Patents by Inventor Pi-Jen Cheng

Pi-Jen Cheng 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).

  • Precursor composition for polyimide and use thereof
    Patent number: 8735534
    Abstract: The present invention provides a precursor composition for polyimides, said composition comprising an amic acid oligomer of formula (1) and a dianhydride derivative with ester (—C(O)OR) and carboxy (—C(O)OH) terminal groups of formula (2): wherein R, G, G1, P, D and m are as defined in the specification. The invention also provides polyimides synthesized from the above-mentioned precursor composition.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: May 27, 2014
    Assignee: Eternal Chemical Co., Ltd.
    Inventors: Chung-Jen Wu, Pi-Jen Cheng
  • PHOTOSENSITIVE RESIN COMPOSITION AND ITS APPLICATION
    Publication number: 20110212402
    Abstract: A photosensitive resin composition comprising: a photosensitive polyimide of formula (I); an acrylate monomer; and a photoinitiator, wherein A, B, D, J, m, and n are as defined in the specification.
    Type: Application
    Filed: July 15, 2010
    Publication date: September 1, 2011
    Inventors: Meng-Yen Chou, Chuan-Zong Lee, Pi-Jen Cheng, Jui-Kai Hu
  • PRECURSOR COMPOSITION FOR POLYIMIDE AND USE THEREOF
    Publication number: 20100168265
    Abstract: The present invention provides a precursor composition for polyimides, said composition comprising an amic acid oligomer of formula (1) and a dianhydride derivative with ester (—C(O)OR) and carboxy (—C(O)OH) terminal groups of formula (2): wherein R, G, G1, P, D and m are as defined in the specification. The invention also provides polyimides synthesized from the above-mentioned precursor composition.
    Type: Application
    Filed: October 2, 2009
    Publication date: July 1, 2010
    Applicant: ETERNAL CHEMICAL CO., LTD.
    Inventors: CHUNG-JEN WU, Pi-Jen Cheng