Patents by Inventor Zain E. Saad

Zain E. Saad 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).

  • Multilayered antioxidant film
    Patent number: 5562874
    Abstract: A coextruded multilayer film having increased retention of volatile antioxidants and process for making the film. The multilayer film includes an antioxidant layer containing a volatile antioxidant, said antioxidant layer being semipermeable to the volatile antioxidant; and a barrier layer, impermeable to the volatile antioxidant. The film can be produced on a conventional blown film process with the barrier layer coextruded externally to the antioxidant layer. The barrier layer traps the volatile antioxidant inside the tube of the blown film process, reducing the amount of volatile antioxidant migrating from the film.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: October 8, 1996
    Assignee: Dowbrands L.P.
    Inventors: Zain E. Saad, Carlton E. Beyer