Patents by Inventor Thomas R. McAvoy

Thomas R. McAvoy 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).

  • Abrasive article containing helically crimped fibers
    Patent number: 4893439
    Abstract: Abrasive article comprising an open, lofty nonwoven web comprising helically crimped synthetic organic fibers. The article can optionally contain stuffer box crimped fibers and melt bondable fibers. The presence of helically crimped fibers brings about greater durability and greater capacity for absorbing debris.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: January 16, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas R. McAvoy, Fred H. Bland
  • Surface treating pad having a renewable surface
    Patent number: 4437271
    Abstract: A surface treating pad having a renewable working surface comprises a base layer upon which is removably fastened at least one unitary stack comprising a plurality of thin layers of lofty nonwoven abrasive material. The layers on the stack are removably fastened together and to the base layer so that individual layers may be easily separated from the stack or from the base layer to expose a fresh surface treating working face without damage to the remainder of the pad. The pads are particularly suited for treating floors.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: March 20, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Thomas R. McAvoy
  • Low density abrasive article
    Patent number: 4018575
    Abstract: A low-density abrasive article, especially suited for scouring steel griddle surfaces without causing undesirable surface roughness thereto, comprises a lofty, open, fibrous web of curved continuous glass filament bundles which is impregnated with a hard thermoset resin containing abrasive particles.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: April 19, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John E. Davis, Thomas R. McAvoy