Patents by Inventor Juan Carlos Medina
Juan Carlos Medina 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: 11667830Abstract: A continuous process for forming a coated proppant, said process comprising the steps of: (a) washing particles, (b) drying the particles at a first predetermined temperature, (c) cooling the particles, (d) feeding the cooled particles with a second predetermined temperature lower than the first predetermined temperature to an inlet of a combined continuous mixer and conveyor unit, (e) feeding a coating composition into the combined continuous mixer and conveyor unit, (f) mixing and simultaneously conveying the particles and the coating composition for a predetermined time, (g) curing the coating composition by transfer of heat from the particles, (h) discharging the coated particles from an outlet of the combined continuous mixer and conveyor unit, wherein said process does not comprise a step of heating the particles after the drying.Type: GrantFiled: December 6, 2019Date of Patent: June 6, 2023Assignee: Dow Global Technologies LLCInventors: Praveen Agarwal, Arjun Raghuraman, Juan Carlos Medina
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Publication number: 20220275270Abstract: Coated proppant particles are prepared by coating the particles with at least one polyisocyanate, and at least one urethane catalyst, and starch is present during at least part of the curing step. The starch becomes incorporated into in at least a portion of the cured coating. The coating cures rapidly at moderate temperatures, and bonds to itself well under conditions of heat and pressure as are experienced by the particles in subterranean formations.Type: ApplicationFiled: April 30, 2020Publication date: September 1, 2022Inventors: Praveen Agarwal, Juan Carlos Medina
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Publication number: 20220025249Abstract: A continuous process for forming a coated proppant, said process comprising the steps of: (a) washing particles, (b) drying the particles at a first predetermined temperature, (c) cooling the particles, (d) feeding the cooled particles with a second predetermined temperature lower than the first predetermined temperature to an inlet of a combined continuous mixer and conveyor unit, (e) feeding a coating composition into the combined continuous mixer and conveyor unit, (f) mixing and simultaneously conveying the particles and the coating composition for a predetermined time, (g) curing the coating composition by transfer of heat from the particles, (h) discharging the coated particles from an outlet of the combined continuous mixer and conveyor unit, wherein said process does not comprise a step of heating the particles after the drying.Type: ApplicationFiled: December 6, 2019Publication date: January 27, 2022Inventors: Praveen Agarwal, Arjun Raghuraman, Juan Carlos Medina
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Publication number: 20220017814Abstract: Coated proppant particles are prepared from a coating composition that includes at least one polyisocyanate and an isocyanate trimerization catalyst. The coating composition preferably is devoid of an effective amount of a urethane, urea and carbodiimide catalyst. The coating composition cures rapidly at moderate temperatures, and bonds to itself well under conditions of heat and pressure as are experienced by the particles in subterranean formations.Type: ApplicationFiled: October 31, 2019Publication date: January 20, 2022Inventors: Praveen Agarwal, Yifan Dong, Arjun Raghuraman, Aayush Shah, Juan Carlos Medina, Kshitish Patankar, Mark F. Sonnenschein
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Publication number: 20210355030Abstract: A method of preparing a polymer concrete composition includes preparing one or more adhesion promoter pre-coated aggregates, each having a base substrate and an adhesion promoter coating and the adhesion promoter coating being an outermost layer on the base substrate, providing a base composition including an isocyanate component and an isocyanate-reactive component, and mixing the one or more adhesion promoter pre-coated aggregates, the isocyanate component, and the isocyanate-reactive component to form the polymer concrete composition.Type: ApplicationFiled: September 15, 2017Publication date: November 18, 2021Inventors: Kaoru Aou, Sachit Goyal, Adam C. Colson, Juan Carlos Medina
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Publication number: 20210340375Abstract: A polymer concrete composition has a base composition including a first isocyanate component and a first isocyanate reactive component, and one or more pre-coated aggregates that each has a base substrate and a two-component reaction product polymeric coating on an outer surface of the base substrate. The polymeric coating is the reaction product of a second isocyanate component and a second isocyanate-reactive component.Type: ApplicationFiled: September 12, 2017Publication date: November 4, 2021Inventors: Kaoru Aou, Sachit Goyal, Adam C. Colson, Juan Carlos Medina, Phillip S. Athey, Arjun Raghuraman
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Patent number: 11104842Abstract: Provided are proppants for use in hydraulic fracturing operations. The proppants comprise particles having coatings disposed on them as described herein. The proppants exhibit reduced dust generation, for instance during transloading, conveying and/or offloading of the proppant at a wellsite and/or at intermediate shipping transload points.Type: GrantFiled: April 25, 2019Date of Patent: August 31, 2021Assignees: Dow Global Technologies LLC, Rohm and Haas CompanyInventors: Bruce D. Hook, Paulo Fabricio Queiroz Martins, Juan Carlos Medina, Daniele Santos, Theodore Tysak, William A. Cynecki, Andrea C. Keenan
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Patent number: 10844280Abstract: A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.Type: GrantFiled: March 21, 2018Date of Patent: November 24, 2020Assignees: Dow Global Technologies LLC, DOW SILICONES CORPORATIONInventors: Sachit Goyal, Arjun Raghuraman, Kaoru Aou, Juan Carlos Medina, Lenin Petroff, James Young, Jr.
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Patent number: 10752830Abstract: A coated proppant includes a solid core proppant particle and a heavy metal recovery coating, including heavy metal recovery crystals embedded within a polymer resin matrix. A process for the manufacture of a coated proppant includes providing a solid core proppant particle, and forming on the solid core proppant particle, a heavy metal recovery coating including heavy metal recovery crystals embedded within a polymer resin matrix.Type: GrantFiled: June 27, 2016Date of Patent: August 25, 2020Assignee: Dow Global Technologies LLCInventors: Kaoru Aou, Juan Carlos Medina, H. Robert Goltz, Sachit Goyal, Arjun Raghuraman, Fabio Aguirre Vargas, Avery L. Watkins, David A. Reuschle, Ann F. Johnson, Yasmin N. Srivastava
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Patent number: 10703964Abstract: A coated proppant includes a solid core proppant particle, a first resin coating, and a second coating on the first resin coating. The second coating includes the reaction product of one or more curatives and one or more preformed aliphatic or cycloaliphatic based isocyanurate tri-isocyanates, derived from aliphatic diisocyanates, cycloaliphatic diisocyanates, or a combination of aliphatic and cycloaliphatic diisocyanates.Type: GrantFiled: March 22, 2016Date of Patent: July 7, 2020Assignee: Dow Global Technologies LLCInventors: Sachit Goyal, Kaoru Aou, Juan Carlos Medina, Arjun Raghuraman, Armin Hassanzadeh
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Publication number: 20200017760Abstract: A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.Type: ApplicationFiled: March 21, 2018Publication date: January 16, 2020Inventors: Sachit Goyal, Arjun Raghuraman, Kaoru Aou, Juan Carlos Medina, Lenin Petroff, James Young, JR.
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Publication number: 20190270931Abstract: Provided are proppants for use in hydraulic fracturing operations. The proppants comprise particles having coatings disposed on them as described herein. The proppants exhibit reduced dust generation, for instance during transloading, conveying and/or offloading of the proppant at a wellsite and/or at intermediate shipping transload points.Type: ApplicationFiled: April 25, 2019Publication date: September 5, 2019Inventors: Bruce D. Hook, Paulo Fabricio Queiroz Martins, Juan Carlos Medina, Daniele Santos, Theodore Tysak, William A. Cynecki, Andrea C. Keenan
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Patent number: 10316243Abstract: Provided are proppants for use in hydraulic fracturing operations. The proppants comprise particles having coatings disposed on them as described herein. The proppants exhibit reduced dust generation, for instance during transloading, conveying and/or offloading of the proppant at a wellsite and/or at intermediate shipping transload points.Type: GrantFiled: November 6, 2014Date of Patent: June 11, 2019Assignees: Dow Global Technologies LLC, Rohm and Haas CompanyInventors: Bruce D. Hook, Paulo Fabricio Queiroz Martins, Juan Carlos Medina, Daniele Santos, Theodore Tysak, William A. Cynecki, Andrea C. Keenan
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Patent number: 10294391Abstract: A method for exposing a substrate to water under superatmospheric pressure at a temperature of at least 70° C. includes (a) applying a reaction mixture to a substrate, which reaction mixture has an isocyanate index of at least 10 and includes an aromatic polyisocyanate component, a polyol component having a polyol with a hydroxyl equivalent weight of at least 500, and a catalyst component having an isocyanate trimerization catalyst, and at least partially curing the reaction mixture to form a polyisocyanurate or polyurethane-isocyanurate polymer having a glass transition temperature of at least 80° C., and (b) exposing the substrate and the polyisocyanurate or polyurethane-isocyanurate polymer to water under superatmospheric pressure at a temperature of at least 70° C.Type: GrantFiled: July 9, 2014Date of Patent: May 21, 2019Assignee: Dow Global Technologies LLCInventors: Kaoru Aou, Juan Carlos Medina, Rajesh P. Paradkar, Dwight Latham, Michelle Tipps-Thomas
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Patent number: 10138417Abstract: Embodiments relate to coated proppants, a method of making the coated proppants, and a method to use coated proppants in fracturing subterranean formations around oil and gas wells to improve oil recovery. The proppants are coated with an oil well treatment agent, specifically, a wax inhibitor and/or a pour point depressant composition.Type: GrantFiled: November 18, 2015Date of Patent: November 27, 2018Assignee: Dow Global Technologies LLCInventors: Stephanie L. Potisek, Kaoru Aou, Juan Carlos Medina
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Publication number: 20180201825Abstract: A coated proppant includes a solid core proppant particle, and a sulfide recovery coating that includes a sulfide capturing agent embedded within a polymer resin matrix. The sulfide capturing agent is a metal oxide.Type: ApplicationFiled: June 23, 2016Publication date: July 19, 2018Inventors: Arjun Raghuraman, Alexander Williamson, Sachit Goyal, Runyu Tan, Juan Carlos Medina, Kaoru Aou
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Publication number: 20180194992Abstract: A coated proppant includes a solid core proppant particle and a heavy metal recovery coating, including heavy metal recovery crystals embedded within a polymer resin matrix. A process for the manufacture of a coated proppant includes providing a solid core proppant particle, and forming on the solid core proppant particle, a heavy metal recovery coating including heavy metal recovery crystals embedded within a polymer resin matrix.Type: ApplicationFiled: June 27, 2016Publication date: July 12, 2018Inventors: Kaoru Aou, Juan Carlos Medina, H. Robert Goltz, Sachit Goyal, Arjun Raghuraman, Fabio Aguirre Vargas, Avery L. Watkins, David A. Reuschle, Ann F. Johnson, Yasmin N. Srivastava
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Publication number: 20180186098Abstract: A fiber-reinforced composite article useful for contaminant removal comprising at least one single layer of a fiber-reinforced composite having (a) at least one first polymer fiber-free region containing material adapted for removing contaminants, (b) at least one second polymer fiber-rich region containing fiber reinforcement material; and (c) at least one third polymer boundary region containing a portion of the first polymer fiber-free region and a portion of the second polymer fiber-rich region; a process for manufacturing the fiber-reinforced composite article; and a process for removing contaminants from a liquid fluid using the fiber-reinforced composite article.Type: ApplicationFiled: June 21, 2016Publication date: July 5, 2018Inventors: Kevin J. Meyer, Kaoru Aou, Juan Carlos Medina, Douglas L. Potts
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Publication number: 20180187820Abstract: A contaminant capturing liner includes a cured product of a composition including an epoxy resin component including at least one alkanolamine modified epoxy resin and at least one hardener. The contaminant capturing liner includes at least one contaminant capturing material embedded therewithin, and the contaminant capturing liner is a permeable layer having a difference between dry glass transition temperature and wet glass transition temperature of at least 14 C.Type: ApplicationFiled: June 21, 2016Publication date: July 5, 2018Inventors: Fabio Aguirre Vargas, John Klier, William A. Koonce, Juan Carlos Medina, Nathan Wilmot, Kaoru Aou, Sachit Goyal
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Publication number: 20180185815Abstract: A sulfide recovery coating for containers, tanks, pipes, and pipelines, which sulfide recovery coating includes a sulfide capturing agent embedded within a polymer resin matrix. The sulfide capturing agent is a metal oxide and accounts for less than 70 wt % of a total weight a composition for forming the sulfide recovery coating.Type: ApplicationFiled: June 20, 2016Publication date: July 5, 2018Inventors: Fabio Aguirre Vargas, Arjun Raghuraman, Alexander Williamson, Sachit Goyal, Juan Carlos Medina