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公开(公告)号：US20240162624A1
公开(公告)日：2024-05-16
申请号：US18552680
申请日：2022-03-04
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh , Weigang Lin , Jie Huang , Min Ding , Wei Li , Kun Wang
CPC classification number: H01Q17/007 , H01Q1/243 , H01Q1/422
Abstract: Anti-reflective assemblies comprise: a high dielectric permittivity substrate comprising a ceramic and a nonporous multilayer anti-reflective film contacting or adhesively bonded to the substrate. The nonporous multilayer anti-reflective film comprises sequential first, second, and third layers of sequentially decreasing dielectric permittivity. Each layer comprises a respective polymer matrix and filler particles.
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公开(公告)号：US11811139B2
公开(公告)日：2023-11-07
申请号：US17043432
申请日：2019-04-04
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Jaewon Kim , Stephen J. Etzkorn , Ronald D. Jesme , Dipankar Ghosh , Mohsen Salehi , Guanglei Du , John A. Wheatley
CPC classification number: H01Q15/10 , H01Q1/3233 , H01Q1/3283 , H01Q1/422
Abstract: Gradient permittivity films are described. In particular, gradient permittivity films including a plurality of layers each having a thickness where at least one layer is perforated and has a different air volume fraction from another of the plurality of layers by at least 0.05. Such films may be useful in improving the signal to noise ratio for transmitting and receiving units operating between 20 GHz and 300 GHz behind a protective cover.
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43.发明申请公开(公告)号：US20210070999A1
公开(公告)日：2021-03-11
申请号：US17054208
申请日：2019-05-14
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh
IPC: C08L83/04 , H02G15/103 , H02G15/064
Abstract: Electric field grading compositions comprise a particulate cupric oxide dispersed in a matrix material, wherein the electric field grading composition has a threshold voltage, a breakdown voltage, and exhibits a reversible electric field switchable current-voltage relationship that substantially follows the equation: I=kVα wherein: I is current in amperes; k is a constant greater than 0; V is applied voltage in volts, wherein V is between the threshold voltage and the breakdown voltage, inclusive; and α is a real number greater than 1. The electric field grading composition is useful for reducing electric field stress at a joint or termination of a conductive substrate. Articles including the electric field grading disposed on a surface of a conductive substrate are also disclosed.
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44.发明授权公开(公告)号：US10932398B2
公开(公告)日：2021-02-23
申请号：US15102863
申请日：2014-12-11
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh
Abstract: Compositions (120), which may be in the form of flexible films, molded bodies, or printable inks, can incorporate ceramic particles (122) comprising titanium monoxide (TiO) for purposes of electromagnetic interference (EMI) shielding at megahertz through gigahertz frequencies. One or more additional ceramic particles can also be included. The compositions comprise a composite material (120) which includes the ceramic particles (122) dispersed within a matrix material (121), such as a polymer. Methods associated with such compositions are also described.
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公开(公告)号：US20200053920A1
公开(公告)日：2020-02-13
申请号：US16344412
申请日：2017-10-26
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh
Abstract: Electromagnetic interference (EMI) shielding composites and methods of making and using the same are described. The composites include high-loading-level ceramic particles distributed in a low-dielectric-loss matrix material having a dielectric loss tangent in the range of about 0.0001 to about 0.005. In one case, the composite includes CuO particles distributed in silicone. The composites exhibit dielectric absorber properties in the high frequency range.
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Patent Agency Ranking
公开(公告)号：US20190326031A1
公开(公告)日：2019-10-24
申请号：US16472148
申请日：2017-12-19
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Craig W. Lindsay , Kenton D. Budd , Dipankar Ghosh , Noah O. Shanti
Abstract: Conductive particles, articles including such particles, and methods of making such conductive particles, are provided; wherein the conductive particles include: a core particle including at least one of a glass, a glass-ceramic, or a metal; surface particles adhered to the core particle; and a metal coating disposed on at least a portion of the core and surface particles; wherein the core particle is larger than the surface particles.
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公开(公告)号：US20190279783A1
公开(公告)日：2019-09-12
申请号：US16418214
申请日：2019-05-21
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh , Biplab K. Roy , Nitin S. Satarkar
Abstract: Polymer composites that are suitable for use as electromagnetic interference mitigaters include a lossy polymeric matrix, ceramic particles dispersed within the polymeric matrix, and conductive particles dispersed within the polymeric matrix. The lossy polymeric matrix may be a fluorocarbon-based polymer matrix, or an epoxy-based polymer matrix. The ceramic particles may be metal oxide particles, especially copper oxide (CuO) particles. The conductive particles may be carbon black. Other electromagnetic interference mitigating polymer matrices include a lossy polymeric matrix and copper oxide (CuO) particles dispersed within the polymeric matrix.
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公开(公告)号：US10386244B2
公开(公告)日：2019-08-20
申请号：US16164941
申请日：2018-10-19
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh , Myungchan Kang , Jaewon Kim
IPC: G01K7/00 , G01K1/00 , G01K7/34 , G01K7/38 , H01B3/12 , C01G23/00 , C01G25/00 , C01G27/00 , C04B35/468 , H01G4/12 , H01L37/02 , H01G7/04 , H01G7/06 , H02G1/00 , C08K3/22
Abstract: A passive temperature-sensing apparatus, which includes a capacitive sensing element that includes a capacitive sensing composition that includes a ferroelectric ceramic material that exhibits a measurable electrical Curie temperature that is below 30 degrees C. The capacitive sensing composition exhibits a negative slope of capacitance versus temperature over the temperature range of from 30 degrees C. to 150 degrees C.
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公开(公告)号：US10340054B2
公开(公告)日：2019-07-02
申请号：US15616272
申请日：2017-06-07
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh , Biplab K. Roy , Nitin S. Satarkar
Abstract: Polymer composites that are suitable for use as electromagnetic interference mitigaters include a lossy polymeric matrix, ceramic particles dispersed within the polymeric matrix, and conductive particles dispersed within the polymeric matrix. The lossy polymeric matrix may be a fluorocarbon-based polymer matrix, or an epoxy-based polymer matrix. The ceramic particles may be metal oxide particles, especially copper oxide (CuO) particles. The conductive particles may be carbon black. Other electromagnetic interference mitigating polymer matrices include a lossy polymeric matrix and copper oxide (CuO) particles dispersed within the polymeric matrix.
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公开(公告)号：US20190049318A1
公开(公告)日：2019-02-14
申请号：US16164941
申请日：2018-10-19
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Dipankar Ghosh , Myungchan Kang , Jaewon Kim
IPC: G01K7/34 , G01K7/38 , C01G25/00 , C01G27/00 , C04B35/468 , H01L37/02 , H01G7/06 , H01G7/04 , H01G4/12 , H01B3/12 , C01G23/00 , C08K3/22 , H02G1/00
CPC classification number: G01K7/34 , C01G23/006 , C01G25/006 , C01G27/006 , C04B35/4682 , C04B2235/3244 , C04B2235/3293 , C08K2003/2237 , G01K7/38 , H01B3/12 , H01G4/1227 , H01G7/04 , H01G7/06 , H01L37/025 , H02G1/00
Abstract: A passive temperature-sensing apparatus, which includes a capacitive sensing element that includes a capacitive sensing composition that includes a ferroelectric ceramic material that exhibits a measurable electrical Curie temperature that is below 30 degrees C. The capacitive sensing composition exhibits a negative slope of capacitance versus temperature over the temperature range of from 30 degrees C. to 150 degrees C.
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