Patents by Inventor Murugappan Subbarayan

Murugappan Subbarayan 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).

  • Landfill and method of decomposing refuse in a landfill
    Patent number: 7699563
    Abstract: Landfills and their methods of operation are disclosed. Through the controlled introduction of septage into a wet cell having a refuse layer, refuse decomposes faster to achieve additional landfill space.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: April 20, 2010
    Assignee: Virdis Waste Control, LLC
    Inventors: Murugappan Subbarayan, John Lawrence O'Keefe, Te-Yang Soong, Jan M. O'Keefe
  • Landfill and method of decomposing refuse in a landfill
    Publication number: 20080181726
    Abstract: Landfills and their methods of operation are disclosed. Through the controlled introduction of septage into a wet cell having a refuse layer, refuse decomposes faster to achieve additional landfill space.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 31, 2008
    Inventors: Murugappan Subbarayan, John Lawrence O'Keefe, Te-Yang Soong, Jan M. O'Keefe
  • Landfills and methods of operating a landfill
    Patent number: 7347648
    Abstract: Landfills and their methods of operation are disclosed. Through the controlled introduction of septage into solid municipal waste, refuse decomposes faster to achieve additional landfill space. A business method of operating the landfill is also disclosed.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: March 25, 2008
    Assignee: Viridis Waste Control, LLC
    Inventors: Murugappan Subbarayan, John Lawrence O'Keefe, Te-Yang Soong, Jan M. O'Keefe
  • Landfills and methods of operating a landfill
    Publication number: 20060222463
    Abstract: Landfills and their methods of operation are disclosed. Through the controlled introduction of septage into solid municipal waste, refuse decomposes faster to achieve additional landfill space. A business method of operating the landfill is also disclosed.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 5, 2006
    Inventors: Murugappan Subbarayan, John O'Keefe, Te-Yang Soong