Patents Assigned to General Engineering & Research, L.L.C.
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Patent number: 11728074Abstract: This invention relates to magnetocaloric materials comprising alloys useful for magnetic refrigeration applications. In some embodiments, the disclosed alloys may be Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are limited thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. Surprisingly, the performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.Type: GrantFiled: February 20, 2019Date of Patent: August 15, 2023Assignees: General Engineering & Research, L.L.C., The Regents of the University of CaliforniaInventors: Robin Ihnfeldt, Eunjeong Kim, Sungho Jin, Renkun Chen, Xia Xu
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Patent number: 11225703Abstract: This invention relates to magnetocaloric materials comprising ternary alloys useful for magnetic refrigeration applications. The disclosed ternary alloys are Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are no thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. The performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.Type: GrantFiled: January 8, 2018Date of Patent: January 18, 2022Assignees: General Engineering & Research, L.L.C., The Regents of The University of CaliforniaInventors: Robin Ihnfeldt, Sungho Jin, Renkun Chen, Xia Xu, Elizabeth Caldwell, Eunjeong Kim
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Publication number: 20190352747Abstract: This invention relates to magnetocaloric materials comprising ternary alloys useful for magnetic refrigeration applications. The disclosed ternary alloys are Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are no thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. The performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.Type: ApplicationFiled: January 8, 2018Publication date: November 21, 2019Applicants: General Engineering & Research, L.L.C., The Regents of the University of CaliforniaInventors: Robin IHNFELDT, Sungho JIN, Renkun CHEN, Xia XU, Elizabeth CALDWELL, Eunjeong KIM
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Patent number: 10451321Abstract: This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. Using high thermal conductivity magnetocaloric composites in conjunction with thermoelectric elements acting as thermal switches which are electrically coupled to a magnetization and demagnetization cycle enables the use of larger quantities of magnetocaloric material, and high efficiency solid state cooling can be achieved. Solid state cooling devices are useful for a variety of industrial applications which require cooling, such as, but not limited to cooling of microelectronic devices, cooling on space platforms, etc.Type: GrantFiled: September 1, 2017Date of Patent: October 22, 2019Assignees: General Engineering & Research, L.L.C., The Regents of The University of CaliforniaInventors: Robin Veronica Ihnfeldt, Xia Xu, Renkun Chen, Sungho Jin, Jianlin Zheng
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Patent number: 9334422Abstract: The invention relates to a contact release capsule comprising a particle, a chemical payload, and a polymer coating, wherein the particle is impregnated with the chemical payload, and the chemical payload is held inside the particle by the polymer coating until the contact release capsule contacts a surface and a shearing force removes the polymer coating allowing the chemical payload to release outside the particle. The contact release capsule is useful in chemical mechanical planarization slurries. Particularly, the contact release capsule may comprise a glycine impregnated silica nanoparticle coated with a polymer, wherein the contact release capsule is dispersed in an aqueous solution and used in the copper chemical mechanical planarization process. Use of the contact release capsule in a slurry for copper chemical mechanical planarization may significantly improve planarization efficiency, decrease unwanted etching and corrosion, and improve dispersion stability.Type: GrantFiled: January 20, 2015Date of Patent: May 10, 2016Assignee: General Engineering & Research, L.L.C.Inventor: Robin Ihnfeldt
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Patent number: 8980122Abstract: The invention relates to a contact release capsule comprising a particle, a chemical payload, and a polymer coating, wherein the particle is impregnated with the chemical payload, and the chemical payload is held inside the particle by the polymer coating until the contact release capsule contacts a surface and a shearing force removes the polymer coating allowing the chemical payload to release outside the particle. The contact release capsule is useful in chemical mechanical planarization slurries. Particularly, the contact release capsule may comprise a glycine impregnated silica nanoparticle coated with a polymer, wherein the contact release capsule is dispersed in an aqueous solution and used in the copper chemical mechanical planarization process. Use of the contact release capsule in a slurry for copper chemical mechanical planarization may significantly improve planarization efficiency, decrease unwanted etching and corrosion, and improve dispersion stability.Type: GrantFiled: July 5, 2012Date of Patent: March 17, 2015Assignee: General Engineering & Research, L.L.C.Inventor: Robin Ihnfeldt