Patents by Inventor Debasish Banerjee
Debasish Banerjee 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: 11776521Abstract: A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.Type: GrantFiled: February 10, 2021Date of Patent: October 3, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Xiaoshi Su, Debasish Banerjee, Kai Aizawa, Steven R. Sorenson
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Patent number: 11749899Abstract: A multilayer thin film that reflects an omnidirectional structural color having a reflective core layer comprising a metallic material, a second layer extending across the reflective core layer, a third layer extending across the second layer, and an outer layer extending across the third layer. The multilayer thin film reflects a single narrow band of visible light that is less than 30° measured in Lab color space when viewed from angles between 0° and 45°, and the reflective core layer has a skin depth ? of greater than or equal to 1.0 ?m in a frequency range from 20-40 GHz, as calculated by: ? = 2 ? ? ( 2 ? ? ? f ) ? ( ? 0 ? ? r ) ? 5 ? 0 ? 3 ? ? ? r ? f , ? is skin depth in meters (m); ? is resistivity in ohm meter (?·m); f is frequency of an electromagnetic radiation in hertz (Hz); ?0 is permeability; and ?r is relative permeability of the metallic material.Type: GrantFiled: March 31, 2021Date of Patent: September 5, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Debasish Banerjee, Songtao Wu, Naohide Uchida, Takeshi Yamakawa, Hidetaka Asano
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Patent number: 11726239Abstract: A multilayer thin film that reflects an omnidirectional structural color including a multilayer stack. The multilayer stack includes a reflector layer; a selective absorber layer extending over the reflector layer; an absorbing layer extending over the first layer; and a dielectric layer extending over the second layer. The multilayer thin film reflects a single narrow band of visible light when exposed to broadband electromagnetic radiation, the single narrow band of visible light having a center wavelength greater than 550 nm, and a visible full width at half maximum (FWHM) width of less than 200 nm. A color shift of the reflected single narrow band of visible light is less than 50 nm when the multilayer stack is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45 degrees relative to a direction normal to an outer surface of the multilayer thin film.Type: GrantFiled: July 1, 2021Date of Patent: August 15, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Debasish Banerjee, Minjuan Zhang, Masahiko Ishii
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Patent number: 11656388Abstract: A composite material including a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%. The composite material also has a blackness (My) from 125 to 165.Type: GrantFiled: June 8, 2022Date of Patent: May 23, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Michael P. Rowe, Songtao Wu, Debasish Banerjee, Charles R. Rutledge, Torin C. Peck, Michael Jones
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Patent number: 11631868Abstract: A fuel cell assembly, a heat pipe for such a fuel cell assembly, and a fuel cell stack. The fuel cell assembly includes a fuel cell having an MEA structure, and a pair of heat pipe separator plates in physical and thermal contact with a planar surface of the fuel cell. Each heat pipe separator plate includes an external heat transfer fin to dissipate a portion of the heat generated by the fuel cell through exposed outer peripheral edges thereof. Each heat pipe separator plate also includes voids formed in an interior planar surface thereof, to be aligned with voids of other heat pipe separator plates when the fuel cell assembly is arranged in a stack. Upper voids are to define upper interior channels in fluid communication with a portion of the air stream supplied to the cathode. A heat transfer insert is arranged in the upper voids, and includes internal heat transfer fins to dissipate another portion of the heat into the upper interior channels for contact with the air stream.Type: GrantFiled: April 3, 2020Date of Patent: April 18, 2023Assignee: Toyota Motor Engineering and Manufacturing North America, Inc.Inventors: Gaohua Zhu, Tom Shieh, Swetha Minupuri, Evan Fleming, Debasish Banerjee
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Patent number: 11574619Abstract: An acoustic structure for beaming soundwaves from a first direction toward a second direction, may include a plurality of phononic crystals. The plurality of phononic crystals have an outer border, an internal cavity and a channel extending between the outer border and the internal cavity, wherein the channel defines an opening within the outer border. The phononic crystals are disposed such that the opening faces the second direction. Soundwaves from the first direction are beamed to the second direction by the plurality of phononic crystals.Type: GrantFiled: September 29, 2020Date of Patent: February 7, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Xiaoshi Su, Debasish Banerjee
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Patent number: 11555280Abstract: A sound absorbing structure includes a wall having a first side and a second side and at least one acoustic scatterer coupled to a first side of the wall. The first side of the wall may be positioned to face a source of noise, such as moving motor vehicles, airplanes, and the like. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end with the channel open end being in fluid communication with the opening.Type: GrantFiled: September 29, 2020Date of Patent: January 17, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Xiaoshi Su, Debasish Banerjee
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Patent number: 11557271Abstract: A sound isolation device includes at least one degenerate acoustic scatterer having a plurality of channels. The plurality of channels may include three or more channels. The channels have an open end and a terminal end, wherein the terminal ends of the channels are separate from one another. The at least one degenerate acoustic scatterer has an acoustic monopole response and an acoustic dipole response that have a substantially similar resonant frequency.Type: GrantFiled: November 11, 2019Date of Patent: January 17, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Xiaoshi Su, Debasish Banerjee, Yuji Shintaku, Katsuhiko Nakajima
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Patent number: 11545128Abstract: An acoustic structure includes a plate and at least one acoustic scatterer having a resonant frequency and coupled to a side of the plate. The at least one acoustic scatterer has an opening, a first channel and a second channel. The first channel has a first channel open end and a first channel terminal end with the first channel open end being in fluid communication with the opening. The second channel has a second channel open end and a second channel terminal end with the second channel open end being in fluid communication with the opening. The first channel terminal end and the second channel terminal end are separate from one another.Type: GrantFiled: November 11, 2019Date of Patent: January 3, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Xiaoshi Su, Debasish Banerjee
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Publication number: 20220396495Abstract: A copper oxide crystallite having an average particle size that is greater than or equal to 5 nm and less than or equal to 15 nm, a ratio of (?111)/(111) greater than or equal to 0.5 and less than or equal to 1.5, and a blackness My greater than or equal to 130 and less than or equal to 170. The copper oxide crystallite has a reflectivity in the visible spectrum of electromagnetic radiation that is less than or equal to 10.0%, and a reflectivity in the near-IR and LiDAR spectrum of electromagnetic radiation that is greater than or equal to 10%.Type: ApplicationFiled: June 8, 2022Publication date: December 15, 2022Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Songtao Wu, Debasish Banerjee, Krishna Gunugunuri
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Publication number: 20220257610Abstract: The invention describes an approach to sublingual administration of drugs where in pharmacologically inactive adjuvant have been used to transport the drugs rapidly to the tissue receptor sites to create a faster and a much greater response compared to oral administration or sublingual administration of the same drugs without the use of adjuvant. These compounds enhance the passage of the drug through the buccal mucosa and transfer to the active site. Here we have enhanced the activity of glipizide and alprazzolam by their use. In the first case the activity of glipizide is enhanced 32 times and in the 2nd case the activity of alprazolam by 2 times approximately. An advantage of enhancing the activity glipizide is that it obliterates the use of metformin thereby making the product much safer for use and effective in situations of diabetic coma and lactic acidosis where mortality rates are around 60%.Type: ApplicationFiled: July 28, 2019Publication date: August 18, 2022Inventor: Debasish Banerjee
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Publication number: 20220259755Abstract: A discrete metallic particle having a metallic material, and a coating covering at least a portion of the metallic component. The discrete metallic particle has a thickness from 50 nm to 1000 nm, and the discrete metallic particle has a skin depth ? of greater than or equal to 1.0 ?m in a frequency range from 20-40 GHz. The skin depth ? is calculated by: ? = 2 ? ? ( 2 ? ? ? f ) ? ( ? 0 ? ? r ) ? 503 ? ? ? r ? f Where ? is skin depth in meters (m); ? is resistivity in ohm meter (?·m); f is frequency of an electromagnetic radiation in hertz (Hz); ?0 is permeability; and ?r is relative permeability of the metallic material.Type: ApplicationFiled: May 6, 2022Publication date: August 18, 2022Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Debasish Banerjee, Songtao Wu, Naohide Uchida, Takeshi Yamakawa, Hidetaka Asano
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Publication number: 20220244436Abstract: A five-layer thin film structure including a reflector, a high refractive index layer on or encapsulating the reflector, and a metallic iron absorber layer on or encapsulating the high refractive index layer. The reflector has a thickness from 10 nm to 5000 nm, the high refractive index layer has a thickness from 5 nm to 500 nm; and the metallic iron absorber layer has a thickness from greater than 0 nm to 50 nm.Type: ApplicationFiled: January 29, 2021Publication date: August 4, 2022Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Debasish Banerjee, Songtao Wu
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Patent number: 11394040Abstract: A passive thermal management system is provided for a fuel cell stack, along with methods for maintaining a uniform temperature across a fuel cell stack during cold weather conditions. The system includes a plurality of fuel cells arranged as a fuel cell stack. The fuel cell stack includes a main body portion defining an exterior surface and having first and second opposing end walls. The system includes a first end frame component having a first phase change material in thermal communication with the first end wall. A second end frame component is provided having a second phase change material in thermal communication with the second end wall. An insulation layer is wrapped around the exterior surface of the main body portion and is provided in thermal communication with the plurality of fuel cells.Type: GrantFiled: September 27, 2019Date of Patent: July 19, 2022Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Tenghua Shieh, Takeo Yamaguchi, Gaohua Zhu, Debasish Banerjee, Swetha Minupuri
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Patent number: 11370358Abstract: A cloaking device comprises an object-side, an image-side, a cloaked region between the object-side and the image-side. An object-side optical component and an object-side tilt correction (TC) component are positioned on the object-side, and an image-side optical component and an image-side TC component are positioned on the image-side. The cloaking device is tilted relative to an object positioned on the object-side such that light from the object is incident on the cloaking device at an acute angle. The object-side TC component redirects light from the object incident on the cloaking device such that the light propagates through the cloaking device generally normal to the object-side and image-side optical components. The image-side TC component redirects light propagating through the cloaking device back to normal to the object to form an image of the object on the image-side of the cloaking device which, if not for the TC components, would be distorted.Type: GrantFiled: April 23, 2018Date of Patent: June 28, 2022Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Kyu-Tae Lee, Songtao Wu, Debasish Banerjee
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Patent number: 11374272Abstract: Thermal management systems include a heat generating device that is to be kept within a desired temperature range. A thermoregulating layer coats, or is otherwise positioned in adjacent proximity to the heat generating device. The thermoregulating layer includes a Ni—Mn based Heusler alloy that exhibits an unprecedented differential in thermal conductivity across a relevant temperature range, based on a martensitic transition from an asymmetric lattice structure to a symmetric lattice structure with increasing temperature.Type: GrantFiled: January 31, 2019Date of Patent: June 28, 2022Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Gaohua Zhu, Qiye Zheng, Debasish Banerjee, David G. Cahill
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Publication number: 20220195201Abstract: A copper oxide coated pigment including a particle having an outer surface, and a layer of copper oxide on the outer surface. The pigment has a reflectivity of electromagnetic radiation in a visible spectrum less than or equal to 5%, and a reflectivity of electromagnetic radiation in a near-IR and LiDAR spectrum greater than or equal to 5%. The particle is cobalt oxide or carbon black. A method for forming copper oxide coated particles includes combining a precipitating agent with a solution of copper nitrate and particles, forming coated particles. The particles are cobalt oxide or carbon black. Washing the particles, obtaining washed coated particles, and filtering the washed coated particles, obtaining filtered coated particles. Drying the filtered coated particles, obtaining dried coated particles, and calcining the dried coated particles to form the copper oxide coated particles.Type: ApplicationFiled: February 5, 2021Publication date: June 23, 2022Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Songtao Wu, Krishna Gunugunuri, Debasish Banerjee
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Publication number: 20220189446Abstract: A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.Type: ApplicationFiled: February 10, 2021Publication date: June 16, 2022Inventors: Xiaoshi Su, Debasish Banerjee, Kai Aizawa, Steven R. Sorenson
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Patent number: 11339495Abstract: A discrete metallic particle having a metallic material, and a coating covering at least a portion of the metallic component. The discrete metallic particle has a thickness from 50 nm to 1000 nm, and the discrete metallic particle has a skin depth ? of greater than or equal to 1.0 ?m in a frequency range from 20-40 GHz. The skin depth ? is calculated by: ? = 2 ? ? ? ( 2 ? ? ? ? ? f ) ? ( ? 0 ? ? r ) ? 503 ? ? ? ? r ? f Where ? is skin depth in meters (m); ? is resistivity in ohm meter (?·m); f is frequency of an electromagnetic radiation in hertz (Hz); ?0 is permeability; and ?r is relative permeability of the metallic material.Type: GrantFiled: May 20, 2020Date of Patent: May 24, 2022Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Debasish Banerjee, Songtao Wu, Naohide Uchida, Takeshi Yamakawa, Hidetaka Asano
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Publication number: 20220148555Abstract: A sound absorbing structure includes a panel having a first side and a second side and at least one acoustic scatterer coupled to a first side of the panel. The panel may be at least partially transparent. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end with the channel open end being in fluid communication with the opening.Type: ApplicationFiled: February 10, 2021Publication date: May 12, 2022Inventors: Xiaoshi Su, Debasish Banerjee, Tomohiro Miwa, Yasushi Hirata, Reimi Emoto