Patents Represented by Attorney Cecilia Hill

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  • 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