Patents by Inventor David Whitfield
David Whitfield 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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Publication number: 20250381571Abstract: A water treatment unit for improving the quality of water in a water system comprises a container having an inlet and an outlet configured to allow water to flow into and out of the container, respectively. The water treatment unit comprises at least one magnet, at least one sacrificial anode, and a filter element. The at least one magnet is configured to attract ferrous particles and retain ferrous particles to remove the ferrous particles from the water flowing through the container. The at least one sacrificial anode is configured to provide anodic protection and scavenge oxygen from the water flowing through the container. The filter element is configured to remove detritus from the water flowing out of the container. The at least one magnet and the at least one sacrificial anode are located in the container. The filter element is located outside of the container downstream of the outlet.Type: ApplicationFiled: June 12, 2025Publication date: December 18, 2025Inventor: David Whitfield
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Patent number: 9839087Abstract: A lighting system (1) has a first lighting circuit (2) configured to provide a first predetermined level of lighting intensity. The first lighting circuit (2) is configured to receive power from a mains electricity supply (3) or from a battery source (4) if the mains supply is unavailable. The first lighting circuit (2) is connected to at least one first Light source (5) and configured, when actuated, to provide lighting at the first predetermined level of lighting intensity. At this time, the first light source is in either an on or off state or a level of light required to raise ambient light level above a predetermined level. The system (1) further has a second lighting circuit (13) configured to provide lighting at least a second predetermined level of lighting intensity. The second lighting circuit (13) is configured to receive power from the mains electricity supply (3) and is connected to at least one second light source (14).Type: GrantFiled: January 18, 2012Date of Patent: December 5, 2017Assignee: Enlighten Australia PTY LTDInventor: David Whitfield
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Patent number: 8881477Abstract: A ceiling frame system 1 comprises a plurality of frame members 1 configured to depend from the ceiling. The frame members 1 include one or more service conduits 11 and are configured to be interconnected to one or more other frame members 1 to interconnect said service conduits 11 between predetermined interconnected frame members 1. The services are accessible at one or more predetermined locations along the length of each frame member 1. A ceiling frame member 1 is also provided.Type: GrantFiled: August 24, 2010Date of Patent: November 11, 2014Assignee: Enlighten Australia Pty LtdInventor: David Whitfield
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Publication number: 20140139019Abstract: A lighting system (1) has a first lighting circuit (2) configured to provide a first predetermined level of lighting intensity. The first lighting circuit (2) is configured to receive power from a mains electricity supply (3) or from a battery source (4) if the mains supply is unavailable. The first lighting circuit (2) is connected to at least one first Light source (5) and configured, when actuated, to provide lighting at the first predetermined level of lighting intensity. At this time, the first light source is in either an on or off state or a level of light required to raise ambient light level above a predetermined level. The system (1) further has a second lighting circuit (13) configured to provide lighting at least a second predetermined level of lighting intensity. The second lighting circuit (13) is configured to receive power from the mains electricity supply (3) and is connected to at least one second light source (14).Type: ApplicationFiled: January 18, 2012Publication date: May 22, 2014Applicant: ENLIGHTEN AUSTRALIA PTY LTDInventor: David Whitfield
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Publication number: 20130189245Abstract: The present invention relates to the use of toxoids prepared using a-dicarbonyl toxoiding reagents such as glyoxal, butanedione and phenylglyoxal. The toxoids may be prepared with low concentrations of toxoiding reagent and in short periods of time, often in as few as 24 hours, making the toxoiding reagents particularly advantageous when compared with traditional formaldehyde toxoiding. Toxoids prepared using dicarbonyl reagents such as phenylglyoxal are described and claimed as are pharmaceutical and vaccine compositions comprising the toxoids, methods of treatment using such compositions and antibodies generated by immunisation with the toxoid and methods of treatment using the antibodies so prepared or fragments of such antibodies.Type: ApplicationFiled: July 18, 2011Publication date: July 25, 2013Inventors: Lucy Jane Cork, Gary John Phillips, Gareth David Griffiths, David Whitfield
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Publication number: 20120204506Abstract: A ceiling frame system 1 comprises a plurality of frame members 1 configured to depend from the ceiling. The frame members 1 include one or more service conduits 11 and are configured to be interconnected to one or more other frame members 1 to interconnect said service conduits 11 between predetermined interconnected frame members 1. The services are accessible at one or more predetermined locations along the length of each frame member 1. A ceiling frame member 1 is also provided.Type: ApplicationFiled: August 24, 2010Publication date: August 16, 2012Applicant: ENLIGHTEN AUSTRALIA PTY LTDInventor: David Whitfield
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Patent number: 7618625Abstract: A pharmaceutical composition comprising (i) a first specific binding agent selected from an antibody or a large binding fragment of an antibody which specifically binds a target toxin, and (ii) a second specific binding agent which comprises a small binding fragment of an antibody which binds said toxin. The compositions are used in the treatment of toxin poisoning, for example following exposure to toxins such as Botulinum toxins.Type: GrantFiled: June 3, 2004Date of Patent: November 17, 2009Assignee: The Sectetary of State for DefenceInventors: Jane Louise Holley, Carl Nicholas Mayers, David Whitfield, Timothy John Gilby Brooks
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Publication number: 20070036805Abstract: A pharmaceutical composition comprising (i) a first specific binding agent selected from an antibody or a large binding fragment of an antibody which specifically binds a target toxin, and (ii) a second specific binding agent which comprises a small binding fragment of an antibody which binds said toxin. The compositions are used in the treatment of toxin poisoning, for example following exposure to toxins such as Botulinum toxins.Type: ApplicationFiled: June 3, 2004Publication date: February 15, 2007Inventors: Jane Holley, Carl Mayers, David Whitfield, Timothy Brooks
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Patent number: 6428330Abstract: An extender for use in with a cascade stack of network devices comprises an electronic circuit which has three ports, and circuit connections coupling each of the three ports to each of the other two ports; port connectors for each port; a two-part housing of which a first part has an end wall apertured for the protrusion of a first and a second of the connectors and a second part has an end wall apertured for the protrusion of a third of the port connectors; and screw fixings for securing the housing parts together.Type: GrantFiled: September 5, 2001Date of Patent: August 6, 2002Assignee: 3Com CorporationInventors: Alan R Poulter, Richard N Bayfield, Paul J Moran, Quang T Tran, Sharon L Wiles, David Whitfield
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Patent number: D466095Type: GrantFiled: September 28, 2001Date of Patent: November 26, 2002Assignee: 3COM CorporationInventors: Alan R Poulter, Richard N Bayfield, Paul J Moran, Quang T Tran, Sharon L Wiles, David Whitfield