Patents by Inventor Luz M. Calle
Luz M. Calle 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: 10767058Abstract: Corrosion inhibitor materials are provided that release active corrosion inhibitor compounds when they are most needed—in response to changes in conditions, including acid or basic pH, that cause corrosion or occur at the early stages of corrosion. The materials comprise particles that can be dispersed in paints and coatings for metals. The particles in some cases include ionic water-soluble anti-corrosion agents complexed to oppositely charged surfactants and entrapped in silica oxide or metal oxide gels.Type: GrantFiled: February 26, 2016Date of Patent: September 8, 2020Assignee: United States of America as Represented by the Administrator of NASAInventors: Xuejun Zhang, Wenyan Li, Luz M. Calle
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Patent number: 9233394Abstract: Hydrophobic-core microcapsules and methods of their formation are provided. A hydrophobic-core microcapsule may include a shell that encapsulates a hydrophobic substance with a core substance, such as dye, corrosion indicator, corrosion inhibitor, and/or healing agent, dissolved or dispersed therein. The hydrophobic-core microcapsules may be formed from an emulsion having hydrophobic-phase droplets, e.g., containing the core substance and shell-forming compound, dispersed in a hydrophilic phase. The shells of the microcapsules may be capable of being broken down in response to being contacted by an alkali, e.g., produced during corrosion, contacting the shell.Type: GrantFiled: August 13, 2010Date of Patent: January 12, 2016Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Luz M. Calle, Wenyan Li, Jerry W. Buhrow, Scott T. Jolley
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Patent number: 9227221Abstract: Hydrophilic-core microcapsules and methods of their formation are provided. A hydrophilic-core microcapsule may include a shell that encapsulates water with the core substance dissolved or dispersed therein. The hydrophilic-core microcapsules may be formed from an emulsion having hydrophilic-phase droplets dispersed in a hydrophobic phase, with shell-forming compound contained in the hydrophilic phase or the hydrophobic phase and the core substance contained in the hydrophilic phase. The shells of the microcapsules may be capable of being broken down in response to being contacted by an alkali, e.g., produced during corrosion, contacting the shell.Type: GrantFiled: August 16, 2010Date of Patent: January 5, 2016Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Luz M. Calle, Wenyan Li, Jerry W. Buhrow, Scott T. Jolley
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Patent number: 9108178Abstract: Elongated microcapsules, such as elongated hydrophobic-core and hydrophilic-core microcapsules, may be formed by pulse stirring an emulsion or shearing an emulsion between two surfaces moving at different velocities. The elongated microcapsules may be dispersed in a coating formulation, such as paint.Type: GrantFiled: January 20, 2012Date of Patent: August 18, 2015Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Luz M. Calle, Wenyan N. Li, Jerry W. Buhrow, Stephen A. Perusich, Scott T. Jolley, Tracy L. Gibson, Martha K. Williams
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Patent number: 8859288Abstract: Methods to produce pH-sensitive microparticles that have an active agent dispersed in a polymer matrix have certain advantages over microcapsules with an active agent encapsulated in an interior compartment/core inside of a polymer wall. The current invention relates to pH-sensitive microparticles that have a corrosion-detecting or corrosion-inhibiting active agent or active agents dispersed within a polymer matrix of the microparticles. The pH-sensitive microparticles can be used in various coating compositions on metal objects for corrosion detecting and/or inhibiting.Type: GrantFiled: July 5, 2012Date of Patent: October 14, 2014Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Wenyan Li, Jerry W. Buhrow, Scott T. Jolley, Luz M. Calle
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Publication number: 20130017612Abstract: Methods to produce pH-sensitive microparticles that have an active agent dispersed in a polymer matrix have certain advantages over microcapsules with an active agent encapsulated in an interior compartment/core inside of a polymer wall. The current invention relates to pH-sensitive microparticles that have a corrosion-detecting or corrosion-inhibiting active agent or active agents dispersed within a polymer matrix of the microparticles. The pH-sensitive microparticles can be used in various coating compositions on metal objects for corrosion detecting and/or inhibiting.Type: ApplicationFiled: July 5, 2012Publication date: January 17, 2013Applicant: United States of America as Represented by the Administrator of the National Aeronautics and SpacInventors: Wenyan LI, Jerry W. BUHROW, Scott T. JOLLEY, Luz M. CALLE
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Publication number: 20120207921Abstract: Elongated microcapsules, such as elongated hydrophobic-core and hydrophilic-core microcapsules, may be formed by pulse stirring an emulsion or shearing an emulsion between two surfaces moving at different velocities. The elongated microcapsules may be dispersed in a coating formulation, such as paint.Type: ApplicationFiled: January 20, 2012Publication date: August 16, 2012Applicants: Space AdministrationInventors: Luz M. Calle, Wenyan N. Li, Jerry W. Buhrow, Stephen A. Perusich, Scott T. Jolley, Tracy L. Gibson, Martha K. Williams
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Publication number: 20100320421Abstract: Hydrophilic-core microcapsules and methods of their formation are provided. A hydrophilic-core microcapsule may include a shell that encapsulates water with the core substance dissolved or dispersed therein. The hydrophilic-core microcapsules may be formed from an emulsion having hydrophilic-phase droplets dispersed in a hydrophobic phase, with shell-forming compound contained in the hydrophilic phase or the hydrophobic phase and the core substance contained in the hydrophilic phase. The shells of the microcapsules may be capable of being broken down in response to being contacted by an alkali, e.g., produced during corrosion, contacting the shell.Type: ApplicationFiled: August 16, 2010Publication date: December 23, 2010Applicant: U.S.A. as Represented by the Administrator of the National Aeronautics and Spac AdrInventors: Luz M. CALLE, Wenyan LI, Jerry W. BUHROW, Scott T. JOLLEY
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Publication number: 20100305234Abstract: Hydrophobic-core microcapsules and methods of their formation are provided. A hydrophobic-core microcapsule may include a shell that encapsulates a hydrophobic substance with a core substance, such as dye, corrosion indicator, corrosion inhibitor, and/or healing agent, dissolved or dispersed therein. The hydrophobic-core microcapsules may be formed from an emulsion having hydrophobic-phase droplets, e.g., containing the core substance and shell-forming compound, dispersed in a hydrophilic phase. The shells of the microcapsules may be capable of being broken down in response to being contacted by an alkali, e.g., produced during corrosion, contacting the shell.Type: ApplicationFiled: August 13, 2010Publication date: December 2, 2010Applicants: Space AdministrationInventors: Luz M. Calle, Wenyan Li, Jerry W. Buhrow, Scott T. Jolley
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Publication number: 20100242788Abstract: Coatings and methods are provided. An embodiment of the coating includes microcapsules that contain at least one of a corrosion inhibitor, a film-forming compound, and an indicator. The microcapsules are dispersed in a coating vehicle. A shell of each microcapsule breaks down in the presence of an alkaline condition, resulting from corrosion.Type: ApplicationFiled: June 2, 2010Publication date: September 30, 2010Applicants: Space AdministrationInventors: Luz M. Calle, Wenyan Li
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Patent number: 7790225Abstract: Coatings and methods are provided. An embodiment of the coating includes microcapsules that contain at least one of a corrosion inhibitor, a film-forming compound, and an indicator. The microcapsules are dispersed in a coating vehicle. A shell of each microcapsule breaks down in the presence of an alkaline condition, resulting from corrosion.Type: GrantFiled: September 19, 2005Date of Patent: September 7, 2010Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Luz M. Calle, Wenyan Li