Patents by Inventor Petter Gustaffson

Petter Gustaffson 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 having temperature dependent plasmid copy number
    Patent number: 4487835
    Abstract: Gene products of plasmid DNA, such as proteins, are prepared in high yields by cultivating bacteria carrying a plasmid which shows a controlled constant plasmid copy number at one temperature and a much higher or totally uncontrolled copy number at a different temperature. The plasmid may be prepared by recombinant DNA technique using a cloning vector showing the temperature dependent plasmid copy number pattern.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: December 11, 1984
    Assignee: A/S Alfred Benzon
    Inventors: Bernt E. Uhlin, Kurt Nordstr/o/ m, Soeren Molin, Petter Gustaffson