Patents by Inventor Leroy J. Herauf

Leroy J. Herauf 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).

  • Particulate monitoring tape
    Patent number: 5085937
    Abstract: A tape for sampling a surface to determine the amount of particulate matter which has settled thereon. The tape is constructed of a polymeric film backing and a smooth, pigmented adhesive coating. A grid pattern is printed directly on the outer surface of the adhesive coating. Alternatively, the adhesive may be transparent, the film backing pigmented, and the grid pattern printed on the film backing. In this manner, the tape may be applied directly to the surface to be sampled, and particulates will adhere to the outer surface of the adhesive coating. The particulate level may then be determined according to the average number of particulates in a given square formed by the grid pattern.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: February 4, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Leroy J. Herauf
  • Particulate monitoring tape
    Patent number: 5080972
    Abstract: A tape for sampling a surface to determine the amount of particulate matter which has settled thereon. The tape is constructed of a polymeric film backing and a smooth, pigmented adhesive coating. A grid pattern is printed directly on the outer surface of the adhesive coating. In this manner, the tape may be applied directly to the surface to be sampled, and particulates will adhere to the outer surface of the adhesive coating. The particulate level may then be determined according to the average number of particulates in a given square formed by the grid pattern.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: January 14, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Leroy J. Herauf