Patents by Inventor Helen O'Hara

Helen O'Hara 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).

  • Gasser composition and method of gassing
    Patent number: 7972454
    Abstract: A method of preparing a gassed water-in-oil emulsion explosives composition from a gasser solution of an inorganic nitrate, an ammonium species and an optional accelerator which is added to an emulsion explosive composition, reacts and forms gas bubbles is disclosed. The emulsion explosive composition is composed of a discontinuous aqueous phase, a continuous water immiscible organic phase, and an emulsifier. The reaction between the gasser solution and the emulsion explosive composition is such that the emulsifier does not undergo chemical attack.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: July 5, 2011
    Assignee: Orica Australia Pty Ltd.
    Inventors: Helen O'Hara, David Stow, David Edwin Yates
  • Gasser composition and method of gassing
    Publication number: 20030140995
    Abstract: A method of preparing a gassed water-in-oil emulsion explosives composition from a gasser solution of an inorganic nitrate, an ammonium species and an optional accelerator which is added to an emulsion explosive composition, reacts and forms gas bubbles is disclosed. The emulsion explosive composition is composed of a discontinuous aqueous phase, a continuous water immiscible organic phase, and an emulsifier. The reaction between the gasser solution and the emulsion explosive composition is such that the emulsifier does not undergo chemical attack.
    Type: Application
    Filed: August 27, 2001
    Publication date: July 31, 2003
    Inventors: Helen O'Hara, David Stow, David Edwin Yates