Patents by Inventor Christopher R. Goward

Christopher R. Goward 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).

  • Method for the purification of Erwinia L-asparaginase
    Patent number: 5310670
    Abstract: A process is provided for the purification of L-asparaginase by contacting a crude extract of L-asparaginase with a solid medium having cation exchange groups so as to adsorb L-asparaginase on the support and eluting adsorbed L-asparaginase from the support. The cation exchange groups comprise sulphonate groups and the elution step is carried out at a pH which is higher than the pH used in the contacting step.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: May 10, 1994
    Assignee: Public Health Laboratory Service Board
    Inventor: Christopher R. Goward