Patents by Inventor Woo Y. Lee
Woo Y. Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7238420Abstract: A method for preparing an ?-Al2O3 nanotemplate of fully crystalline ?-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.Type: GrantFiled: June 17, 2004Date of Patent: July 3, 2007Assignee: Trustees of Stevens Institute of TechnologyInventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
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Patent number: 6808760Abstract: A method for preparing an &agr;-Al2O3 nanotemplate of fully crystalline &agr;-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.Type: GrantFiled: May 17, 2002Date of Patent: October 26, 2004Assignee: Trustees of Stevens Institute of TechnologyInventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
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Publication number: 20030054101Abstract: A method for preparing an &agr;-Al2O3 nanotemplate of fully crystalline &agr;-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.Type: ApplicationFiled: May 17, 2002Publication date: March 20, 2003Inventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
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Patent number: 6322889Abstract: A ceramic-matrix composite having a multilayered interfacial coating adapted to protect the reinforcing fibers from long-term oxidation, while allowing these to bridge the wake of advancing cracks in the matrix, is provided by selectively mismatching materials within adjacent layers of the interfacial coating, the materials having different coefficients of thermal expansion so that a low toughness interface region is created to promote crack deflection either within an interior layer of the mismatched interfacial coating or between adjacent layers of the mismatched interfacial coating.Type: GrantFiled: April 22, 1999Date of Patent: November 27, 2001Assignee: The United States of America as represented by the United States Department of EnergyInventors: Edgar Lara-Curzio, Karren L. More, Woo Y. Lee
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Patent number: 5843533Abstract: An article having a multiphase composite lubricant coating of a hard refractory matrix phase of titanium nitride dispersed with particles of a solid lubricating phase of molybdenum disulfide is prepared by heating the article to temperatures between 350.degree. and 850.degree. C. in a reaction vessel at a reduced pressure and passing a gaseous mixture of Ti((CH.sub.3).sub.2 N).sub.4, MoF.sub.6, H.sub.2 S and NH.sub.3 over the heated article forming a multiphase composite lubricant coating on the article.Type: GrantFiled: September 29, 1995Date of Patent: December 1, 1998Assignee: Lockheed Martin Energy Systems, Inc.Inventors: Theodore M. Besmann, Peter J. Blau, Woo Y. Lee, Yong W. Bae
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Patent number: 5709936Abstract: An article having a multiphase composite lubricant coating of a hard refractory matrix phase of titanium nitride dispersed with particles of a solid lubricating phase of molybdenum disulfide is prepared by heating the article to temperatures between 350.degree. and 850.degree. C. in a reaction vessel at a reduced pressure and passing a gaseous mixture of Ti((CH.sub.3).sub.2 N).sub.4, MoF.sub.6, H.sub.2 S and NH.sub.3 over the heated article forming a multiphase composite lubricant coating on the article.Type: GrantFiled: May 15, 1996Date of Patent: January 20, 1998Assignee: Lockheed Martin Energy Systems, Inc.Inventors: Theodore M. Besmann, Peter J. Blau, Woo Y. Lee, Yong W. Bae
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Patent number: 5672420Abstract: A ceramic article which includes a porous body of SiC fibers, Si.sub.3 N.sub.4 fibers, SiC coated fibers or Si.sub.3 N.sub.4 coated fibers, having at least one surface, the article having a coating of AlN adherently disposed throughout at least a portion of the porous body.Type: GrantFiled: March 22, 1996Date of Patent: September 30, 1997Assignee: Lockheed Martin Energy Systems, Inc.Inventors: David P. Stinton, Woo Y. Lee
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Patent number: 5563570Abstract: The present invention relates to a resistor device for controlling a rotational speed of a motor which has no directional property and provides a convenient setting. A resistance unit is positioned which includes at least four connecting points connected to connecting terminals at an upper predetermined position of a housing, and a heat sink having at least four supporting legs is provided to form passing paths open in all directions on the housing. Also, the resistance unit is adhered on the heat sink through an insulating layer, a second heat sink corresponding to the first heat sink is adhered on the resistance unit through the insulating layer, and short-circuit means having a soldered portion to be fused at a predetermined temperature upon an overloading of the motor is provided between the resistance unit and any one terminal.Type: GrantFiled: July 1, 1994Date of Patent: October 8, 1996Assignee: Dong A Electric Parts Co., Ltd.Inventor: Woo Y. Lee
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Patent number: 5550527Abstract: A resistor device for controlling a rotational speed of a resistance unit and an open-circuit means. A receiving recess is provided to any one side surface of a heat sink vertically affixed to a top surface plate of a housing. A resistance unit, which is protected by a film and made of metal material forming a resistor circuit for gradually controlling the rotational speed of a motor, is received within the recess in the heat sink and connected to a terminal. An open-circuit means, having a soldered portion which is fused at a predetermined temperature upon an overload of the motor, is provided at a predetermined distance between the resistance unit and a terminal.Type: GrantFiled: July 1, 1994Date of Patent: August 27, 1996Assignee: Dong A Electric Parts Co., Ltd.Inventor: Woo Y. Lee
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Patent number: 5520748Abstract: A process for manufacturing an Alnico system permanent magnet is disclosed in which the alloy powder of the Alnico system having the proper composition is manufactured through a rapid solidification process, so that the crushability and the formability should be superior, the sintered density should be high, and the magnetic properties should be excellent, as well as cheap in its manufacturing cost and simple in its manufacturing process. An alloy of Alnico system is subjected to a rapid solidification with a spinning solidifier wheel speed of 6-40 m/sec, thereby manufacturing a microcrystalline rapidly solidified powder. The powder is ground into a finer powder, and then a press-forming is carried out. Then a sintering is carried out at a temperature of 1100.degree.-1350.degree. C. for 0.5-4 hours. Then based on a single heat treatment, an external magnetizing force of 1-15 kOe is applied in a temperature range of 600.degree.-1000.degree. C., thereby carrying out a heat treatment under a magnetizing force.Type: GrantFiled: March 9, 1995Date of Patent: May 28, 1996Assignees: Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & TechnologyInventors: Choong J. Yang, Seung D. Choi, Woo Y. Lee, Young G. Son
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Patent number: 5505956Abstract: Disclosed herein is a medicinal adhesive for percutaneous administration of a drug consisting of a support (backing layer), an adhesive layer comprising an oil-soluble drug, an adhesive resin, a penetration enhancer, a water-absorptive material and a lenitive agent, and a separate liner, charaterized in that the adhesive layer has a laminated structure having 2 to 5 layers and each layer has different water absorption capacities, and the drug is a oil-soluble, non-steroidal drug. For the adhesive of the present invention, the lowest layer which is to be contacted with the skin has the lowest water absorption capacity and the most upper layer in contact with the support has the highest water absorption capacity, or vice versa.Type: GrantFiled: April 1, 1994Date of Patent: April 9, 1996Assignee: Pacific Chemical Co., Ltd.Inventors: Jung J. Kim, Woo Y. Lee, Jong W. Ahn, Sang H. Han
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Patent number: 5274351Abstract: The present invention relates to a resistance unit for controlling a motor speed of driving a blower of an automobile air conditioner. The resistance unit includes a resistance circuit board printing a plurality of resistors in the form of double layers on both sides thereof, a supporting plate for mounting the board and a plurality of lead frames each of which is electrically connected to a corresponding terminal of the resistors, and a socket, combined with the supporting plate, taking a part of each lead frame therein.Type: GrantFiled: May 5, 1992Date of Patent: December 28, 1993Inventor: Woo Y. Lee
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Patent number: 5192937Abstract: A resistance unit has a temperature fuse between a resistance and a terminal for deactivating a resistance circuit when the motor reaches the permissible maximum temperature.The resistance unit having resistance connected in series with a plurality of terminals for controlling the speed of a motor comprises at least one temperature fuse electrically interposed between one of the terminals and one end of a corresponding one of the resistances for deactivating the resistance circuit when the resistance unit is overheated.Type: GrantFiled: December 18, 1991Date of Patent: March 9, 1993Assignee: Dong A Electric Parts Co., Ltd.Inventor: Woo Y. Lee
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Patent number: 4920086Abstract: Mixed pillared clays having good thermal stabilities and high surface areas made by liquid phase methods in which an aluminum hydroxy polymer and at least one separate transition metal hydroxy polymer are prepared and mixed with a swelling clay in respective amounts to satisfy selected percentages of the cationic exchange capacity of the clay, are reduced to produce metallic transition metal domains.Type: GrantFiled: April 11, 1988Date of Patent: April 24, 1990Inventors: Rasik H. Raythatha, Bruce Tatarchuk, Woo Y. Lee