Patents by Inventor Cassilis T. Zaspalis

Cassilis T. Zaspalis 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).

  • Process for the preparation of a binary membrane top layer
    Patent number: 5030351
    Abstract: Preparation of binary membrane ultrafiltration (UF) toplayers (Al.sub.2 O.sub.3 -CeO.sub.2 and Alhd 2O.sub.3 -TiO.sub.2) to make chemically stable UF membranes and/or or catalytically active membranes. Two stable sols are prepared and mixed under controlled conditions and a top layer is prepared on a support under controlled conditions.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: July 9, 1991
    Assignee: Massachusetts Institute of Technology
    Inventors: Anthonie J. Burggraaf, Klaas Keizer, Cassilis T. Zaspalis