Patents by Inventor Don B. Clewell

Don B. Clewell 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: 4631259
    Abstract: Processes and new genetic materials are provided for cloning specific DNA fragments by using a unique conjugative transposon designated Tn916. The transposon is used to first target specific genes by insertional inactivation. A restriction fragment containing the inserted transposon is then inserted into a plasmid vector and transformed into Escherichia coli or other suitable host by selection for the transposon encoded tetracycline (Tc) resistance. The transformants so produced are then grown in the absence of tetracycline conditions under which Tn916 excises from the chimeric plasmid thus restoring the integrity of the DNA into which the transposon was originally inserted. This process provides a new and useful way of producing new life forms that are useful for making desired products having established utility.
    Type: Grant
    Filed: May 4, 1983
    Date of Patent: December 23, 1986
    Assignee: Board of Regents of The University of Michigan
    Inventors: Don B. Clewell, Mary C. Gawron-Burke