Patents by Inventor Kahlil Yacoub

Kahlil Yacoub 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).

  • Membranes formed from rigid aromatic polyimide polymers
    Patent number: 5009679
    Abstract: The present invention is a class of semi-permeable polymeric membranes and processes for using such membranes to separate one or more components of a gas mixture. The membranes are formed from aromatic polyimides derived from reaction of a 9,9-bis-(3,4-dicarboxyphenyl)-fluorene dianhydride and at least one aromatic diamine. These polyimide membranes exhibit high gas perm-selectivities and are especially useful in effecting the separation of oxygen and nitrogen from air.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: April 23, 1991
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Richard O. Angus, Kahlil Yacoub