Patents Assigned to Stanley I. Wolf
  • Air-pollution filter and face mask
    Patent number: 4141703
    Abstract: A flexible polymeric mask, which covers the mouth and at least the lower part of the nose, has exhale-valve means and vertical supporting means for air-intake filter means. The filter means provides a wearer of the mask with air which has passed, in sequence, through, e.g., porous foam, activated charcoal, filter paper, absorbent cellulose and gauze.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: February 27, 1979
    Assignee: Stanley I. Wolf
    Inventor: Charles L. Mulchi
  • Air-pollution filter and face mask
    Patent number: 4064876
    Abstract: A flexible polymeric mask, which covers the mouth and at least the lower part of the nose, has exhale-valve means and vertical supporting means for air-intake filter means. The filter means provides a wearer of the mask with air which has passed, in sequence, through, e.g., porous foam, activated charcoal, filter paper, absorbent cellulose and gauze.
    Type: Grant
    Filed: January 30, 1976
    Date of Patent: December 27, 1977
    Assignee: Stanley I. Wolf
    Inventor: Charles L. Mulchi