Patents by Inventor David Anthony Akerman

David Anthony Akerman 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).

  • Fluid bed dryer filters
    Patent number: 7985270
    Abstract: A fluidised bed filter comprises a drying pan, and a filter assembly having a membrane over the pan, and a plurality of openings in the membrane. A filter bag is secured to each aperture by means of a clamping ring attached to the rim of the respective aperture, and cooperating with a clamping band within the cuff of the bag. The material of the bag is clamped between the ring and the band. The ring is covered in a cloth strip, which is folded over to produce a flap, which is stitched between the layers of a double fabric forming the membrane. The band is retained in a tunnel formed by a fold in a double fabric forming the filter bag by stitching.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: July 26, 2011
    Assignee: Madison Filter 981 Ltd.
    Inventors: Joseph Johnson, David Anthony Akerman
  • FLUID BED DRYER FILTERS
    Publication number: 20090145094
    Abstract: A fluidised bed filter comprises a drying pan, and a filter assembly having a membrane over the pan, and a plurality of openings in the membrane. A filter bag is secured to each aperture by means of a clamping ring attached to the rim of the respective aperture, and cooperating with a clamping band within the cuff of the bag. The material of the bag is clamped between the ring and the band. The ring is covered in a cloth strip, which is folded over to produce a flap, which is stitched between the layers of a double fabric forming the membrane. The band is retained in a tunnel formed by a fold in a double fabric forming the filter bag by stitching.
    Type: Application
    Filed: November 10, 2006
    Publication date: June 11, 2009
    Applicant: MADISON FILTER 981 LIMITED
    Inventors: Joseph Johnson, David Anthony Akerman
  • Halogenated and sulfonated azodyes
    Publication number: 20040111811
    Abstract: Halogenated and sulfonated azodyes provide improved resistance to fading when washed by aqueous peroxy wash liquors.
    Type: Application
    Filed: July 7, 2003
    Publication date: June 17, 2004
    Inventors: David Anthony Akerman, John Anthony Taylor