Patents by Inventor Subramanyam V
Subramanyam V 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: 11746243Abstract: Self-healing compositions, method of preparation and uses thereof are disclosed. In an example, a self-healing composition includes a first microcapsule and a second microcapsule. The first microcapsule includes a first polydimethylsiloxane resin, a first silicone fluid, a first functionalized alkoxysilane, and a catalyst capable of catalyzing hydrosilylation reactions, and the second microcapsule includes a second polydimethylsiloxane resin, a second silicone fluid, a second functionalized alkoxysilane, and a hydrogen-terminated dimethyl siloxane resin. In this way, the self-healing composition releases and mixes contents of the first microcapsule and the second microcapsule upon the rupture thereof, imparting a passively initiated repair process to the self-healing composition.Type: GrantFiled: May 29, 2020Date of Patent: September 5, 2023Assignee: Autonomic Materials, Inc.Inventors: Gerald O. Wilson, Aidnel Geister R. Navarro, Subramanyam V. Kasisomayajula
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Patent number: 11613668Abstract: Embodiments provide a self-healing coating formulation comprised of a one component waterborne epoxy-amine adduct resin system and a microencapsulated healing agent. The self-healing coating formulation hardens to a protective material upon application to a substrate. Components in the protective material and microencapsulated healing agent are uniquely synergistic with each other such that, upon degradation of the protective material, microcapsule rupture causes release of the healing agent, whereby components of the healing agent react with components of the protective material to increase adhesion maintenance and corrosion resistance of the protective coating.Type: GrantFiled: December 22, 2020Date of Patent: March 28, 2023Assignee: AUTONOMIC MATERIALS, INC.Inventors: Christopher R. D. Dayton, Gerald O. Wilson, Subramanyam V. Kasisomayajula, Swapnil Shukla, Aidnel Geister R. Navarro, Diana Rodriguez
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Publication number: 20210206992Abstract: Embodiments provide a self-healing coating formulation comprised of a one component waterborne epoxy-amine adduct resin system and a microencapsulated healing agent. The self-healing coating formulation hardens to a protective material upon application to a substrate. Components in the protective material and microencapsulated healing agent are uniquely synergistic with each other such that, upon degradation of the protective material, microcapsule rupture causes release of the healing agent, whereby components of the healing agent react with components of the protective material to increase adhesion maintenance and corrosion resistance of the protective coating.Type: ApplicationFiled: December 22, 2020Publication date: July 8, 2021Applicant: Autonomic Materials, Inc.Inventors: Christopher R. D. Dayton, Gerald O. Wilson, Subramanyam V. Kasisomayajula, Swapnil Shukla, Aidnel Geister R. Navarro, Diana Rodriguez
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Publication number: 20200377737Abstract: Self-healing compositions, method of preparation and uses thereof are disclosed. In an example, a self-healing composition includes a first microcapsule and a second microcapsule. The first microcapsule includes a first polydimethylsiloxane resin, a first silicone fluid, a first functionalized alkoxysilane, and a catalyst capable of catalyzing hydrosilylation reactions, and the second microcapsule includes a second polydimethylsiloxane resin, a second silicone fluid, a second functionalized alkoxysilane, and a hydrogen-terminated dimethyl siloxane resin. In this way, the self-healing composition releases and mixes contents of the first microcapsule and the second microcapsule upon the rupture thereof, imparting a passively initiated repair process to the self-healing composition.Type: ApplicationFiled: May 29, 2020Publication date: December 3, 2020Applicant: Autonomic Materials, Inc.Inventors: Gerald O. Wilson, Aidnel Geister R. Navarro, Subramanyam V. Kasisomayajula
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Patent number: 10829619Abstract: Microencapsulated healing agents that, upon incorporation into a zinc-rich coating or coating system, improve the coating or coating system's ability to maintain its adhesion and corrosion resistance after damage that exposes the underlying substrate. These microencapsulated healing agent formulations are uniquely synergistic with zinc-rich coatings, and/or with zinc particles in a zinc rich coating, improving both adhesion maintenance and corrosion resistance following damage that exposes the substrate.Type: GrantFiled: April 9, 2018Date of Patent: November 10, 2020Assignee: Autonomic Materials, Inc.Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Christopher R. D. Dayton
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Publication number: 20190270865Abstract: Microencapsulated healing agents that, upon incorporation into a zinc-rich coating or coating system, improve the coating or coating system's ability to maintain its adhesion and corrosion resistance after damage that exposes the underlying substrate. These microencapsulated healing agent formulations are uniquely synergistic with zinc-rich coatings, and/or with zinc particles in a zinc rich coating, improving both adhesion maintenance and corrosion resistance following damage that exposes the substrate.Type: ApplicationFiled: April 9, 2018Publication date: September 5, 2019Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Christopher R. D. Dayton
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Patent number: 10196491Abstract: Disclosed herein are methods and formulations for the microencapsulation of aminosiloxanes, for example for use as an additive in protective material formulations such as those used in the protection and/or joining of metal substrates. The additives may be used in conjunction with a second reactant that may or may not be similarly microencapsulated for self-healing (and associated corrosion resistance) or delayed cure applications, or they may be used alone or in conjunction with other corrosion inhibitors for protective formulations with improved corrosion resistance on appropriate substrates.Type: GrantFiled: December 12, 2016Date of Patent: February 5, 2019Assignee: Autonomic Materials, Inc.Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Mei-Hsiu Lai, Christopher R. Dayton, Angela C. Smith
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Patent number: 9771478Abstract: Disclosed herein are compositions and methods for increasing microcapsule dispersion in self-healing paint and coating applications, and more particularly for non-covalent functionalization of polymeric microcapsule shell walls for improved dispersion in polymeric material formulations. Some embodiments are methods of forming a microcapsule dispersion, the methods including providing a polymeric material capable of forming a plurality of microcapsules; initiating polymerization of the polymeric material under reaction conditions sufficient to permit formation of the plurality of microcapsules; and adding an ethoxy-functionalized dispersant to the polymeric material before formation of the plurality of microcapsules is complete, thereby forming the microcapsule dispersion.Type: GrantFiled: July 11, 2014Date of Patent: September 26, 2017Assignee: Autonomic Materials, Inc.Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Ryan T. Blanchette
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Publication number: 20170166709Abstract: Disclosed herein are methods and formulations for the microencapsulation of aminosiloxanes, for example for use as an additive in protective material formulations such as those used in the protection and/or joining of metal substrates. The additives may be used in conjunction with a second reactant that may or may not be similarly microencapsulated for self-healing (and associated corrosion resistance) or delayed cure applications, or they may be used alone or in conjunction with other corrosion inhibitors for protective formulations with improved corrosion resistance on appropriate substrates.Type: ApplicationFiled: December 12, 2016Publication date: June 15, 2017Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Mei-Hsiu Lai, Christopher R. Dayton, Angela C. Smith
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Publication number: 20150018485Abstract: Disclosed herein are compositions and methods for increasing microcapsule dispersion in self-healing paint and coating applications, and more particularly for non-covalent functionalization of polymeric microcapsule shell walls for improved dispersion in polymeric material formulations. Some embodiments are methods of forming a microcapsule dispersion, the methods including providing a polymeric material capable of forming a plurality of microcapsules; initiating polymerization of the polymeric material under reaction conditions sufficient to permit formation of the plurality of microcapsules; and adding an ethoxy-functionalized dispersant to the polymeric material before formation of the plurality of microcapsules is complete, thereby forming the microcapsule dispersion.Type: ApplicationFiled: July 11, 2014Publication date: January 15, 2015Inventors: Gerald O. Wilson, Subramanyam V. Kasisomayajula, Ryan T. Blanchette
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Patent number: 8577106Abstract: The invention relates to a fully automated screening, diagnosis and classification technique for Alzheimer's disease using magnetic resonance imaging signals from the ventricular zone contour of the brain to get a fundamental index of brain deterioration comprising the steps: —obtaining a gray scale MRI image of the brain region; —applying a contour edge-detecting algorithm to the image; —employing a grid covering method for calculating a first order metric index of ventricular zone contour; —superimposing metric square grids of increasing edge length to the binary contour image and counting the metric grid squares; —plotting the logs of metric grid squares against the logs of edge lengths, wherein the gradient of the plot is the linear topological metric index.Type: GrantFiled: February 10, 2009Date of Patent: November 5, 2013Assignees: Department of Biotechnology, National Brain Research CentreInventors: Prasun Roy, Subramanyam V. P. Rallabandi
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Publication number: 20110286650Abstract: The invention relates to a fully automated screening, diagnosis and classification technique for Alzheimer's disease using magnetic resonance imaging signals from the ventricular zone contour of the brain to get a fundamental index of brain deterioration comprising the steps: —obtaining a gray scale MRI image of the brain region; —applying a contour edge-detecting algorithm to the image; —employing a grid covering method for calculating a first order metric index of ventricular zone contour; —superimposing metric square grids of increasing edge length to the binary contour image and counting the metric grid squares; —plotting the logs of metric grid squares against the logs of edge lengths, wherein the gradient of the plot is the linear topological metric index.Type: ApplicationFiled: February 10, 2009Publication date: November 24, 2011Applicants: NATIONAL BRAIN RESEARCH CENTRE, DEPARTMENT OF BIOTECHNOLOGYInventors: Prasun Roy, Subramanyam V.P. Rallabandi
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Publication number: 20080034347Abstract: A computerized tool and techniques for enabling a software lifecycle management tool for an end user is provided. In one example embodiment, this is accomplished by using a V-process software development lifecycle model built with a workflow engine on an IT governance application. The technique provides an end-to-end life cycle with automatic review processes that complies with an external quality standard, such as level 2 CMMI. Further, the technique provides an on-line reference document including best practices at each phase in the V-process lifecycle.Type: ApplicationFiled: November 9, 2006Publication date: February 7, 2008Inventors: Subramanyam V, Sangeeta Kar