Patents by Inventor Louise A. Errede

Louise A. Errede 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).

  • Composite chromatographic article
    Patent number: 4906378
    Abstract: A composite chromatographic article comprising: (a) a polytetrafluoroethylene fibril matrix, and(b) non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to polytetrafluoroethylene being in the range of 19:1 to 4:1 by weight, said composite article having a net surface energy in the range of 20 to 300 milliNewtons per meter.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: March 6, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Steven J. St. Mary, Louise A. Errede