Patents by Inventor Annamalai Karthikeyan
Annamalai Karthikeyan 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: 20200085993Abstract: This invention relates to a multi-layer wound site dressing specifically designed to treat chronic wounds and simultaneously block external pathogens from infecting the wound site from the environment. The said wound dressing comprises five layers; each layer performs a specific functionality in healing and protecting the wound site. The said layers of wound care dressing comprise (i) a permeable non-adherent woven or non-woven membrane in contact with wound site, (ii) a nanofibrous composite layer made of superabsorbent, activated carbon and a polymer (iii) a hydrophobic insulating membrane which is permeable to air with an adhesive edge, (iv) a nanofibrous membrane made of polymer and activated carbon hosting functional germicidal ions, and (v) an air permeable non-woven membrane with adhesive edge. The said layers are compounded by pressing and coating to make a comprehensive multi-layer wound care dressing product.Type: ApplicationFiled: September 24, 2019Publication date: March 19, 2020Applicant: InMEDBio, LLCInventors: Ashwinraj Karthikeyan, Annamalai Karthikeyan
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Patent number: 10463760Abstract: This invention relates to a multi-layer wound site dressing specifically designed to treat chronic wounds and simultaneously block external pathogens from infecting the wound site from the environment. The said wound dressing comprises five layers; each layer performs a specific functionality in healing and protecting the wound site. The said layers of wound care dressing comprise (i) a permeable non-adherent woven or non-woven membrane in contact with wound site, (ii) a nanofibrous composite layer made of superabsorbent, activated carbon and a polymer (iii) a hydrophobic insulating membrane which is permeable to air with an adhesive edge, (iv) a nanofibrous membrane made of polymer and activated carbon hosting functional germicidal ions, and (v) an air permeable non-woven membrane with adhesive edge. The said layers are compounded by pressing and coating to make a comprehensive multi-layer wound care dressing product.Type: GrantFiled: October 31, 2018Date of Patent: November 5, 2019Assignee: InMEDBio, LLCInventors: Ashwinraj Karthikeyan, Annamalai Karthikeyan
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Publication number: 20190125924Abstract: This invention relates to a multi-layer wound site dressing specifically designed to treat chronic wounds and simultaneously block external pathogens from infecting the wound site from the environment. The said wound dressing comprises five layers; each layer performs a specific functionality in healing and protecting the wound site. The said layers of wound care dressing comprise (i) a permeable non-adherent woven or non-woven membrane in contact with wound site, (ii) a nanofibrous composite layer made of superabsorbent, activated carbon and a polymer (iii) a hydrophobic insulating membrane which is permeable to air with an adhesive edge, (iv) a nanofibrous membrane made of polymer and activated carbon hosting functional germicidal ions, and (v) an air permeable non-woven membrane with adhesive edge. The said layers are compounded by pressing and coating to make a comprehensive multi-layer wound care dressing product.Type: ApplicationFiled: October 31, 2018Publication date: May 2, 2019Applicant: InMEDBio, LLCInventors: Ashwinraj Karthikeyan, Annamalai Karthikeyan
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Patent number: 9309121Abstract: The preset invention is a hierarchically-structured carbon microbead and method for forming the microbead utilizing hydrothermal carbonization of a biomass/catalyst mixture to produce partially carbonized amorphous microspheres, wherein the biomass is an inexpensive material containing a high oxygen content component (e.g., sugar, starch, alcohol), and the catalyst is a metal or metal-containing compound, preferably a transition metal compound, and more specifically a transition metal selected from Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt. Subsequently, a heat treatment is performed where the amorphous microspheres are heated to a temperature that is sufficiently high so as to result in carbonization, graphitization, and production of a carbonaceous coating or shell on the core of the microbead.Type: GrantFiled: July 22, 2010Date of Patent: April 12, 2016Assignee: WISYS Technology Foundation, Inc.Inventors: Charles P. Gibson, Annamalai Karthikeyan
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Patent number: 9096439Abstract: High-speed formation of char, useful as a precursor to activated carbon, is produced by a combination of cellulosic material and an acid solution both preheated close to the steam temperature and then mixed. The rapid endothermic reaction rapidly chars the cellulosic material driving excess water away as steam and minimizing tar formation.Type: GrantFiled: July 18, 2013Date of Patent: August 4, 2015Assignee: WISYS TECHNOLOGY FOUNDATION, INC.Inventor: Annamalai Karthikeyan
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Publication number: 20140161709Abstract: High-speed formation of char, useful as a precursor to activated carbon, is produced by a combination of cellulosic material and an acid solution both preheated dose to the steam temperature and then mixed. The rapid endothermic reaction rapidly chars the cellulosic material driving excess water away as steam and minimizing tar formation.Type: ApplicationFiled: July 18, 2013Publication date: June 12, 2014Inventor: Annamalai Karthikeyan
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Patent number: 8737040Abstract: A pseudocapacitor employs plates having an active material of a nanoparticles sized ceramic mixed ionic-electronic conductor such as may have the nominal formula of ABO3, A2BO4, AB2O4, and AO2, where A and B are metals. The active material may be prepared to promote sublattice vacancies to provide for the storage of additional charge.Type: GrantFiled: February 18, 2010Date of Patent: May 27, 2014Assignee: Wisys Technology Foundation, Inc.Inventors: Charles P. Gibson, Annamalai Karthikeyan
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Patent number: 8139343Abstract: An electrical energy storage device includes a first electrode; a second electrode; a separator; and an electrolyte; where the separator is an electronic insulator; the separator is positioned between the first and second electrodes; the separator includes a first surface proximal to the first electrode and a second surface proximal to the second electrode; the separator is configured to support an electric double layer at the first surface, the second surface, or at both the first surface and the second surface; and the device is an electrical energy storage device.Type: GrantFiled: March 7, 2011Date of Patent: March 20, 2012Assignee: WiSys Technology FoundationInventors: Charles P. Gibson, Annamalai Karthikeyan
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Publication number: 20110297420Abstract: A pseudocapacitor employs plates having an active material of a nanoparticles sized ceramic mixed ionic-electronic conductor such as may have the nominal formula of ABO3, A2BO4, AB2O4, and AO2, where A and B are metals. The active material may be prepared to promote sublattice vacancies to provide for the storage of additional charge.Type: ApplicationFiled: February 18, 2010Publication date: December 8, 2011Inventors: Charles P. Gibson, Annamalai Karthikeyan
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Publication number: 20110157771Abstract: An electrical energy storage device includes a first electrode; a second electrode; a separator; and an electrolyte; where the separator is an electronic insulator; the separator is positioned between the first and second electrodes; the separator includes a first surface proximal to the first electrode and a second surface proximal to the second electrode; the separator is configured to support an electric double layer at the first surface, the second surface, or at both the first surface and the second surface; and the device is an electrical energy storage device.Type: ApplicationFiled: March 7, 2011Publication date: June 30, 2011Inventors: Charles P. Gibson, Annamalai Karthikeyan
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Publication number: 20110017493Abstract: The preset invention is a hierarchically-structured carbon microbead and method for forming the microbead utilizing hydrothermal carbonization of a biomass/catalyst mixture to produce partially carbonized amorphous microspheres, wherein the biomass is an inexpensive material containing a high oxygen content component (e.g., sugar, starch, alcohol), and the catalyst is a metal or metal-containing compound, preferably a transition metal compound, and more specifically a transition metal selected from Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt. Subsequently, a heat treatment is performed where the amorphous microspheres are heated to a temperature that is sufficiently high so as to result in carbonization, graphitization, and production of a carbonaceous coating or shell on the core of the microbead.Type: ApplicationFiled: July 22, 2010Publication date: January 27, 2011Inventors: Charles P. Gibson, Annamalai Karthikeyan
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Publication number: 20100316918Abstract: In various aspects, provided are substantially single phase ceramic membranes, gas separation devices based thereon, and methods of making the membranes. In various embodiments, the membranes and devices can be used for hydrogen production, such as in a fuel-cell.Type: ApplicationFiled: April 9, 2007Publication date: December 16, 2010Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Shriram Ramanathan, Annamalai Karthikeyan
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Publication number: 20100255387Abstract: In various aspects, provided are methods for: (a) improving oxygen incorporation in a solid oxide layer less than about 1000 nm thick; (b) extending the on-set of mixed conduction in a solid oxide layer less than about 1000 nm thick; (c) modulating the electrical conductivity of oxide ion conducting layer less than about 1000 nm thick; (d) decreasing the conductivity of an oxide ion conducting layer less than about 1000 nm thick; (e) improving the performance of a solid oxide fuel cell; and (f) improving the performance of a gas separation device. In various embodiments, the methods comprise exposing oxygen to light having one or more wavelengths in the range between about 100 nm to about 365 nm and contacting the layer with the oxygen so exposed. In various embodiments, the methods provide the potential for tailoring the surface catalytic activity of oxygen-ion and mixed conductors used in various solid-state devices.Type: ApplicationFiled: December 27, 2007Publication date: October 7, 2010Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Shriram Ramanathan, Annamalai Karthikeyan
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Patent number: 7588626Abstract: A mixed ionic and electronic conducting membrane includes a two-phase solid state ceramic composite, wherein the first phase comprises an oxygen ion conductor and the second phase comprises an n-type electronically conductive oxide, wherein the electronically conductive oxide is stable at an oxygen partial pressure as low as 10?20 atm and has an electronic conductivity of at least 1 S/cm. A hydrogen separation system and related methods using the mixed ionic and electronic conducting membrane are described.Type: GrantFiled: October 21, 2005Date of Patent: September 15, 2009Assignee: Trustees of Boston UniversityInventors: Srikanth Gopalan, Uday B. Pal, Annamalai Karthikeyan, Cui Hengdong
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Publication number: 20060191408Abstract: A mixed ionic and electronic conducting membrane includes a two-phase solid state ceramic composite, wherein the first phase comprises an oxygen ion conductor and the second phase comprises an n-type electronically conductive oxide, wherein the electronically conductive oxide is stable at an oxygen partial pressure as low as 10?20 atm and has an electronic conductivity of at least 1 S/cm. A hydrogen separation system and related methods using the mixed ionic and electronic conducting membrane are described.Type: ApplicationFiled: October 21, 2005Publication date: August 31, 2006Applicant: Trustees of Boston UniversityInventors: Srikanth Gopalan, Uday Pal, Annamalai Karthikeyan, Cui Hengdong