Patents by Inventor Ian Johnstone

Ian Johnstone 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).

  • Patent number: 6986393
    Abstract: An aerator plug-core cleaning system for ground surface collection of turf cores extracted from a turf core-aerating apparatus. The core-cleaning system comprises a core-cleaner that primarily attaches to either a walk-behind or tractor pulled aerator machine. The core-cleaner entraps and pushes the extracted cores along behind the core-aeration machine until being lifted in about a vertical manner by secondary attachment to a rear raise-able portion of the core-aeration machine at which point the cores are left in a pile for disposal.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: January 17, 2006
    Inventors: Donald F. Johnston, Jr., Andrew Johnston, Ian Johnston
  • Patent number: 6660103
    Abstract: A method of cleaning ink jet printheads without rendering the printheads inoperative by soaking the printheads in a cleaning solution of acetone and n-methyl-2-pyrolidine, and then flushing the printhead with a gas, such as air. The solution is made of about 70% acetone and about 30% n-methyl-2-pyrolidine by weight.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: December 9, 2003
    Assignee: VUTEk, Inc.
    Inventors: Ian Johnston, Greg Sinchar
  • Patent number: 6505437
    Abstract: A method of destroying or controlling unwanted vegetation and agricultural pests is disclosed. The method produces a jet stream of treatment fluid, being mixed combustion gas and superheated or dry steam for application to thermally destroy unwanted vegetation and posts. The method involves the use of a hydrocarbon burner and a water source.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: January 14, 2003
    Assignee: Origin Energy LPG Limited
    Inventors: Ian Johnstone, Robert Smith
  • Patent number: 6257875
    Abstract: The invention relates to an LPG combusting burner device for flaming and flame cultivation purposes and an improved hand-held torch that may incorporate such burner device. The burner device includes a primary burner (14) having at least one fuel delivery nozzle or jet (80) arranged within an open combustion chamber (71) defined within a burner skirt (70) such as to direct a stream of fuel towards a flame delivery opening of the skirt (70), and a vaporiser (18) located in heat exchanging proximity to the primary burner (14) and having a pressurization chamber with an inlet for liquid LPG fuel and an outlet for gaseous LPG fuel, the inlet being arranged to be in fluid communication with a source of pressurized LPG and the other being in communication with the nozzle of the primary burner.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: July 10, 2001
    Assignee: Origin Energy LPG Limited
    Inventors: Ian Johnstone, Robert Smith