Patents by Inventor Richard James Pearce

Richard James Pearce 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).

  • Purification and concentration of synthetic biological molecules
    Patent number: 8075780
    Abstract: The present invention is an ultrafiltration (UF) membrane having a nominal molecular weight cut off (NMWCO) of from about 0.5 KD to about 10 KD wherein the membrane surfaces have a charge that is either positive or negative. The present invention is also a method of using the charged UF membrane to purify and concentrate synthetic biological molecules by using the charged surface either to repel the synthetic biomolecules retaining them in the retentate or to attract the synthetic biomolecules preferentially for filtration through the membrane.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: December 13, 2011
    Assignee: Millipore Corporation
    Inventor: Richard James Pearce