Patents Assigned to Andreae Filters, Inc.
  • Filter apparatus and methods
    Patent number: 6790397
    Abstract: The invention provides a filter apparatus for removing air entrained particles comprising a pleated filter media. A first media member has a plurality of alternating upstream and downstream folds and a wall connecting the folds. A pair of slits forms an aperture and a hinged pleat. A second media member matingly attaches to the first media member.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: September 14, 2004
    Assignee: Andreae Filters, Inc.
    Inventors: C. Shaun Richerson, Robert Andreae
  • Filter apparatus and methods
    Patent number: 6585793
    Abstract: The invention provides a filter apparatus for removing air entrained particles comprising a pleated filter media. A first media member has a plurality of alternating upstream and downstream folds and a wall connecting the folds. A pair of slits forms an aperture and a hinged pleat. A second media member matingly attaches to the first media member.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: July 1, 2003
    Assignee: Andreae Filters, Inc.
    Inventors: C. Shaun Richerson, Robert Andreae
  • Filter apparatus
    Patent number: 6328778
    Abstract: The invention provides a filter apparatus for removing air entrained particles comprising a collapsible filter media. The filter media has a periphery. A continuous frame extends around and attaches to the periphery of the filter media whereby the filter media and attached frame together can be lengthwise collapsed.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: December 11, 2001
    Assignee: Andreae Filters, Inc.
    Inventors: Shaun Richerson, Francois Lautens