Patents by Inventor Tammy M. Chalmers

Tammy M. Chalmers 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).

  • Respiratory mask having comfortable inner cover web
    Patent number: 6041782
    Abstract: A respiratory mask 1 has a molded, cup-shaped, shape-retaining shell 10 on the concave side of which is a layer of filter material 11 and, on the concave side of the filter material, without any intermediate shape-retaining layer, a layer of nonwoven material 12. The layer of filter material 11 and the inside layer 12 are conformed into the cup-shaped configuration of the shape-retaining shell 10. The inside layer 12 is preferably a smooth BMF material offering improved comfort to the wearer.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: March 28, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Seyed Abolhassan Angadjivand, Tammy M. Chalmers, James F. Dyrud, Simon A. Mortimer, Scott J. Tuman, Cynthia Y. Tamaki, Graham J. Bostock