Patents by Inventor David Dakin IORWERTH
David Dakin IORWERTH 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: 20140221501Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurised canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimising the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: ApplicationFiled: April 9, 2014Publication date: August 7, 2014Applicant: BTG International Ltd.Inventors: David Dakin Iorwerth WRIGHT, Anthony David HARMAN, Nikki ROBINSON, Garry HODGES, Adil KADAR, Geoffrey D. MOGGRIDGE, Hugh VAN LIEW
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Patent number: 8734833Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurized canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimizing the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: GrantFiled: November 2, 2012Date of Patent: May 27, 2014Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Publication number: 20140107224Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: ApplicationFiled: December 16, 2013Publication date: April 17, 2014Applicant: BTG International LimitedInventors: Tariq OSMAN, Sheila Bronwen SHILTON-BROWN, David Dakin IORWERTH, Anthony David HARMAN, Timothy David BOORMAN
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Patent number: 8517975Abstract: A device and a method for generating therapeutic foam from a sclerosing solution such as polidocanol and a gas which is absorbable or dissolvable in the body comprises a disposable cassette including a liquid container and a flexible chamber containing gas, chamber being formed as a loop. Located in the loop chamber is a foam generating mesh. In use, liquid is introduced into the chamber and then the cassette is inserted into a pumping machine where it is engaged by a peristaltic pump which circulates the contents of the loop chamber through the mesh, thus creating foam. When a steady state is reached, foam may be withdrawn using a syringe via either a port or septum.Type: GrantFiled: July 9, 2012Date of Patent: August 27, 2013Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
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Publication number: 20130059923Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurised canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimising the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: ApplicationFiled: November 2, 2012Publication date: March 7, 2013Applicant: BTG INTERNATIONAL LTD.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, SR., Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Patent number: 8323677Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurized canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimizing the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: GrantFiled: April 23, 2010Date of Patent: December 4, 2012Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Publication number: 20120273977Abstract: A device and a method for generating therapeutic foam from a sclerosing solution such as polidocanol and a gas which is absorbable or dissolvable in the body comprises a disposable cassette including a liquid container and a flexible chamber containing gas, chamber being formed as a loop. Located in the loop chamber is a foam generating mesh. In use, liquid is introduced into the chamber and then the cassette is inserted into a pumping machine where it is engaged by a peristaltic pump which circulates the contents of the loop chamber through the mesh, thus creating foam. When a steady state is reached, foam may be withdrawn using a syringe via either a port or septum.Type: ApplicationFiled: July 9, 2012Publication date: November 1, 2012Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
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Patent number: 8235935Abstract: A device and a method for generating therapeutic foam from a sclerosing solution such as polidocanol and a gas which is absorbable or dissolvable in the body comprises a disposable cassette including a liquid container and a flexible chamber containing gas, chamber being formed as a loop. Located in the loop chamber is a foam generating mesh. In use, liquid is introduced into the chamber and then the cassette is inserted into a pumping machine where it is engaged by a peristaltic pump which circulates the contents of the loop chamber through the mesh, thus creating foam. When a steady state is reached, foam may be withdrawn using a syringe via either a port or septum.Type: GrantFiled: December 21, 2007Date of Patent: August 7, 2012Assignee: BTG International, LtdInventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
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Publication number: 20120095390Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: ApplicationFiled: December 9, 2011Publication date: April 19, 2012Applicant: BTG International LimitedInventors: Tariq OSMAN, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
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Patent number: 8091801Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: GrantFiled: June 18, 2009Date of Patent: January 10, 2012Assignee: BTG International LimitedInventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
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Patent number: 8048439Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurized canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimizing the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: GrantFiled: May 13, 2005Date of Patent: November 1, 2011Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew, William John Jenkins
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Publication number: 20100203171Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurised canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimising the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: ApplicationFiled: April 23, 2010Publication date: August 12, 2010Applicant: BTG International Ltd.,Inventors: David Dakin Iorwerth WRIGHT, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Patent number: 7763269Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurised canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimising the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: GrantFiled: November 17, 2004Date of Patent: July 27, 2010Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Patent number: 7731986Abstract: A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurised canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimising the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.Type: GrantFiled: November 17, 2004Date of Patent: June 8, 2010Assignee: BTG International Ltd.Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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Publication number: 20100099778Abstract: A device and a method for generating therapeutic foam from a sclerosing solution such as polidocanol and a gas which is absorbable or dissolvable in the body comprises a disposable cassette including a liquid container and a flexible chamber containing gas, chamber being formed as a loop. Located in the loop chamber is a foam generating mesh. In use, liquid is introduced into the chamber and then the cassette is inserted into a pumping machine where it is engaged by a peristaltic pump which circulates the contents of the loop chamber through the mesh, thus creating foam. When a steady state is reached, foam may be withdrawn using a syringe via either a port or septum.Type: ApplicationFiled: December 21, 2007Publication date: April 22, 2010Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
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Patent number: 7604185Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: GrantFiled: September 14, 2005Date of Patent: October 20, 2009Assignee: BTG International Ltd.Inventors: Tariq Osman, Sheila Bronwen Flynn, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
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Publication number: 20090256006Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: ApplicationFiled: June 18, 2009Publication date: October 15, 2009Inventors: Tariq Osman, Sheila-Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
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Publication number: 20080274060Abstract: A foam is described for injection treatment of varicose veins. The foam comprises a sclerosant liquid, e.g. polidocanol solution, and a gas. The gas comprises xenon, optionally together with at least one other physiologically acceptable gas which is readily absorbed in the body or blood of a patient. The gas comprises only a minimal amount of gaseous nitrogen, between 0.0001% and 0.8%.Type: ApplicationFiled: May 12, 2006Publication date: November 6, 2008Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Hugh Van Liew, Geoffrey D. Moggridge, William John Jenkins
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Publication number: 20080145401Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: ApplicationFiled: February 28, 2008Publication date: June 19, 2008Inventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
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Patent number: 7357336Abstract: Improved therapeutic sclerosing microfoams and methods and devices for making them are provided that have advantage in producing a consistent profile injectable foam with minimal input by the physician yet using high volume percentages of blood dispersible gases, thus avoiding use of potentially hazardous amounts of nitrogen.Type: GrantFiled: July 1, 2005Date of Patent: April 15, 2008Assignee: BTG International LimitedInventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman