Patents Assigned to King Khalid University
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Publication number: 20240021975Abstract: A flexible wearable antenna intended for wireless communications applicable to medical telemetry.Type: ApplicationFiled: July 15, 2022Publication date: January 18, 2024Applicant: The Research Center for Advanced Materials Science, King Khalid University (KKU)Inventors: Abdullah G. Al-Sehemi, Ahmed A. Al-Ghamdi, Nikolay Todorov Dishovski, Nikolay Todorov Atanasov, Gabriela Lachezarova Atanasova
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Patent number: 11523928Abstract: A choanal atresia apparatus for use in prevention of stenosis following choanal atresia repair in patients. Two tubular choanal tubes each have an interior surface and an exterior surface, an anterior end and a posterior end, and a central axis. A plurality of axially spaced apertures in each of the two choanal tubes are for discharging nasal secretion. A strip has opposed ends coupled to the posterior ends of the two choanal tubes respectively. The strip couples the two choanal tubes in a laterally spaced relationship. The choanal tubes and the strip are fabricated of a medical grade plastic.Type: GrantFiled: January 25, 2019Date of Patent: December 13, 2022Assignee: College of Medicine of King Khalid UniversityInventor: Ali Saeed Mohammed Al Qahtani
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Patent number: 11359076Abstract: The disclosure relates to a composition of biocomposite based on natural rubber containing sol-bioglass, which is used and intended for insulating layers and pads in flexible antennas which can be worn in close vicinity with regard to the human body without adversely affecting it. According to the invention, the composition of the biocomposite intended and designed for insulating layers and pads in flexible antennas based on natural rubber is filled with sol-gel derived bioglass amounting to a quantitative range starting from 8 to 50 parts by weight with regard to 100 parts by weight rubber and having following list of remaining ingredients: zinc oxide from 2.5 to 3.5, stearic acid from 1 to 2.5, bis (triethoxysilylpropyl) tetrasulfide from 4 to 6, tertiary butyl-benzothiazolyl sulfenamide from 1 to 2.5, sulfur from 1 to 3 and isopropyl-phenyl-?-phenylene diamine from 0.5 to 1.5.Type: GrantFiled: April 27, 2020Date of Patent: June 14, 2022Assignee: The Research Center for Advanced Materials Science King Khalid University (KKU)Inventors: Abdullah G. Al-Sehemi, Ahmed A. Al-Ghamdi, Nikolay Todorov Dishovski, Lychezar Nikolaev Radev, Irena Kirilova Mihaylova, Petrunka Atanasova Malinova, Nikolay Todorov Atanasov, Gabriela Lychezarova Atanasova
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Patent number: 11214671Abstract: A conductive nanocomposite which contains a mixed polymer matrix which contains a rubber and a polyether, carbon nanoparticles, and transition metal nanoparticles. The conductive nanocomposite has a nonlinear relationship between resistivity and temperature characterized by an exponential increase reaching a peak resistivity followed by an exponential decrease as temperature increases. Also disclosed is a method of forming the conductive nanocomposite involving mixing the components, aging, and pressing. The conductive nanocomposite forms a component of a heater that is self-regulating as a result of the nonlinear relationship between resistivity and temperature of the conductive nanocomposite. The nanocomposite also forms a component of a thermistor.Type: GrantFiled: March 12, 2021Date of Patent: January 4, 2022Assignees: King Abdulaziz University, King Khalid UniversityInventors: Ahmed A. Al-Ghamdi, Abdullah G. Al-Sehemi, Abul Kalam, Aysegul Dere, Fahrettin Yakuphanoglu
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Patent number: 11203684Abstract: A conductive nanocomposite which contains a mixed polymer matrix which contains a rubber and a polyether, carbon nanoparticles, and transition metal nanoparticles. The conductive nanocomposite has a nonlinear relationship between resistivity and temperature characterized by an exponential increase reaching a peak resistivity followed by an exponential decrease as temperature increases. Also disclosed is a method of forming the conductive nanocomposite involving mixing the components, aging, and pressing. The conductive nanocomposite forms a component of a heater that is self-regulating as a result of the nonlinear relationship between resistivity and temperature of the conductive nanocomposite. The nanocomposite also forms a component of a thermistor.Type: GrantFiled: June 24, 2021Date of Patent: December 21, 2021Assignees: King Abdulaziz University, King Khalid UniversityInventors: Ahmed A. Al-Ghamdi, Abdullah G. Al-Sehemi, Abul Kalam, Aysegul Dere, Fahrettin Yakuphanoglu
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Patent number: 11205737Abstract: A photomemcapacitor device comprising a metal oxide semiconductor material is provided. The photocapacitor device comprises a p-n junction and a Schottky junction. A photomemcapacitor is provided for responding to photons at specified wavelengths.Type: GrantFiled: May 3, 2021Date of Patent: December 21, 2021Assignees: KING ABDULAZIZ UNIVERSITY, KING KHALID UNIVERSITYInventors: Abdullah G. Al-Sehemi, Ahmed A. Al-Ghamdi, Abul Kalam, Aysegul Dere, Fahrettin Yakuphanoglu
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Publication number: 20210054175Abstract: The disclosure relates to a composition of biocomposite based on natural rubber containing sol-bioglass, which is used and intended for insulating layers and pads in flexible antennas which can be worn in close vicinity with regard to the human body without adversely affecting it. According to the invention, the composition of the biocomposite intended and designed for insulating layers and pads in flexible antennas based on natural rubber is filled with sol-gel derived bioglass amounting to a quantitative range starting from 8 to 50 parts by weight with regard to 100 parts by weight rubber and having following list of remaining ingredients: zinc oxide from 2.5 to 3.5, stearic acid from 1 to 2.5, bis (triethoxysilylpropyl) tetrasulfide from 4 to 6, tertiary butyl-benzothiazolyl sulfenamide from 1 to 2.5, sulfur from 1 to 3 and isopropyl-phenyl-?-phenylene diamine from 0.5 to 1.5.Type: ApplicationFiled: April 27, 2020Publication date: February 25, 2021Applicant: The Research Center for Advanced Materials Science King Khalid University (KKU)Inventors: Abdullah G. AL-SEHEMI, Ahmed A. AL-GHAMDI, Nikolay Todorov DISHOVSKI, Lychezar Nikolaev RADEV, Irena Kirilova MIHAYLOVA, Petrunka Atanasova MALINOVA, Nikolay Todorov ATANASOV, Gabriela Lychezarova ATANASOVA
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Publication number: 20190106553Abstract: 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.Type: ApplicationFiled: November 21, 2017Publication date: April 11, 2019Applicant: KING KHALID UNIVERSITY (KKU)Inventors: Abdullah G. AL-SEHEMI, Ahmed A. AL-Ghamdi, Nikolay Todorov Dishovsky, Nikolay Todorov Atanasov, Gabriela Lychezarova Atanasova