Patents by Inventor Yi H. Ma

Yi H. Ma 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).

  • Formation of zeolite membranes from sols
    Patent number: 5258339
    Abstract: The present invention relates to a method of forming a zeolite membrane. The method includes forming an aqueous-based or an alcohol-based sol which can form a zeolite. The sol composition is then disposed on a porous support. The porous support and the sol composition are exposed to an atmosphere and to a temperature sufficient to cause the sol composition to hydrothermally crystallize, thereby forming the zeolite membrane.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: November 2, 1993
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi H. Ma, Shouhe Xiang