Al-Qahtani
Abdullah Al-Qahtani, Riyadh SA
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20150203418 | METHOD FOR OLIGOMERIZATION OF ETHYLENE - The present invention relates to a method for oligomerization of ethylene, comprising the steps: | 07-23-2015 |
Abdullah M. Al-Qahtani, Dammam SA
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20110226455 | Slotted impingement plates for heat exchangers - Impingement plates for shell and tube heat exchangers are positioned between the inlet openings and the tubes with the surfaces of the impingement plates being normal to the flow path of the liquid entering the shell from the inlet openings and having a plurality of openings through which a portion of the liquid passes before contacting the tubes. The openings can be formed as elongated parallel slots that are positioned parallel to the tubes and function to enhance the fluid flow, especially in the area that is immediately downstream from the impingement plates, thereby reducing fluid stagnation, fouling and tube erosion and prolonging the useful life and time in service between maintenance shut downs. | 09-22-2011 |
Abdullah Mohammad Al-Qahtani, Riyadh SA
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20150139896 | SOLAR ENERGY BASED COUNTINUOUS PROCESS AND REACTOR SYSTEM FOR THE PRODUCTION OF AN ALKENE BY DEHYDROGENATION OF THE CORRESPONDING ALKANE - A solar energy based continuous process and reactor system for the production of an alkene by dehydrogenation of the corresponding alkane is performed in a reactor which process comprises alternatingly performing a first mode and a second mode in the same reactor, wherein the first mode is a non-oxidative dehydrogenation wherein the non-oxidative dehydrogenation is performed by contacting the alkane with a suitable dehydrogenation catalyst at a temperature of at least 500° C. to produce the corresponding alkene and hydrogen and wherein the second mode is an oxidative dehydrogenation wherein the oxidative dehydrogenation is performed by contacting the alkane with a suitable dehydrogenation catalyst and an oxidation agent at a temperature from 300 to 500° C. to produce the corresponding alkene wherein the dehydrogenation catalyst for the oxidative dehydrogenation and the non-oxidative dehydrogenation are the same, wherein the heat for the first mode is provided by a solar energy source. | 05-21-2015 |
Ahmed H. Al-Qahtani, Irvine, CA US
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20110300097 | Method And Composition For The Treatment Of Moderate To Severe Keratoconjunctivitis Sicca - The present invention relates to topical ophthalmic compositions for treating or preventing epithelial lesions or ophthalmic disorders, including dry eye or keratoconjunctivitis sicca. | 12-08-2011 |
20120225029 | Skin Cream - The present invention relates to skin care compositions, including cosmeceuticals, for topical application, and more particularly, a skin cream, comprising cell culture medium conditioned by cells grown in two-dimensional culture. Also included are methods of using such compositions and kits comprising the skin cream therein. | 09-06-2012 |
20140099355 | METHOD AND COMPOSITION FOR THE TREATMENT OF MODERATE TO SEVERE KERATOCONJUNCTIVITIS SICCA - The present invention relates to topical ophthalmic compositions for treating or preventing epithelial lesions or ophthalmic disorders, including dry eye or keratoconjunctivitis sicca. | 04-10-2014 |
20150023908 | SKIN CREAM - The present invention relates to skin care compositions, including cosmeceuticals, for topical application, and more particularly, a skin cream, comprising exosomes and cell culture medium conditioned by cells grown in two-dimensional culture. Also included are methods of making and using such compositions and kits comprising the skin cream therein. | 01-22-2015 |
Ali Salim Al-Qahtani, Dhahran SA
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20130048542 | DESULFURIZATION OF HYDROCARBONS BY SOLVENT EXTRACTION - A high sulfur content hydrocarbon feedstream is treated by mixing one or more selected solvents with a sulfur-containing feedstream for a predetermined period of time, allowing the mixture to separate and form a sulfur-rich solvent-containing liquid phase and a crude oil phase of substantially lowered sulfur content, and withdrawing the sulfur-rich stream and regenerating the solvent. | 02-28-2013 |
Ali Salim Al-Qahtani, Dammam SA
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20090107890 | Desulfurization of whole crude oil by solvent extraction and hydrotreating - A high sulfur content crude oil feedstream is treated by mixing one or more selected solvents with a sulfur-containing crude oil feedstream for a predetermined period of time, allowing the mixture to separate and form a sulfur-rich solvent-containing liquid phase and a crude oil phase of substantially lowered sulfur content, withdrawing the sulfur-rich stream and regenerating the solvent, hydrotreating the remaining sulfur-rich stream to remove or substantially reduce the sulfur-containing compounds to provide a hydrotreated low sulfur content stream, and mixing the hydrotreated stream with the separated crude oil phase to thereby provide a treated crude oil product stream of substantially reduced sulfur content and without significant volume loss. | 04-30-2009 |
Bandar Ali Al-Qahtani, Riyadh SA
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20120313062 | CRASH BARRIER WITH OVER-PRESSURE RELIEF SYSTEM - A crash barrier system is provided that generally includes a hydraulic actuator driven piston operably connected to a hydraulic circuit and the crash barrier. In general, the hydraulic circuit includes a normal-UP and normal-DOWN section, an emergency-UP section, and an external pressure relief valve. In order to automatically provide corrective action in the event of an overpressure condition, the external pressure relief valve is connected to the hydraulic circuit. Upon occurrence of condition that causes the hydraulic fluid pressure to exceed a predetermined value, hydraulic fluid is released through the pressure relief valve to maintain the pressure at or below the predetermined value. | 12-13-2012 |
20120315086 | AUXILIARY PRESSURE RELIEF RESERVOIR FOR CRASH BARRIER - A crash barrier system is provided that generally includes a hydraulic actuator driven piston operably connected to a hydraulic circuit and the crash barrier. In general, the hydraulic circuit includes a normal-UP and normal-DOWN section, an emergency-UP section, and an overpressure relief sub-system. In order to automatically provide corrective action in the event of an overpressure condition, the overpressure relief sub-system includes an external pressure relief valve that is connected to the hydraulic circuit. Upon occurrence of condition that causes the hydraulic fluid pressure to exceed a predetermined value, hydraulic fluid is released through the pressure relief valve to maintain the pressure at or below the predetermined value. | 12-13-2012 |
Hussain Al-Qahtani, Dhahran SA
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20120255363 | SYSTEM FOR DUAL PRESSURE SENSING - The sensor includes a deformable diaphragm responsive to applied pressure and a rigid beam mounted to move as the diaphragm deforms. The rigid beam includes a mirrored surface for receiving light from and reflecting light into an optical fiber thereby forming a Fabry-Perot cavity to detect changes in the position of the rigid beam. The rigid beam further includes inter-digital fingers extending from the mirrored surface and moving with the rigid beam with respect to fixed inter-digital fingers to create a change in electrical charges in the fingers to detect changes in the position of the rigid beam thereby providing two measures of rigid beam displacement which are measures of pressure. In a preferred embodiment, the optical fiber is a single mode optical fiber. | 10-11-2012 |
20120285221 | ACOUSTIC PROBE FOR LEAK DETECTION IN WATER PIPELINES - Acoustic system for leak detection. The system includes a disk-shaped probe for insertion into fluid flowing within a pipe. The probe has a convex front surface facing in the flow direction and a substantially flat rear surface. The probe further includes wheels to engage a pipe wall to maintain the probe's orientation within the pipe. At least one pressure sensor is embedded in the probe and is responsive to pressure changes resulting from a leak in the pipe wall. Data collection circuitry is disposed in the probe to receive probe location data and to receive an acoustic signal from the pressure sensor from which the pressure and location of a leak may be determined. | 11-15-2012 |
20140037909 | Actuation and Control of Stamp Deformation in Microcontact Printing - A practical implementation of a flexible and transparent capacitive sensor is disclosed. The results show that, while PDMS is an inherently nonlinear material, linear behavior with minimal hysteresis can be obtained over an appropriately small range of operation. Moreover, high resolution has been achieved during these tests. | 02-06-2014 |
Hussain M. Al-Qahtani, Dhahran SA
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20120103069 | ACOUSTIC LEAK DETECTION SYSTEM AND METHOD WITH ENVIROMENTAL NOISE ISOLATION - The acoustic leak detection system with environmental noise isolation provides for the acoustic detection of leaks in a pipe while minimizing interference from external or environmental noise. The acoustic leak detection system includes a hollow shell adapted for positioning about the pipe to be inspected. A pair of gaskets are circumferentially secured to the inner surface of the hollow shell so that the pair of gaskets bear against the outer surface of the pipe to form an acoustically isolated region defined between the pipe, the pair of gaskets and the inner surface of the hollow shell. An acoustic sensor, microphone or the like is mounted on the hollow shell within the acoustically isolated region for detecting any acoustic signals; i.e., the sound produced by a leak in the pipe within the acoustically isolated region. Upon detection of a leak, an alert signal is generated. | 05-03-2012 |
20140020450 | PIPELINE LEAK DETECTOR - The pipeline leak detector travels through a pipeline passively due to the flow of liquid through the pipeline. The device includes leading and trailing rings shaped to produce hydrodynamic resistance in order for the device to be carried through the pipeline. Wheels are provided about each ring. At least one wheel has an odometer to measure distance traveled through the pipe. The rings are joined by a plurality of axially oriented connecting rods. A plurality of sensing elements extend between the rings. Each sensing element has a thin laminate of a piezoelectric film sandwiched between two electrically conductive layers, and an electrically insulating coating on the outside of each conductive layer. One of the rings, e.g., the trailing ring, includes microelectronic circuitry for data acquisition and storage, e.g., estimates of the magnitude of any leakage encountered, the location of the leakage based upon the odometer travel, etc. | 01-23-2014 |
Mohammed Hussein Al-Qahtani, Jeddah SA
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20140072966 | GENETIC BIOMARKERS FOR GLUCOSE-6-PHOSPHATE DEHYDROGENASE DEFICIENCY - The genetic biomarkers for glucose-6-phosphate dehydrogenase (G6PD) deficiency are five haplotypes representing mutations of the G6PD gene on the X chromosome. Each of these haplotypes codes for more than one non-conservative amino acid change. The present inventors have discovered that when mutations of the G6PD gene result in at least two non-conservative amino acid changes in combination, expression of the G6PD enzyme or the stability of the G6PD enzyme is severely decreased, presenting a substantial risk of disease resulting from the deficiency, even in female patients who would normally be considered asymptomatic carriers of the genetic mutation(s). | 03-13-2014 |
Mushabeb Z. Al-Qahtani, Al-Jubail Industrial City SA
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20090202395 | Pressure control system - The present invention relates to a pressure control system for maintaining the pressure differential between a reactor ( | 08-13-2009 |
Salem Mohammed Al-Qahtani, Dhahran SA
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20130082010 | TANK DEWATERING SENSING AND VALVE CONTROL METHOD AND APPARATUS - A system for separating water from crude oil includes a bulk-storage tank for storing unrefined crude oil, a first pipe for delivering water separated from crude oil in the bulk-storage tank to a containment system, a second pipe for delivering crude oil to a shipping system, a first valve for controlling flow in the first pipe, a second valve for controlling flow in the second pipe, and a control system for controlling operation of the first and second valves. The control system has a control device for controlling the first and second valves, an acoustic sensor array mounted on the first pipe for sensing a sound pressure level during flow of water through the first pipe, means for comparing the sensed sound pressure level with a predetermined sound pressure threshold level characterizing flow of oil-water mixture through the pipe, and a control device for closing the first valve and opening the second valve when the measured sound pressure level reaches the sound pressure threshold level. | 04-04-2013 |