Patents by Inventor Robert P. Castro

Robert P. Castro 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).

  • Multilayer interfacial composite membrane
    Patent number: 5049167
    Abstract: A composite membrane particularly useful for gas separation or pervaporation. The membrane has three layers: a microporous substrate, an intermediate sealing layer, and a top permselective layer. The permselective layer is made by interfacial polymerization directly on the sealing layer. The sealing layer prevents penetration of the interfacial polymerization reagents into the substrate pores during membrane preparation and provides a gutter layer in the finished membrane.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: September 17, 1991
    Assignee: Membrane Technology & Research, Inc.
    Inventors: Robert P. Castro, Richard W. Baker, Johannes G. Wijmans