-
公开(公告)号：US20240262986A1
公开(公告)日：2024-08-08
申请号：US18163513
申请日：2023-02-02
Inventor： Abdullah G. AL-SEHEMI , Ahmed A. AL-GHAMDI , Nikolay Todorov DISHOVSKY , Nikolay Todorov ATANASOV , Gabriela Lachezarova ATANASOVA , Irena Kirilova MIHAYLOVA , Petrunka Atanasova MALINOVA
CPC classification number: C08K13/02 , C08L9/06 , C08K2003/2296 , C08K3/30 , C08K5/09 , C08K2201/005
Abstract: A composition of styrene butadiene rubber containing spinel type metal oxides and will find application for insulating layers and supports in flexible antennas that can be worn close to the human body without adversely affecting it. The composition contains spinel-type metal oxides, in which the ingredients per 100 mass parts of styrene butadiene rubber/SBR/are: zinc oxide from 1 to 5 mass parts, stearic acid from 1 to 2 mass parts, filler from 25 to 75 mass parts, vulcanization accelerator/TBBS/—from 1 to 1.5 mass parts, sulfur from 1.5 to 2.0 and the filler is spinel type metal oxides and is Zn0.53Co0.48Mn0.01Cr2O4. The spinel type of metal oxides has the following chemical composition in weight percentages: Cr—62, 10; Mn—0, 19; Co—16, 92; Zn—20, 79, and particle sizes range from submicron 0.2-0.5 μm to 2-3 μm.
-
公开(公告)号：US20240155852A1
公开(公告)日：2024-05-09
申请号：US18053871
申请日：2022-11-09
Applicant: King Khalid University
Inventor： Abdullah G. Al-Sehemi , Richard O. Ocaya , Fahrettin Yakuphanoglu , Ahmed A. Al-Ghamdi , Mohammed A. Assiri , Mehboobali Pannipara
CPC classification number: H01L51/4206 , H01L51/0003 , H01L51/0021 , H01L51/0026 , H01L51/441
Abstract: The present disclosure provides a thin-film sensor including a top layer passivation including top electrical contacts; an active layer disposed under the top layer, the active layer including an active material; a bottom layer passivation disposed below the active layer and including bottom electrical contacts; and a semiconductor layer disposed around the active layer, such that the semiconducting layer sandwiches the active layer.
-
公开(公告)号：US20240021975A1
公开(公告)日：2024-01-18
申请号：US17865661
申请日：2022-07-15
Inventor： Abdullah G. Al-Sehemi , Ahmed A. Al-Ghamdi , Nikolay Todorov Dishovski , Nikolay Todorov Atanasov , Gabriela Lachezarova Atanasova
CPC classification number: H01Q1/273 , H01Q1/12 , A61N1/37229
Abstract: A flexible wearable antenna intended for wireless communications applicable to medical telemetry. The antenna includes of radiating element fractal-based monopole antenna, made up of electrically mechanically connected fractal-based monopoles, connected to a modified coplanar waveguide transmission line with a conductor element connecting the coplanar waveguide ground planes and of the coplanar waveguide transmission line, wherein the coplanar waveguide center line is connected to the radiating fractal-based monopole and is located between the coplanar waveguide ground planes, wherein the small gaps are located between, the feed point is located between the coplanar waveguide center line and the conductor element, wherein a fractal monopole, coplanar waveguide transmission line and feed point are mounted on the flexible substrate, and the antenna attached to the human body 6 and is connected on both points by a wireless connection to an implanted medical device and/or is connected to a wearable communication device and/or is connected to an external communication device.
-
4.发明公开公开(公告)号：US20230221273A1
公开(公告)日：2023-07-13
申请号：US18184355
申请日：2023-03-15
Applicant: Mohd. Shkir , King Khalid University
Inventor： S.M. Al-Moayid , Mohd. Shkir , Haitham Elhosiny Ali , Hamed Majdooa Algarni , Jagadeesha Angadi V , Mohd Ubaidullah , Abdullah M. Al-Enizi
CPC classification number: G01N27/121 , G01N27/125 , B01J19/1862 , B01J19/0066 , B01J6/008
Abstract: The present invention generally relates to a system for preparing reduced graphene-cobalt chromate composite for humidity sensor applications comprises a first glass beaker for pouring 3-7 grams of sucrose; a preheated muffle furnace for heating the first glass beaker containing sucrose for 5-15 minutes at 450-500° C. in an oxygen environment and obtaining the black foam of rGO after hydrating the sugar; a second glass beaker for mixing 3-7 grams rGO, 3-7 grams carbamide, 3-7 grams cobaltous, and 3-7 grams chromium nitrate and dissolving with double-distilled water; and a magnetic stirrer for stirring the mixed solution for 450 minutes to generate a homogenous solution and burning the uniform mixture at 425° C. in the preheated muffle furnace for 20 minutes to obtain graphene-cobalt chromate composite.
-
公开(公告)号：US20190106553A1
公开(公告)日：2019-04-11
申请号：US15819273
申请日：2017-11-21
Applicant: KING KHALID UNIVERSITY (KKU)
Inventor： Abdullah G. AL-SEHEMI , Ahmed A. AL-Ghamdi , Nikolay Todorov Dishovsky , Nikolay Todorov Atanasov , Gabriela Lychezarova Atanasova
Abstract: The subject matter of the present patent application constitutes an elastomer composition intended for embedding a compact antenna designed to be used and operated in close proximity with regard to the human body to build short-range wireless communication links.The elastomer composition for embedding a compact antenna is based on natural rubber and components whose quantities are expressed in parts in wt per 100 parts by weight of natural rubber (phr), namely: sulfur—1 to 2 phr; phenyl-trichloromethylsulfenyl-benzene sulfonamide—0.1 to 0.5 phr; diphenylguanidine—from 0.3 to 0.8 phr; tertiary butyl-benzothiazolyl-sulfenamide—from 1 to 2 phr; dimethylbutyl-phenyl-p-phenylenediamine—1.5 phr; polymerized trimethyl dihydroquinoline—1.5 phr; stearic acid—2.0 phr; zinc oxide—3.0 phr; rapeseed oil—15 to 30 phr; bis (triethoxysilylpropyl) tetrasulfide-silane—from 0.1 to 4.0 phr; 3-thiocyanato-propyl-triethoxy silane—from 2.0 to 6.0 phr; carbon black—5.0 phr; optionally silicon dioxide—from 10 to 50.0 phr, microcrystalline cellulose—from 20.0 to 60.0 phr. The composition of the invention is multilayer.The advantages that the composition intended for embedding a compact antenna provides are: high efficiency when the antenna is placed over or in close vicinity to a human body model or metal surface pattern, a low specific absorption rate SAR (intensity of absorbed radiation) with regard to a human body model when the antenna is placed over or in close proximity to a human body model.
-
Patent Agency Ranking
公开(公告)号：US20250043114A1
公开(公告)日：2025-02-06
申请号：US18363199
申请日：2023-08-01
Inventor： Abdullah G. AL-SEHEMI , Ahmed A. AL-GHAMDI , Nikolay Todorov DISHOVSKY , Nikolay Todorov ATANASOV , Gabriela Lachezarova ATANASOVA , Irena Kirilova MIHAYLOVA , Petrunka Atanasova MALINOVA , Lychezar Nikolaev Radev
Abstract: An elastomeric composite containing an oxide filler, the elastomeric composite will find application in the preparation of substrates and insulating layers for flexible antennas. The composition of the elastomeric composite is based on natural rubber and contains an oxide filler which is calcium silicate phosphate CaO—SiO2—P2O5 in the amount of 25 to 75 parts by mass per 100 parts by mass of rubber, and the other ingredients are zinc oxide, stearic acid, tertiary butyl-benzothiazolyl sulphenamide and sulphur in the following amounts—zinc oxide from 3 to 5, stearic acid from 1 to 3, tertiary butyl-benzothiazolyl sulphenamide from 0.6 to 1 and sulphur from 2 to 3, whereas the amount of the components in the oxide filler CaO—SiO2—P2O5 are the following (in wt. %): CaO—63.70, P2O5—5.97, SiO2—30.33
-
公开(公告)号：US20250012754A1
公开(公告)日：2025-01-09
申请号：US18895140
申请日：2024-09-24
Applicant: CENTRAL LABS-KING KHALID UNIVERSITY
Inventor： Anuj KUMAR , Mohd UBAIDULLAH , Mohd ABOHASAN , Mohd SHKIR , Mohammed S. ALQAHTANI , Hamed Majdooa ALGARNI , Yufeng ZHAO
IPC: G01N27/327
Abstract: The present invention relates to an electrochemical sensor for rapid and accurate detection of Na+ and K+ ions in the human body. The sensor utilizes a crown-ether functionalized graphene-based electrode, developed through innovative synthetic strategies. The process involves engineering graphene with highly selective crown ethers, resulting in a biocompatible, high-quality electrode. This sensor exhibits superior potentiometric detection capabilities for Na+ and K+ ions in extremely small samples. The invention offers a low-cost, highly sensitive, and selective method for monitoring ion concentrations, addressing the need for early identification of diseases caused by Na+/K+ imbalances. Benefits include rapid testing, versatility, and potential applications in personalized medicine and point-of-care diagnostics. This technology overcomes existing obstacles in early disease detection and provides a foundation for advanced biosensor development in healthcare.
-
公开(公告)号：US20250011187A1
公开(公告)日：2025-01-09
申请号：US18886612
申请日：2024-09-16
Applicant: CENTRAL LABS , KING KHALID UNIVERSITY
Inventor： Mohd UBAIDULLAH , Mohd SHKIR , S.M. AL-MOAYID , Hamed Majdooa ALGARNI , Haitham Elhosiny ALI , Yasmin KHAIRY , Jagadeesha Angadi V , Anuj KUMAR , Bidhan PANDIT
IPC: C01G51/00
Abstract: The present invention relates to a method for synthesizing dysprosium-doped cobalt-chromate for supercapacitor applications and a composition for the same, wherein an efficient and cost-effective Solution Combustion synthesis method is utilized for the preparation of Dy-doped CoCr2O4 (CCD). The stoichiometric dissolution of metal and rare earth nitrates, along with fuels, in distilled water forms a green-colored solution, subsequently heated to 450 degrees Celsius. The resulting ash undergoes grinding to yield a fine green pigment with a controlled size of 25 nm. Electrochemical properties of CCD are thoroughly examined through cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. Capacitive behavior, evaluated via various techniques, demonstrates an increase in capacitance with Dy3+ concentration. Density of states calculations reveal improved electronic features after Dy3+ doping, emphasizing enhanced charge storage capabilities. This invention provides insights into an advanced synthesis approach and the electrochemical potential of Dy-doped CoCr2O4 for energy storage applications.
-
公开(公告)号：US20240391793A1
公开(公告)日：2024-11-28
申请号：US18794567
申请日：2024-08-05
Applicant: Central Labs , King Khalid University
Inventor： Mohd. Shkir , Jagadeesha Angadi V , S.M. Al-Moayid , Hamed Majdooa Algarni , Haitham Elhosiny Ali , Yasmin Khairy , Chatham Kumar B , Mohd Ubaidullah , Kamlesh V. Chandekar
Abstract: The present invention relates to a process for preparing lutetium-doped zinc-ferrite ceramics for humidity sensor application and its composition thereof. This invention discloses a composition for lutetium-doped zinc ferrite ceramics, optimized for humidity sensor applications. The composition comprises specified weight percentages of zinc nitrate, iron nitrate, lutetium nitrate, glucose, urea, and optional distilled water. A corresponding synthesis process involves stoichiometric mixing, addition of glucose and urea, stirring with distilled water, and subsequent combustion in a preheated furnace. The ratio of lutetium varies from 0.00 to 0.07. The resulting ZnFe(2-x)LuxO4 nanoparticles exhibit stability and uniformity, confirmed through XRD, FTIR, and SEM analyses. The humidity sensor performance is evaluated, with an optimized Lu=0.05 composition demonstrating a remarkable 93% sensing response. This composition and process offer potential for efficient and stable humidity sensors in various applications.
-
公开(公告)号：US12025577B2
公开(公告)日：2024-07-02
申请号：US18184355
申请日：2023-03-15
Applicant: Mohd. Shkir , King Khalid University
Inventor： S. M. Al-Moayid , Mohd. Shkir , Haitham Elhosiny Ali , Hamed Majdooa Algarni , Jagadeesha Angadi V , Mohd Ubaidullah , Abdullah M. Al-Enizi
CPC classification number: G01N27/121 , B01J6/008 , B01J19/0066 , B01J19/1862 , C01B32/182 , G01N27/125 , H01B1/04
Abstract: The present invention generally relates to a system for preparing reduced graphene-cobalt chromate composite for humidity sensor applications comprises a first glass beaker for pouring 3-7 grams of sucrose; a preheated muffle furnace for heating the first glass beaker containing sucrose for 5-15 minutes at 450-500° C. in an oxygen environment and obtaining the black foam of rGO after hydrating the sugar; a second glass beaker for mixing 3-7 grams rGO, 3-7 grams carbamide, 3-7 grams cobaltous, and 3-7 grams chromium nitrate and dissolving with double-distilled water; and a magnetic stirrer for stirring the mixed solution for 450 minutes to generate a homogenous solution and burning the uniform mixture at 425° C. in the preheated muffle furnace for 20 minutes to obtain graphene-cobalt chromate composite.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.017 seconds)
