer, a first photosensitive layer, a supporting substrate, a second photosensitive layer and a second protection layer. The supporting substrate has a first surface and a second surface opposite to the first surface. A first barrier layer and at least one layer of a first shading layer are sandwiched between the first photosensitive layer and the first surface of the supporting substrate. The first barrier layer is arranged between the first photosensitive layer and the first shading layer; a second barrier layer and at least one layer of a second shading layer are sandwiched between the second surface of the supporting substrate and the second photosensitive layer, and the second barrier layer is arranged between the second shading layer and the second photosensitive layer.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: April 2, 2013
    Assignees: China Lucky Film Group Corporation, Lucky Film Co., Ltd.
    Inventors: Yaning Li, Yanfei Du, Jianguo Guo, Wengui Wang
  • Double-Sided Color Photographic Paper
    Publication number: 20110236829
    Abstract: Disclosed is a double-sided color photographic paper, including, in order, a first protection layer, a first photosensitive layer, a supporting substrate, a second photosensitive layer and a second protection layer. The supporting substrate has a first surface and a second surface opposite to the first surface. A first barrier layer and at least one layer of a first shading layer are sandwiched between the first photosensitive layer and the first surface of the supporting substrate. The first barrier layer is arranged between the first photosensitive layer and the first shading layer; a second barrier layer and at least one layer of a second shading layer are sandwiched between the second surface of the supporting substrate and the second photosensitive layer, and the second barrier layer is arranged between the second shading layer and the second photosensitive layer.
    Type: Application
    Filed: November 17, 2009
    Publication date: September 29, 2011
    Applicants: CHINA LUCKY FILM GROUP CORPORATION, LUCKY FILM CO., LTD
    Inventors: Yaning Li, Yanfei Du, Jianguo Guo, Wengui Wang