Patents by Inventor Weigong Zheng

Weigong Zheng 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).

  • Patent number: 6140462
    Abstract: The present invention is directed to oxidative and reductive methods of fabricating electrically conducting polymers and precursors thereof in particular polyanilines in which the polymer chains are deaggregated. Such deaggregated conducting polymers and precusors thereof exhibit better processability and higher electrical conductivity than do the corresponding aggregated polymers. Substituted and unsubstituted polyanilines in the substantially non oxidized or non reduced form (emeraldine form) are converted to an intermediate deaggregated reduced or oxidized form. The intermediate reduced or oxidized deaggregated form is processed into an article. The articles is subsequently treated with a dopant and an oxidizing or reducing agent to reform the original substantially non oxidized or non reduced form. The methods described herein permit the formation of articles such as shaped articles and films having deaggregated structure and higher electrical conductivity.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: October 31, 2000
    Assignee: International Business Machines Corporation
    Inventors: Marie Angelopoulos, Alan Graham MacDiarmid, Weigong Zheng
  • Patent number: 6090985
    Abstract: The present invention generally describes novel chiral polyanilines in their doped (protonated) forms and novel methods for their chemical synthesis comprising polymerizing an aniline monomer in the presence of a chiral dopant acid, an oxidizing agent, and, optionally, a substrate, and their conversion by treatment with a base to novel chiral polyanilines in their de-doped base forms. The novel chiral polyanilines of the present invention may be used as electrodes for asymmetric synthesis, as biological sensors and as separation materials in pharmaceutical applications.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: July 18, 2000
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Alan G. MacDiarmid, Leon A. P. Kane-Maguire, Weigong Zheng, Gordon G. Wallace, Ian D. Norris