Patents by Inventor Janice D. Caldwell

Janice D. Caldwell 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).

  • Barrier film
    Patent number: 4880697
    Abstract: A multi-layer barrier film having heat seal properties to permit both fin and lap sealing is disclosed. The film comprises a pair of coextrusions that are adhesively bonded to one another.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: November 14, 1989
    Assignee: Reynolds Metals Company
    Inventors: Janice D. Caldwell, Walter H. Knox, III