Patent application number | Description | Published |
20090282982 | HOLLOW FIBER, DOPE COMPOSITION FOR FORMING HOLLOW FIBER, AND METHOD OF PREPARING HOLLOW FIBER USING THE SAME - Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyamic acid, and the polyamic acid includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride. | 11-19-2009 |
20090286078 | POLYIMIDES DOPE COMPOSITION, PREPARATION METHOD OF HOLLOW FIBER USING THE SAME AND HOLLOW FIBER PREPARED THEREFROM - Disclosed herein are a polyimide dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyimide dope solution composition comprising polyhydroxyimide, polythiolimide or polyaminoimide, spinning the composition to prepare a hollow fiber, and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. | 11-19-2009 |
20090286904 | POLYAMIC ACIDS DOPE COMPOSITION, PREPARATION METHOD OF HOLLOW FIBER USING THE SAME AND HOLLOW FIBER PREPARED THEREFROM - Disclosed herein are a polyamic acid dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyamic acid dope solution composition comprising polyhydroxyamic acid, polythiolamic acid or polyaminoamic acid, spinning the composition to prepare a hollow fiber, and imidizing and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. | 11-19-2009 |
20090297850 | HOLLOW FIBER, DOPE COMPOSITION FOR FORMING HOLLOW FIBER, AND METHOD OF MAKING HOLLOW FIBER USING THE SAME - Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyimide, and the polyimide includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride. | 12-03-2009 |
20100099804 | POLYMER COMPOUNDS AND A PREPARATION METHOD THEREOF - Disclosed herein are polymer compounds, a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 04-22-2010 |
20100292356 | PREPARATION METHOD OF POLYBENZIMIDAZOLE - Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups and acid dianhydride, obtaining polypyrrolone from the polyaminoimide, subjecting the polypyrrolone to alkaline treatment, and subjecting the alkaline-treated polypyrrolone to heat treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores. | 11-18-2010 |
20110095323 | LIGHT EMITTING DEVICE, LIGHT EMITTING DEVICE PACKAGE, AND LIGHTING SYSTEM - Provided are a light emitting device, a light emitting device package, and a lighting system. The light emitting device comprises a first semiconductor layer comprising a plurality of vacant space parts, an active layer on the first semiconductor layer, and a second conductive type semiconductor layer on the active layer. Each of the plurality of air-lenses has a thickness less than that of the first semiconductor layer. | 04-28-2011 |
20110182470 | MOBILE COMMUNICATION TERMINAL HAVING IMAGE CONVERSION FUNCTION AND METHOD - A mobile communication terminal having an image conversion function arranges and displays area-specific images in a three-dimensional (3D) space on the basis of distance information of the area-specific images of a two-dimensional (2D) image. | 07-28-2011 |
20110195539 | METHOD FOR FORMING SEMICONDUCTOR LAYER AND METHOD FOR MANUFACTURING LIGHT EMITTING DEVICE - A method for manufacturing a light emitting device according to an embodiment of the present invention includes preparing a growth substrate; selectively forming a projection pattern on the growth substrate; forming a first conductive type semiconductor layer on the growth substrate and the projection pattern; forming an active layer on the first conductive type semiconductor layer; forming a second conductive type semiconductor layer on the active layer; and executing an isolation etching for selectively removing the first conductive type semiconductor layer, the active layer, and the second conductive type semiconductor layer including the projection pattern. | 08-11-2011 |
20110230605 | Polymer compounds and a preparation method thereof - Disclosed herein are polymer compounds and a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 09-22-2011 |
20110269857 | POLYMER AND METHOD OF PREPARING THE SAME - Disclosed is a polymer derived from polyamic acid or a polyimide. The polymer derived from polyamic acid or a polyimide includes picopores, and the polyamic acid and the polyimide include a repeating unit obtained from an aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and a dianhydride. | 11-03-2011 |
20110306687 | Polymer compounds and a preparation method thereof - Disclosed herein are polymer compounds and a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 12-15-2011 |
20120042744 | ORGAN TYPE ACCELERATION PEDAL ASSEMBLY EMPLOYING LINEAR BEARING - An organ type acceleration pedal assembly includes a pedal pad that connected to a floor panel below a driver seat by a hinge and swings within a predetermined rotation angle range to accelerate a vehicle. A linear bearing mounted at the center of the rear surface of the pedal pad in a longitudinal direction of the pedal pad moves linearly with the swing of the pedal pad. A pedal arm rotationally fixed to a mounting bracket formed on a dash panel below the driver seat has one end connected to the linear bearing by a hinge so as to move forward and backward with the linear movement of the linear bearing, and another end that adjusts the switching of a throttle valve with the forward and backward movement of the one end. | 02-23-2012 |
20120042777 | GAS SEPARATION USING MEMBRANES COMPRISING POLYBENZOXAZOLES PREPARED BY THERMAL REARRANGEMENT - A method of separating components of a gas mixture, the method comprising: passing the gas mixture through a benzoxazole-based polymer membrane at a temperature of from about 30° C. to about 400° C., wherein the benzoxazole-based polymer membrane is represented by the formula: | 02-23-2012 |
20120092301 | TOUCH SCREEN SYSTEM AND MANUFACTURING METHOD THEREOF - There is provided a touch screen system including: a sensor module including a light emitting unit configured to generate a light signal and a photo detection sensor configured to receive the light signal; a display panel including the sensor module; a front case including a reflection area configured to reflect the light signal generated from the light emitting unit to the photo detection sensor; and a back case connected to the front case with the display panel positioned therebetween. The front case is fixed and connected to the back case and the reflection area is placed at a predetermined position on the display panel. | 04-19-2012 |
20130038716 | METHOD OF INSPECTING A MASK AND APPARATUS FOR PERFORMING THE SAME - In a method of inspecting a mask, an image of a first die in a corrected mask may be obtained. The corrected mask may be corrected using correction data that may include deformation factors related to an exposure process. The first image may be reversely corrected based on correction data. The reversely corrected first image may be compared with a reference image to determine whether the first die may be properly implemented or not. | 02-14-2013 |
20130227419 | APPARATUS AND METHOD FOR SWITCHING ACTIVE APPLICATION - An apparatus to switch an application includes an input unit to receive an input for switching a foreground application, the input including an application distinguishing portion associated with an application switching portion, a control unit to determine an application to be run in the foreground among the applications running in a background, the application distinguishing portion corresponding to the application, and an output unit to output the application in a display as the foreground application. | 08-29-2013 |
20150066778 | DIGITAL CARD-BASED PAYMENT SYSTEM AND METHOD - Disclosed is a digital card-based payment system and method. A digital card-based payment system includes a seller terminal configured to acquire a token from a purchaser terminal desiring to purchase a product and a card management server configured to store and manage one or more pieces of card information and one or more pieces of token information corresponding to the card information and, upon receipt of the token information and payment information for the product from the seller terminal, make payment for the product using card information corresponding to the received token. | 03-05-2015 |