Patents by Inventor Michael Chadwell

Michael Chadwell 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).

  • Particulate oxidation catalyst with dual pressure-drop sensors
    Patent number: 9046026
    Abstract: A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (?P1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (?P2) to measure pressure differences across the last POC element. During operation of the engine, ?P1 is monitored to determine whether its POC elements require active regeneration, and ?P2 is separately monitored to determine whether its (the last) POC element requires active regeneration.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: June 2, 2015
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Rijing Zhan, Phillip A. Weber, Michael A. Chadwell
  • Particulate Oxidation Catalyst With Dual Pressure-Drop Sensors
    Publication number: 20130327019
    Abstract: A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (?P1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (?P2) to measure pressure differences across the last POC element. During operation of the engine, ?P1 is monitored to determine whether its POC elements require active regeneration, and ?P2 is separately monitored to determine whether its (the last) POC element requires active regeneration.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 12, 2013
    Applicant: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Rijing Zhan, Phillip A. Weber, Michael A. Chadwell
  • Decorative artificial marijuana wreath
    Patent number: D836484
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: December 25, 2018
    Assignee: Wreefs, LLC
    Inventors: Michael Chadwell, Ann Marie Chadwell