Patents by Inventor Phil Algreen

Phil Algreen 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).

  • Groundwater control system and method
    Patent number: 8403596
    Abstract: A groundwater control system and method for regulating the level of groundwater in an agricultural field according to selected criteria including a drainage tile line having a water flow regulator that is computer controlled through a communications link in response to the selected criteria to provide a water table profile for the field.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: March 26, 2013
    Inventors: Charlie J. Schafer, Britt Dinsdale, William Littler, IV, Phil Algreen
  • Groundwater control system with purity sensor and method
    Patent number: 8342775
    Abstract: A groundwater control system and method for regulating the level of groundwater in an agricultural field according to selected criteria concerning the purity of the groundwater including a drainage tile line having a water flow regulator that is computer controlled through a communications link in response to the selected criteria.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: January 1, 2013
    Assignee: Agri Drain Corporation
    Inventors: Charlie J. Schafer, Phil Algreen
  • Groundwater control system with purity sensor and method
    Publication number: 20060013652
    Abstract: A groundwater control system and method for regulating the level of groundwater in an agricultural field according to selected criteria concerning the purity of the groundwater including a drainage tile line having a water flow regulator that is computer controlled through a communications link in response to the selected criteria.
    Type: Application
    Filed: May 13, 2005
    Publication date: January 19, 2006
    Inventors: Charlie Schafer, Phil Algreen
  • Groundwater control system and method
    Publication number: 20060002763
    Abstract: A groundwater control system and method for regulating the level of groundwater in an agricultural field according to selected criteria including a drainage tile line having a water flow regulator that is computer controlled through a communications link in response to the selected criteria to provide a water table profile for the field.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 5, 2006
    Inventors: Charlie Schafer, Britt Dinsdale, William Littler, Phil Algreen