Patents by Inventor Melissa A. Checky

Melissa A. Checky 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).

  • End of service life indicating systems for layered filter cartridges
    Patent number: 9751038
    Abstract: Layered filtered cartridge systems with an End of Service Life Indicating system include a filter cartridge that includes filter media. The filter media includes a multi-layer construction, of a first sorbent layer, a second sorbent layer, and a sensing element adjacent to the first and second sorbent layers such that an indicating element of the sensing element is located at the interface between the first and second sorbent layers. The first sorbent layer has a higher adsorption capacity and/or higher adsorption rate than the second sorbent layer. The sensing element indicates the passage of an adsorption wavefront through the filter cartridge.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: September 5, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin A. Frankel, J. Christopher Thomas, Melissa A. Checky, Maria L. Zelinsky, Denise L. Goddard
  • End of Service Life Indicating Systems For Layered Filter Cartridges
    Publication number: 20160030877
    Abstract: Layered filtered cartridge systems with an End of Service Life Indicating system include a filter cartridge that includes filter media. The filter media includes a multi-layer construction, of a first sorbent layer, a second sorbent layer, and a sensing element adjacent to the first and second sorbent layers such that an indicating element of the sensing element is located at the interface between the first and second sorbent layers. The first sorbent layer has a higher adsorption capacity and/or higher adsorption rate than the second sorbent layer. The sensing element indicates the passage of an adsorption wavefront through the filter cartridge.
    Type: Application
    Filed: March 7, 2014
    Publication date: February 4, 2016
    Inventors: Kevin A. Frankel, J. Christopher Thomas, Melissa A. Checky, Maria L. Zelinsky, Denise L. Goddard