Patents by Inventor Douglas M. Ruthven

Douglas M. Ruthven 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).

  • ZEOLITE COMPOSITE MATERIALS FOR WASTE ODOR CONTROL
    Publication number: 20120114736
    Abstract: A composite material for environmental odor control is useful in controlling odors from waste, for example, as an alternative daily cover for landfills and in composting applications. The composite material includes a fiber web and a zeolite containing metals to promote absorption of odorous gas.
    Type: Application
    Filed: January 18, 2012
    Publication date: May 10, 2012
    Applicant: University of Maine System Board of Trustees
    Inventors: Karl Duncan BISHOP, Michael A. BILODEAU, Susan G. MACKAY, Douglas M. RUTHVEN
  • Zeolite composite materials for waste odor control
    Patent number: 8100605
    Abstract: A composite material for environmental odor control is useful in controlling odors from waste, for example, as an alternative daily cover for landfills and in composting applications. The composite material includes a fiber web and a zeolite containing metals to promote absorption of odorous gas.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: January 24, 2012
    Assignee: University of Maine System Board of Trustees
    Inventors: Karl Duncan Bishop, Michael A. Bilodeau, Susan G. Mackay, Douglas M. Ruthven
  • ZEOLITE COMPOSITE MATERIALS FOR WASTE ODOR CONTROL
    Publication number: 20080293614
    Abstract: A composite material for environmental odor control is useful in controlling odors from waste, for example, as an alternative daily cover for landfills and in composting applications. The composite material includes a fiber web and a zeolite containing metals to promote absorption of odorous gas.
    Type: Application
    Filed: May 21, 2008
    Publication date: November 27, 2008
    Applicant: UNIVERSITY OF MAINE SYSTEM BOARD OF TRUSTEES
    Inventors: Karl Duncan BISHOP, Michael A. BILODEAU, Susan G. MACKAY, Douglas M. RUTHVEN