Patents by Inventor Andy C. M. Chang

Andy C. M. Chang 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).

  • Plasmid vectors for cellular slime moulds of the genus dictyostelium
    Patent number: 5389526
    Abstract: The present invention relates generally to the fields of molecular biology and the production of recombinant protein using cellular slime moulds of the genus Dictyostelium. Most particularly, the present invention relates to novel strains of the genus Dictyostelium, recombinant plasmids for use with strains of the genus Dictyostelium, and polypeptides which facilitate the extrachromosomal replication of such plasmids in strains of the genus Dictyostelium. In particular, the present invention provides a polypeptide which facilitates the extrachromosomal replication of a recombinant plasmid in Dictyostelium spp in which the recombinant plasmid includes an origin of replication derived from a Ddp2-like plasmid but which lacks functional genes for extrachromosomal replication in wild type Dictyostelium spp.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: February 14, 1995
    Inventors: Martin B. Slade, Andy C. M. Chang, Keith L. Williams