Patents by Inventor Charlie A. Hanf

Charlie A. Hanf 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).

  • Patent number: 5712210
    Abstract: A longitudinally extending web of lofty nonwoven abrasive surface treatment material is provided in a coreless roll form to the end user. Successive wraps of the nonwoven abrasive material have interengaging surfaces sufficient to maintain the material in a spirally wrapped configuration yet being readily separable. A plurality of longitudinally spaced and laterally disposed perforations through the web permit the user to successively separate the web into a plurality of sheets of abrasive surface treatment material. In a preferred embodiment, the roll is encased in a protective shrink wrap sheath, and each sheet is separated from the roll by separating said sheet from an innermost wrap of the roll.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: January 27, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Laurie A. Windisch, Louis S. Moren, Charlie A. Hanf, C. Mathew Barnard