Patents Assigned to BTG International Ltd.
  • Patent number: 10472100
    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 8, 2015
    Date of Patent: November 12, 2019
    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: 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
  • Patent number: 8703827
    Abstract: A foam for the treatment of varicose veins is disclosed, comprising a sclersosant solution, e.g. polidocanol, foamed with a gas mixture which includes greater than 41% of a lipid soluble gas such as xenon. The aim is to provide a foam which may be injected into a varicose vein in large quantities because the gas component is dissipated quickly after the foam has acted on the varicose vein.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: April 22, 2014
    Assignee: BTG International Ltd.
    Inventor: William John Jenkins
  • 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
  • Patent number: 8512680
    Abstract: The placing of a drug that is suitable for parenteral administration on bubbles formed with sterile gases produces an exponential increase in its active surface area with a decrease in the diameter of the bubble, modifies the kinetics of its distribution and, thanks to its micronization, increases its therapeutic effect. Furthermore, the echogenicity of the bubbles allows us to follow them on ultrasound after their injection, so that we can visualise the medicament and, thanks to its steerability, can direct it to the selected site or prevent it from reaching undesired areas. This pharmaceutical form is of interest in the treatment of diseases that require a greater local action of the injected drugs than can be achieved with the pharmaceutical forms in current use.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: August 20, 2013
    Assignee: BTG International Ltd.
    Inventor: María Antonia García-Olmedo Dominguez
  • 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
  • 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: 20110275640
    Abstract: The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: (where, R1 and R2 are H or alkyl; Z1 and Z2 are H, alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z4 and Z5 are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
    Type: Application
    Filed: May 10, 2011
    Publication date: November 10, 2011
    Applicant: BTG International Ltd.
    Inventors: Masaki Meguro, Tomiichiro Oda, Yasuhiro Nakagami, Shinji Marumoto, Kazuo Koyama, Isao Kaneko
  • Publication number: 20110275641
    Abstract: The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: (where, R1 and R2 are H or alkyl; Z1 and Z2 are H, alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z4 and Z5 are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
    Type: Application
    Filed: May 10, 2011
    Publication date: November 10, 2011
    Applicant: BTG International Ltd.
    Inventors: Masaki Meguro, Tomiichiro Oda, Yasuhiro Nakagami, Shinji Marumoto, Kazuo Koyama, Isao Kaneko
  • 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
  • Patent number: 8003645
    Abstract: The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: (where, R1 and R2 are H or alkyl; Z1 and Z2 are H, alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z4 and Z5 are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: August 23, 2011
    Assignee: BTG International Ltd.
    Inventors: Masaki Meguro, Tomichiro Oda, Yasuhiro Nakagami, Shinji Marumoto, Kazuo Koyama, Isao Kaneko
  • 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: 20090286794
    Abstract: The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: (where, R1 and R2 are H or alkyl; Z1 and Z2 are H, alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z4 and Z5 are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
    Type: Application
    Filed: July 27, 2009
    Publication date: November 19, 2009
    Applicant: BTG International Ltd.
    Inventors: Masaki Meguro, Tomiichiro Oda, Yasuhiro Nakagami, Shinji Marumoto, Kazuo Koyama, Isao Kaneko
  • Publication number: 20090286809
    Abstract: The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: (where, R1 and R2 are H or alkyl; Z1 and Z2 are H, alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z4 and Z5 are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
    Type: Application
    Filed: July 27, 2009
    Publication date: November 19, 2009
    Applicant: BTG International Ltd.
    Inventors: Masaki Meguro, Tomiichiro Oda, Yasuhiro Nakagami, Shinji Marumoto, Kazuo Koyama, Isao Kaneko
  • 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
  • Patent number: RE40640
    Abstract: Injectable microfoam for scleroteraphy. The sclerotherapy of varices is based on the injection of liquid substances capable of suppressing them. The present invention relates to the preparation of sclerosing substances in the form of a microfoam. The microfoam is prepared with sclerosing agents, and is then injected in the vein to be treated, so that the microfoam displaces the blood contained in the vein and provides for the contact of the sclerosing agent with the vascular endothelium, with a predetermined known concentration and during a controllable time.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: February 17, 2009
    Assignee: BTG International Ltd.
    Inventors: Juan Cabrera Garrido, Juan Cabrera Garcia-Olmedo