Patents by Inventor Lester Sampath
Lester Sampath 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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Patent number: 8436050Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin. Hydroalcoholic gel composition containing alcohol, water, hydrogel, and emollient or emulsifier, wherein the composition has a viscosity of below 2000 centipoises at between 20 and 40° C.Type: GrantFiled: February 24, 2004Date of Patent: May 7, 2013Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Trupti A. Gaonkar, Lauser Caraos, Lester Sampath
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Patent number: 8293802Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin. Hydroalcoholic gel composition containing alcohol, water, hydrogel, and emollient or emulsifier, wherein the composition has a viscosity of below 2000 centipoises at between 20 and 40° C.Type: GrantFiled: August 10, 2010Date of Patent: October 23, 2012Assignee: The Trustees of Columbia UniversityInventors: Shanta Modak, Trupti A. Gaonkar, Lauserpina Algenio Caraos, Lester Sampath
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Publication number: 20100305211Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin. Hydroalcoholic gel composition containing alcohol, water, hydrogel, and emollient or emulsifier, wherein the composition has a viscosity of below 2000 centipoises at between 20 and 40° C.Type: ApplicationFiled: August 10, 2010Publication date: December 2, 2010Inventors: Shanta Modak, Trupti A. Gaonkar, Lauser Caraos, Lester Sampath
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Publication number: 20080075761Abstract: The present disclosure invention relates to medical devices treated with a solution comprising one or more solvents and a combination of chlorhexidine free base and a water-soluble chlorhexidine salt in a weight/weight ratio of between about 1:1 to about 1:5, preferably about 1:1.Type: ApplicationFiled: November 28, 2007Publication date: March 27, 2008Inventors: Shanta Modak, Lester Sampath
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Publication number: 20050192547Abstract: The present invention relates to compositions comprising a combination of one or more antiseptic and an antibiotic. It is based, at least in part, on the discovery that such combinations tend to deter the formation of antibiotic-resistant organisms. In preferred, nonlimiting embodiments of the invention, the antibiotic is minocycline and the antiseptic is a chlorhexidine compound, triclosan, or benzalkonium chloride, and in particular embodiments, a silver salt or a bismuth salt is added. Examples of specific, nonlimiting embodiments of the invention include combinations of (i) minocycline, triclosan, and a bismuth salt; (ii) minocycline, a chlorhexidine compound, and a bismuth salt; and (iii) minocycline, benzalkonium chloride, and a bismuth salt. The present invention further provides for articles, such as, but not limited to, medical articles, which have been treated with or which otherwise comprise a combination of antiseptic and antibiotic.Type: ApplicationFiled: July 30, 2003Publication date: September 1, 2005Inventors: Shanta Modak, Suhas Tambe, Lester Sampath
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Publication number: 20050124725Abstract: The present invention relates to polymeric medical articles comprising combinations of triclosan and silver-containing compounds. It is based, at least in part, on the discovery that these agents act synergistically, thereby permitting the use of relatively low levels of both agents. While it had been previously found that triclosan can be particularly useful when used in conjunction with chlorhexidine, it has been further discovered that medical articles having suitable antimicrobial properties may be prepared, according to the present invention, which contain triclosan without chlorhexidine. Such medical articles offer the advantage of preventing or inhibiting infection while avoiding undesirable adverse reactions to chlorhexidine by individuals that may have sensitivity to chlorhexidine.Type: ApplicationFiled: January 6, 2005Publication date: June 9, 2005Inventors: Shanta Modak, Lester Sampath
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Patent number: 6872195Abstract: The present invention relates to polymeric medical articles comprising the anti-infective agents chlorhexidine and triclosan. It is based, at least in part, on the discovery that the synergistic relationship between these compounds permits the use of relatively low levels of both agents, and on the discovery that effective antimicrobial activity may be achieved when these compounds are comprised in either hydrophilic or hydrophobic polymers. It is also based on the discovery that chlorhexidine free base and triclosan, used together, are incorporated into polymeric medical articles more efficiently. Medical articles prepared according to the invention offer the advantage of preventing or inhibiting infection while avoiding undesirably high release of anti-infective agent, for example into the bloodstream of a subject.Type: GrantFiled: August 25, 2003Date of Patent: March 29, 2005Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Lester Sampath
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Patent number: 6846846Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin.Type: GrantFiled: October 23, 2001Date of Patent: January 25, 2005Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Trupti A. Gaonkar, Lester Sampath
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Patent number: 6843784Abstract: The present invention relates to polymeric medical articles comprising combinations of triclosan and silver-containing compounds. It is based, at least in part, on the discovery that these agents act synergistically, thereby permitting the use of relatively low levels of both agents. While it had been previously found that triclosan can be particularly useful when used in conjunction with chlorhexidine, it has been further discovered that medical articles having suitable antimicrobial properties may be prepared, according to the present invention, which contain triclosan without chlorhexidine. Such medical articles offer the advantage of preventing or inhibiting infection while avoiding undesirable adverse reactions to chlorhexidine by individuals that may have sensitivity to chlorhexidine.Type: GrantFiled: February 5, 2001Date of Patent: January 18, 2005Assignee: The Trustees Of Columbia University in the city of New YorkInventors: Shanta Modak, Lester Sampath
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Publication number: 20040247685Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin. Hydroalcoholic gel composition containing alcohol, water, hydrogel, and emollient or emulsifier, wherein the composition has a viscosity of below 2000 centipoises at between 20 and 40° C.Type: ApplicationFiled: February 24, 2004Publication date: December 9, 2004Inventors: Shanta Modak, Trupti A. Gaonkar, Lauser Caraos, Lester Sampath
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Publication number: 20040039349Abstract: The present invention relates to polymeric medical articles comprising the anti-infective agents chlorhexidine and triclosan. It is based, at least in part, on the discovery that the synergistic relationship between these compounds permits the use of relatively low levels of both agents, and on the discovery that effective antimicrobial activity may be achieved when these compounds are comprised in either hydrophilic or hydrophobic polymers. It is also based on the discovery that chlorhexidine free base and triclosan, used together, are incorporated into polymeric medical articles more efficiently. Medical articles prepared according to the invention offer the advantage of preventing or inhibiting infection while avoiding undesirably high release of anti-infective agent, for example into the bloodstream of a subject.Type: ApplicationFiled: August 25, 2003Publication date: February 26, 2004Inventors: Shanta Modak, Lester Sampath
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Patent number: 6626873Abstract: The present invention relates to polymeric medical articles comprising the anti-infective agents chlorhexidine and triclosan. It is based, at least in part, on the discovery that the synergistic relationship between these compounds permits the use of relatively low levels of both agents, and on the discovery that effective antimicrobial activity may be achieved when these compounds are comprised in either hydrophilic or hydrophobic polymers. It is also based on the discovery that chlorhexidine free base and triclosan, used together, are incorporated into polymeric medical articles more efficiently. Medical articles prepared according to the invention offer the advantage of preventing or inhibiting infection while avoiding undesirably high release of anti-infective agent, for example into the bloodstream of a subject.Type: GrantFiled: July 18, 2000Date of Patent: September 30, 2003Assignee: Trustees of Columbia UniversityInventors: Shanta Modak, Lester Sampath
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Publication number: 20030152644Abstract: Antimicrobial compositions having synergistic combinations of octoxyglycerin and at least one other antimicrobial agent in formulations which are more effective than prior art compositions without causing increased irritation to the skin of the average user. In certain embodiments, skin irritation may be minimized by low concentrations of antimicrobials and/or the presence of soothing compounds such as zinc. Preferred embodiments include combinations of octoxyglycerin, a quaternary compound, and at least one other antimicrobial agent. Without being bound to any particular theory, it is hypothesized that the unexpected antimicrobial effectiveness of combinations of octoxyglycerin may result from an enhancement of the permeability of microbes to antimicrobials caused by octoxyglycerin.Type: ApplicationFiled: October 23, 2001Publication date: August 14, 2003Inventors: Shanta Modak, Trupti A. Gaonkar, Lester Sampath
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Patent number: 6503952Abstract: An antimicrobial composition comprising (i) between 0.025 and 2 percent of an antimicrobial agent selected from the group consisting of chlorhexidine free base, a chlorhexidine salt, polyhexamethylene biguanide, and alexidine; (ii) between 0.005 and 0.1 percent of a quaternary ammonium compound; and (iii) between 0.025 and 2 percent of a chlorinated phenol compound.Type: GrantFiled: January 11, 2001Date of Patent: January 7, 2003Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Lester Sampath, Lauserpina A. Caraos
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Publication number: 20010016589Abstract: An antimicrobial composition comprising (i) between 0.025 and 2 percent of an antimicrobial agent selected from the group consisting of chlorhexidine free base, a chlorhexidine salt, polyhexamethylene biguanide, and alexidine; (ii) between 0.005 and 0.1 percent of a quaternary ammonium compound; and (iii) between 0.025 and 2 percent of a chlorinated phenol compound.Type: ApplicationFiled: January 11, 2001Publication date: August 23, 2001Inventors: Shanta Modak, Lester Sampath, Lauserpina Caraos
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Publication number: 20010010016Abstract: The present invention relates to polymeric medical articles comprising combinations of triclosan and silver-containing compounds. It is based, at least in part, on the discovery that these agents act synergistically, thereby permitting the use of relatively low levels of both agents. While it had been previously found that triclosan can be particularly useful when used in conjunction with chlorhexidine, it has been further discovered that medical articles having suitable antimicrobial properties may be prepared, according to the present invention, which contain triclosan without chlorhexidine. Such medical articles offer the advantage of preventing or inhibiting infection while avoiding undesirable adverse reactions to chlorhexidine by individuals that may have sensitivity to chlorhexidine.Type: ApplicationFiled: February 5, 2001Publication date: July 26, 2001Inventors: Shanta Modak, Lester Sampath
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Patent number: 6224579Abstract: The present invention relates to polymeric medical articles comprising combinations of triclosan and silver-containing compounds. It is based, at least in part, on the discovery that these agents act synergistically, thereby permitting the use of relatively low levels of both agents. While it had been previously found that triclosan can be particularly useful when used in conjunction with chlorhexidine, it has been further discovered that medical articles having suitable antimicrobial properties may be prepared, according to the present invention, which contain triclosan without chlorhexidine. Such medical articles offer the advantage of preventing or inhibiting infection while avoiding undesirable adverse reactions to chlorhexidine by individuals that may have sensitivity to chlorhexidine.Type: GrantFiled: March 31, 1999Date of Patent: May 1, 2001Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Lester Sampath
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Patent number: 6106505Abstract: The present invention relates to polymeric medical articles comprising the antiinfective agents chlorhexidine and triclosan. It is based, at least in part, on the discovery that the synergistic relationship between these compounds permits the use of relatively low levels of both agents, and on the discovery that effective antimicrobial activity may be achieved when these compounds are comprised in either hydrophilic or hydrophobic polymers. It is also based on the discovery that chlorhexidine free base and triclosan, used together, are incorporated into polymeric medical articles more efficiently. Medical articles prepared according to the invention offer the advantage of preventing or inhibiting infection while avoiding undesirably high release of antiinfective agent, for example into the bloodstream of a subject.Type: GrantFiled: June 30, 1998Date of Patent: August 22, 2000Assignee: The Trustees of Columbia University of the City of New YorkInventors: Shanta Modak, Lester Sampath
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Patent number: 5985931Abstract: The present invention relates to antimicrobial compositons comprising (i) less than or equal to two percent by weight chlorhexidine or chlorhexidine salt; (ii) less than or equal to 1 percent by weight of a quaternary ammonium compound, such as benzalkonium chloride; and (iii) less than or equal to two percent by weight of parachlorometaxylenol. The antimicrobial compositions of the invention may be utilized in antimicrobial deterents, soaps, creams rinses, and emulsions for use in the medical community as well as general public use.Type: GrantFiled: June 2, 1998Date of Patent: November 16, 1999Assignee: The Trustees of Columbia University in the city of New YorkInventors: Shanta Modak, Lester Sampath
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Patent number: 5985918Abstract: The present invention relates to the use of organic salts of zinc in topical formulations. Such organic salts tend to be less water soluble and therefore less likely to result in systemic toxicity, even with chronic use. In preferred embodiments, the composition of the invention comprise zinc salicylate, which provides the antiinflammatory effect of salicylate, but wherein the zinc moiety counteracts toxic effects associated with salicylate.Type: GrantFiled: December 4, 1996Date of Patent: November 16, 1999Assignee: The Trustees of Columbia University in the City of New YorkInventors: Shanta Modak, Lester Sampath, Lauserpina Caraos