Friestad
Anne-Marie Friestad, Sandnes NO
Patent application number | Description | Published |
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20100186957 | FLUID PRESSURE TRANSMISSION PILL - A pill for wellbore operations, that includes a base fluid; and at least two polymers that interact to form a gelatinous structure characterized as isolating and controllably transmitting hydrostatic pressure between a first wellbore fluid above the pill in a wellbore and a second wellbore fluid below the pill in the wellbore is disclosed. | 07-29-2010 |
20110136701 | HIGH PERFORMANCE WATER BASED FLUIDS - A water based wellbore fluid that includes an aqueous fluid; a micronized weighting agent; a polysaccharide derivative; and at least one fatty acid ester derivative is disclosed. | 06-09-2011 |
Kenneth Friestad, Kristiansand NO
Patent application number | Description | Published |
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20080196209 | Method And Apparatus For Refining A Molten Material - A method for the directional solidification of silicon or other materials. A cooled plate is lowered into a silicon melt and an ingot of solid silicon is solidified downwards | 08-21-2008 |
20080206123 | SILICON FEEDSTOCK FOR SOLAR CELLS - The present invention relates to silicon feedstock for producing directionally solidified silicon ingots, thin sheets and ribbons for the production of silicon wafers for PV solar cells where the silicon feedstock contains between 0.2 and 10 ppma boron and between 0.1 and 10 ppma phosphorus distributed in the material. The invention further relates to directionally solidified silicon ingot or thin silicon sheet or ribbon for making wafers for solar cells containing between 0.2 ppma and 10 ppma boron and between 0.1 ppma and 10 ppma phosphorus distributed in the ingot, said silicon ingot having a type change from p-type to n-type or from n-type to p-type at a position between 40 and 99% of the ingot height or sheet of ribbon thickness and having a resistivity profile described by an exponential curve having a starting value between 0.4 and 10 ohm cm and where the resistivity value increases towards the type change point. Finally the invention relates to a method for producing silicon feedstock for producing directionally solidified silicon ingots, thin sheets and ribbons for the production of silicon wafers for PV solar cells. | 08-28-2008 |
20100034723 | METHOD AND APPARATUS FOR REFINING A MOLTEN MATERIAL - A method for the directional solidification of silicon or other materials. A cooled plate is lowered into a silicon melt and an ingot of solid silicon is solidified downwards. | 02-11-2010 |
Ron Friestad, Laverne, CA US
Patent application number | Description | Published |
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20100240291 | OUTFLOW VALVE POSITION INDICATION - An aircraft cabin pressure control system outflow valve includes a frame, a valve element, and a position sensor. The frame is configured to be mounted on an aircraft exterior skin. The valve element is rotationally coupled to the frame, and is coupled to receive an actuation drive force. The valve element is responsive to the actuation drive force to rotate to a position between a closed position and a plurality of open positions. The position sensor is coupled to the frame and is configured to directly sense rotation of the valve element and supply a position signal representative of valve element position. | 09-23-2010 |
20130099488 | O-RING SHIELD SYSTEM AND METHOD - An O-ring shield system and method of protecting O-rings in a high pressure refrigerant system are disclosed. The system may include first and second pipes coupled together. An O-ring may be disposed on one of the pipes. A compressible shield ring may be positioned upstream a flow of refrigerant from the O-ring. | 04-25-2013 |