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).

  • Publication number: 20140221501
    Abstract: 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: Application
    Filed: April 9, 2014
    Publication date: August 7, 2014
    Applicant: BTG International Ltd.
    Inventors: David Dakin Iorwerth WRIGHT, Anthony David HARMAN, Nikki ROBINSON, Garry HODGES, Adil KADAR, Geoffrey D. MOGGRIDGE, Hugh VAN LIEW
  • Patent number: 8734833
    Abstract: 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: Grant
    Filed: November 2, 2012
    Date of Patent: May 27, 2014
    Assignee: BTG International Ltd.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Publication number: 20140107224
    Abstract: 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: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Applicant: BTG International Limited
    Inventors: Tariq OSMAN, Sheila Bronwen SHILTON-BROWN, David Dakin IORWERTH, Anthony David HARMAN, Timothy David BOORMAN
  • Patent number: 8517975
    Abstract: 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: Grant
    Filed: July 9, 2012
    Date of Patent: August 27, 2013
    Assignee: BTG International Ltd.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
  • Publication number: 20130059923
    Abstract: 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: Application
    Filed: November 2, 2012
    Publication date: March 7, 2013
    Applicant: BTG INTERNATIONAL LTD.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, SR., Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Patent number: 8323677
    Abstract: 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: Grant
    Filed: April 23, 2010
    Date of Patent: December 4, 2012
    Assignee: BTG International Ltd.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Publication number: 20120273977
    Abstract: 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: Application
    Filed: July 9, 2012
    Publication date: November 1, 2012
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
  • Patent number: 8235935
    Abstract: 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: Grant
    Filed: December 21, 2007
    Date of Patent: August 7, 2012
    Assignee: BTG International, Ltd
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
  • Publication number: 20120095390
    Abstract: 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: Application
    Filed: December 9, 2011
    Publication date: April 19, 2012
    Applicant: BTG International Limited
    Inventors: Tariq OSMAN, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
  • Patent number: 8091801
    Abstract: 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: Grant
    Filed: June 18, 2009
    Date of Patent: January 10, 2012
    Assignee: BTG International Limited
    Inventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
  • Patent number: 8048439
    Abstract: 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: Grant
    Filed: May 13, 2005
    Date of Patent: November 1, 2011
    Assignee: 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
  • Publication number: 20100203171
    Abstract: 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: Application
    Filed: April 23, 2010
    Publication date: August 12, 2010
    Applicant: BTG International Ltd.,
    Inventors: David Dakin Iorwerth WRIGHT, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Patent number: 7763269
    Abstract: 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: Grant
    Filed: November 17, 2004
    Date of Patent: July 27, 2010
    Assignee: BTG International Ltd.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Patent number: 7731986
    Abstract: 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: Grant
    Filed: November 17, 2004
    Date of Patent: June 8, 2010
    Assignee: BTG International Ltd.
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
  • Publication number: 20100099778
    Abstract: 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: Application
    Filed: December 21, 2007
    Publication date: April 22, 2010
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Garry Hodges, David John Targell, Mark Simpson Yeoman, Jeremy Francis Donnan
  • Patent number: 7604185
    Abstract: 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: Grant
    Filed: September 14, 2005
    Date of Patent: October 20, 2009
    Assignee: BTG International Ltd.
    Inventors: Tariq Osman, Sheila Bronwen Flynn, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
  • Publication number: 20090256006
    Abstract: 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: Application
    Filed: June 18, 2009
    Publication date: October 15, 2009
    Inventors: Tariq Osman, Sheila-Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
  • Publication number: 20080274060
    Abstract: 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: Application
    Filed: May 12, 2006
    Publication date: November 6, 2008
    Inventors: David Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Hugh Van Liew, Geoffrey D. Moggridge, William John Jenkins
  • Publication number: 20080145401
    Abstract: 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: Application
    Filed: February 28, 2008
    Publication date: June 19, 2008
    Inventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman
  • Patent number: 7357336
    Abstract: 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: Grant
    Filed: July 1, 2005
    Date of Patent: April 15, 2008
    Assignee: BTG International Limited
    Inventors: Tariq Osman, Sheila Bronwen Shilton-Brown, David Dakin Iorwerth Wright, Anthony David Harman, Timothy David Boorman