Patents by Inventor Nathaniel P. Langford

Nathaniel P. Langford 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: 5855715
    Abstract: A paint applicator has a paint-impervious backing such as a cylindrical core to which is adhered a resilient reticulated reservoir such as an open-cell polyurethane foam. Covering the reservoir is a flexible reticulated metering layer that is not bonded to the reservoir except at crossing points of the reticulations. The applicator better releases paint and is more easily cleaned as compared to prior paint applicators having pile fabric coverings. In addition to paint rolls, other types of paint applicators such as paint pads and paint mittens can employ the same composite of a reticulated reservoir and reticulated metering layer.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: January 5, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nathaniel P. Langford, Daniel H. Bishop
  • Patent number: 5518661
    Abstract: A paint stripper composition comprising benzyl alcohol or a derivative thereof and a chlorinated alkane.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: May 21, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nathaniel P. Langford, David W. Erismann
  • Patent number: 4539006
    Abstract: Composition useful for treating leather, textiles, and cellulosic materials to impart a high degree of water and oil repellancy thereto. The composition contains a fluorochemical compound having (a) a fluoroaliphatic moiety, (b) an aliphatic moiety, and (c) an organic group which connects moiety (a) and moiety (b).
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: September 3, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Nathaniel P. Langford
  • Patent number: 4066589
    Abstract: The invention relates to novel complexes formed by mixing together in an aqueous medium a zwitterionic polymer and a fluorocarbon acid compound. The complex can be formulated with conventional cosmetic extending media to provide solvent-repellent, skin-protective compositions.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: January 3, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nathaniel P. Langford, Edward W. Perrault