Patents by Inventor Graham Skinner
Graham Skinner 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).
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Patent number: 10247713Abstract: There is described an indicator device for indicating the passage of time, the indicator device comprising an indicator section and a barrier section adjacent thereto, said indicator section comprising: an indicator material; a substrate material; and a first adhesive layer; the indicator material and the substrate material being in the form of one or more layers; the indicator material displaying different visible properties in response to the presence or absence of a chemical agent and/or the concentration thereof; the barrier section comprising a removable barrier layer, the removable barrier layer being substantially impermeable to the chemical agent; wherein on removal of the removable barrier layer, the concentration of the chemical agent in the indicator section changes over time, effecting a visible change. The device may be used to detect the presence/absence of oxygen, water, carbon dioxide, an amine, ammonia, and/or carboxylic acids or to indicate the passage of time.Type: GrantFiled: February 27, 2014Date of Patent: April 2, 2019Assignee: Insignia Technologies LTDInventors: Erik Smyth, Graham Skinner, Deborah Allan
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Publication number: 20160011157Abstract: There is described an indicator device for indicating the passage of time, the indicator device comprising an indicator section and a barrier section adjacent thereto, said indicator section comprising: an indicator material; a substrate material; and a first adhesive layer; the indicator material and the substrate material being in the form of one or more layers; the indicator material displaying different visible properties in response to the presence or absence of a chemical agent and/or the concentration thereof; the barrier section comprising a removable barrier layer, the removable barrier layer being substantially impermeable to the chemical agent; wherein on removal of the removable barrier layer, the concentration of the chemical agent in the indicator section changes over time, effecting a visible change. The device may be used to detect the presence/absence of oxygen, water, carbon dioxide, an amine, ammonia, and/or carboxylic acids or to indicate the passage of time.Type: ApplicationFiled: February 27, 2014Publication date: January 14, 2016Inventors: Erik SMYTH, Graham SKINNER, Deborah ALLAN
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Patent number: 8955619Abstract: Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.Type: GrantFiled: October 20, 2005Date of Patent: February 17, 2015Assignee: Weatherford/Lamb, Inc.Inventors: Frederick T. Tilton, David M. Haugen, Kevin W. Smith, David J. Brunnert, Thomas F. Bailey, Tom Fuller, Roy W. Rooyakkers, Ram K. Bansal, Graham Skinner
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Patent number: 8790930Abstract: A chemical indicator having a particulate inorganic substrate, and at least one reactive dye or ink coated on and/or impregnated within the particulate inorganic substrate. Coating and/or impregnating at least one reactive dye or ink on or within a particulate inorganic substrate improves the storage stability and/or thermal stability of the at least one reactive dye or ink, which typically includes relatively unstable compounds. This allows the present indicators to be incorporated into thermoplastic polymer materials and processed conventionally while maintaining the efficacy and stability of the new indicators. The indicators provide simple, reliable, and cost effective detection means for detecting analytes such as ammonia, carbon dioxide, and oxygen, and may find use in applications such as food packaging and medical applications.Type: GrantFiled: October 14, 2010Date of Patent: July 29, 2014Assignee: University of StrathclydeInventors: Andrew Mills, Pauline Grosshans, Graham Skinner
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Publication number: 20130130399Abstract: A chemical indicator or ink, and methods for manufacture thereof, comprises at least one carbon dioxide-sensitive reactive dye which is capable of detecting changes in carbon dioxide concentration in a fluid under fluid and/or gas phase pressure of carbon dioxide above approximately (1) bar. The present chemical indicators or inks are useful in the monitoring of relatively high carbon dioxide pressure environments, such as in carbonated drinks. The present invention also relates to containers for holding a carbonated liquid, and closures therefore, comprising a carbon dioxide indicator or a carbon dioxide-sensitive ink, wherein the carbon dioxide indicator and/or the ink comprises at least one carbon dioxide-sensitive reactive dye which is capable of detecting changes in carbon dioxide concentration in a fluid under fluid and/or gas phase pressure of carbon dioxide above approximately (1) bar.Type: ApplicationFiled: May 12, 2011Publication date: May 23, 2013Inventors: Andrew Mills, Graham Skinner
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Publication number: 20120276647Abstract: A chemical indicator comprises a particulate inorganic substrate, and at least one reactive dye or ink coated on and/or impregnated within the particulate inorganic substrate. Coating and/or impregnating at least one reactive dye or ink on or within a particulate inorganic substrate improves the storage stability and/or thermal stability of the at least one reactive dye or ink, which typically comprises relatively unstable compounds. This allows the present indicators to be incorporated into thermoplastic polymer materials and processed conventionally while maintaining the efficacy and stability of the new indicators. The indicators provide simple, reliable, and cost effective detection means for detecting analytes such as ammonia, carbon dioxide, and oxygen, and may find use in applications such as food packaging and medical applications.Type: ApplicationFiled: October 14, 2010Publication date: November 1, 2012Applicant: UNIVERSITY OF STRATHCLYDEInventors: Andrew Mills, Pauline Grosshans, Graham Skinner
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Publication number: 20060157282Abstract: Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.Type: ApplicationFiled: October 20, 2005Publication date: July 20, 2006Inventors: Frederick Tilton, David Haugen, Kevin Smith, David Brunnert, Thomas Bailey, Tom Fuller, Roy Rooyakkers, Ram Bansal, Graham Skinner