Patents Assigned to Photopharmica Limited
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Publication number: 20120302557Abstract: The present invention relates to a method of photodynamic therapy and to a method of inducing a photocytoxic effect which comprises applying to an area to be treated an effective amount of a compound of formula in which R1, R2, R3 and R4 each independently is an optionally-substituted linear, branched or cyclic hydrocarbon group, or R1 and R2 together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring or R3 and R4 together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which —NR1R2 and —NR3R4 are the same and are selected from —N(CH3)2 or —N(CH2CH3)2; and exposing the area to light to activate the compound.Type: ApplicationFiled: April 23, 2012Publication date: November 29, 2012Applicant: Photopharmica LimitedInventors: Stanley Beames BROWN, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Patent number: 8188074Abstract: The present invention relates to a composition which includes a moiety of formula wherein R1, R2, R3 and R4 each represent n-pentyl, and to a method of sterilizing a su fluid using same.Type: GrantFiled: May 12, 2008Date of Patent: May 29, 2012Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, David Ian Vernon
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Patent number: 7915254Abstract: The present invention relates to a method of photodynamic therapy and to a method of inducing a photocytoxic effect which comprises applying to an area to be treated an effective amount of a compound of formula in which R1, R2, R3 and R4 each independently is an optionally -substituted linear, branched or cyclic hydrocarbon group, or R1 and R2 together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7- membered ring or R3 and R4 together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7- membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which —NR1R2 and —NR3R4 are the same and are selected from —N(CH3)2 or —N(CH2CH3)2; and exposing the area to light to activate the compound.Type: GrantFiled: April 4, 2008Date of Patent: March 29, 2011Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, David Ian Vernon
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Patent number: 7855197Abstract: A phenothiazinium compound of Formula (I) wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells.Type: GrantFiled: June 18, 2008Date of Patent: December 21, 2010Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, David Ian Vernon
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Patent number: 7732439Abstract: The present invention relates to a pharmaceutical composition which contains a compound of formula in which R1, R2, R3 and R4 are each n-butyl, where XP? is a counteranion and P is 1, 2 or 3, together with a pharmaceutically acceptable carrier, excipient or adjuvant.Type: GrantFiled: July 10, 2008Date of Patent: June 8, 2010Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Publication number: 20090023715Abstract: A phenothiazinium compound, compositions and medicaments for use in promoting wound healing and a method for promoting wound healing or cosmetic use by applying or administering a phenothiazinium compound to a wound site or the skin, and optionally exposing the wound site or skin to light.Type: ApplicationFiled: July 21, 2008Publication date: January 22, 2009Applicant: Photopharmica LimitedInventors: Stanley Beams Brown, Cassandra Clare O'Grady
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Publication number: 20080312219Abstract: The present invention relates to a phenothiazinium compound of Formula (I): wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells. The invention also relates to compositions comprising the compounds of Formula I, to selected compounds of Formula I, use of the compounds of Formula I as medicaments and as a PDT agent or a photodiagnostic agent, a conjugate or composite formed between a compound of Formula I and a polymer; and to a method for sterilising fluids in which the fluid is passed over the conjugate or composite whilst it is illuminated.Type: ApplicationFiled: May 12, 2008Publication date: December 18, 2008Applicant: PHOTOPHARMICA LIMITEDInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Publication number: 20080275033Abstract: A phenothiazinium compound of Formula (I) wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells.Type: ApplicationFiled: June 18, 2008Publication date: November 6, 2008Applicant: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Publication number: 20080268033Abstract: The present invention relates to a phenothiazinium compound of Formula (I): wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells. The invention also relates to compositions comprising the compounds of Formula I, to selected compounds of Formula I, use of the compounds of Formula I as medicaments and as a PDT agent or a photodiagnostic agent, a conjugate or composite formed between a compound of Formula I and a polymer; and to a method for sterilising fluids in which the fluid is passed over the conjugate or composite whilst it is illuminated.Type: ApplicationFiled: July 10, 2008Publication date: October 30, 2008Applicant: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Publication number: 20080261960Abstract: The present invention relates to a phenothiazinium compound of Formula (I): wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells. The invention also relates to compositions comprising the compounds of Formula I, to selected compounds of Formula I, use of the compounds of Formula I as medicaments and as a PDT agent or a photodiagnostic agent, a conjugate or composite formed between a compound of Formula I and a polymer; and to a method for sterilising fluids in which the fluid is passed over the conjugate or composite whilst it is illuminated.Type: ApplicationFiled: April 4, 2008Publication date: October 23, 2008Applicant: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Patent number: 7407948Abstract: Phonoselenazinium compounds of Formula (1): and their use in photodynamic therapy (PDT), particularly as anti-infectives, as anti-cancer agents, and as sterilising agents both for direct use and in combination with a polymer, wherein: A and B are each independently selected from:Type: GrantFiled: March 20, 2007Date of Patent: August 5, 2008Assignee: Photopharmica LimitedInventors: John Griffiths, Stephen Anthony Gorman, Andrea Bell
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Patent number: 7407953Abstract: A phenothiazinium compound, compositions and medicaments for use in promoting wound healing and a method for promoting wound healing or cosmetic use by applying or administering a phenothiazinium compound of Formula (1) to a wound site or the skin, and optionally exposing the wound site or skin to light.Type: GrantFiled: March 20, 2007Date of Patent: August 5, 2008Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Cassandra Clare O'Grady
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Patent number: 7371744Abstract: A phenothiazinium compound of Formula (I): wherein: A and B each independently is in which R? and R? each independently is a linear, branched or cyclic hydrocarbon group, or R? and R? together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where XP? is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either —N(CH3)2 or —N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells.Type: GrantFiled: November 26, 2003Date of Patent: May 13, 2008Assignee: Photopharmica LimitedInventors: Stanley B. Brown, Cassandra C. O'Grady, John Griffiths, Kirste J. Mellish, David I. Vernon
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Patent number: 7276494Abstract: A compound for use as a photosensitiser in PDT, in photochemical internalisation in the production of a cancer vaccine or in the diagnosis or detection of medical conditions, the compound having a photosensitising chromophoric system, a sulphonamido functionality and a carboxy functionality. The compounds used in the present invention are photosensitisers in PDT in vivo, and show phototoxic activity in vitro. The compounds are used to treat pre-cancerous conditions, cancer, ophthalmological disease, vascular problems, arteriosclerosis and restenosis and autoimmune diseases, skin diseases and other benign conditions, and for anti-microbial treatments.Type: GrantFiled: March 21, 2003Date of Patent: October 2, 2007Assignee: Photopharmica LimitedInventors: Stanley Beames Brown, Andrea Lucille Bell, John Griffiths, Jack Schofield
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Publication number: 20040147508Abstract: The present invention relates to a phenothiazinium compound of Formula (I): 1Type: ApplicationFiled: November 26, 2003Publication date: July 29, 2004Applicant: PHOTOPHARMICA LIMITEDInventors: Stanley Beames Brown, Cassandra Claire O'Grady, John Griffiths, Kirste Joanne Mellish, Richard George Tunstall, David John Howard Roberts, David Ian Vernon
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Publication number: 20030180224Abstract: According to the present invention there is provided a compound for use as a photosensitiser in PDT, in photochemical internalisation in the production of a cancer vaccine or in the diagnosis or detection of medical conditions, the compound having a photosensitising chromophoric system, a sulphonamido functionality and a carboxy functionality.Type: ApplicationFiled: March 21, 2003Publication date: September 25, 2003Applicant: PHOTOPHARMICA LIMITEDInventors: Stanley Beames Brown, Andrea Lucille Bell, John Griffiths, Jack Schofield