Patents by Inventor Michael J. Stemmer

Michael J. Stemmer 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).

  • Two-stage air filter with multiple-layer stage and post-filter stage
    Patent number: 6156089
    Abstract: A system for circulating air which includes particles, bacterial organisms, and odoriferous material includes a fan coupled to ducting of the air circulation system for causing movement of air in a stream through the ducting; a filter holder configured to hold an air filtering device supported within the air stream; and an air filtering device for removing from the circulating air the particles, bacterial organisms, and odoriferous material. The air filtering device may include multiple filter elements having multiple layers of differing filtering materials, which may include activated carbon and potassium permanganate.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: December 5, 2000
    Assignee: Air Kontrol, Inc.
    Inventors: Michael J. Stemmer, Edward C. Sofsky
  • Forced air system air filter
    Patent number: 5922096
    Abstract: An HVAC filter having a pleated paper filter and a plastic pre-filter, the filter and pre-filter are mounted in a parallel relation in the frame. The plastic pre-filter includes a plastic mesh having a plurality of openings, and an irregular surface on the inlet side to prevent matting of filtered material.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: July 13, 1999
    Assignee: Air Kontrol, Inc.
    Inventor: Michael J. Stemmer
  • Multiple layer air filter media
    Patent number: 5858045
    Abstract: A filter media for an air filter includes at least two layers of filter material with the materials being different. The layers are joined together by a stiffening grid fabricated from a metal or plastic. Glue such as hot-melt glue is disposed on both sides of the grid to attach the sides of the grid to the respective layers. Depending upon the application, the filter media may be pleated.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: January 12, 1999
    Assignee: Air Kontrol, Inc.
    Inventors: Michael J. Stemmer, Edward C. Sofsky
  • Forced air system air filter
    Patent number: 5704953
    Abstract: An HVAC filter having a pleated paper filter and a plastic pre-filter, the filter and pre-filter are mounted in a parallel relation in the frame. The plastic pre-filter includes a plastic mesh having a plurality of openings, and an irregular surface on the inlet side to prevent matting of filtered material.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: January 6, 1998
    Assignee: Air Kontrol, Inc.
    Inventor: Michael J. Stemmer
  • Frame and pad filter system
    Patent number: 5571300
    Abstract: A filter apparatus for a reusable one piece filter frame housing and a filter media for use in a forced air ventilating system. The one piece filter frame housing having integrally formed fasteners to releasably secure a replaceable filter media. The filter frame housing further having an "I" beam structure to enhance filter frame strength. The filter frame housing also having an electrostatic charge.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: November 5, 1996
    Assignee: Air Kontrol, Inc.
    Inventor: Michael J. Stemmer