baber/WOPTO huggingface dataset:
Patent KR-20000043657-A (KR)
Title: Method for transmitting and receiving control signal and data of vcr
Inventor: KWAK HYO MYEONG
IPC: G11B20/10
Filed: 1998-12-29
Abstract: PURPOSE: A method for transmitting and receiving a control signal and data of a VCR is provided to reduce pins for data inputting port with detecting broadcasting methods(NTSC, PAL-M/PAL and so on) by transmitting and receiving the control signal and data with a clock signal and data. CONSTITUTION: A finishing of transmission is checked after transmitting data to the processing unit of an audio/video signal in the transmitting condition. The transmitting operation of data is performed during continuously transmitting. An off condition of power is checked when the transmission is finished. A condition to transmit data from the microcomputer to the processing unit of the audio/video signal is checked when the power is not in the off condition. The power is turned off when the power is in the off condition. A condition to transmit data from the processing unit of the audio/video signal to the microcomputer is checked when the transmitting condition is not. A finishing of data transmission is checked after transmitting data to the microcomputer in the transmitting condition. The power is turned off in the off condition of power by checking when the transmission is finished.
Patent KR-20000044112-A (KR)
Title: Method of processing holes of upper drum of head drum assembly
Inventor: LIM CHAE HWAN
IPC: G11B5/127
Filed: 1998-12-30
Abstract: PURPOSE: A method for processing holes of an upper drum in a head drum assembly is provided to enhance processability and to define the holes on the exact position by processing all of the plural holes on the upper drum in one direction. CONSTITUTION: A guide hole(11) is formed on the central surface to insert a shaft. A boss is extended on the central surface to form a penetrating hole(21) for fixing a rotor with a screw. A flange installed a head chip is extended from the boss(20). The flange defines a hole(31) combined with a screw to fix the head chip and a hole(32) combined a controlling screw to control a gap in fixing the head chip. A guide surface(33) is provided to contact a tape on the outer surface of the flange. Each hole is formed from one direction. The upper drum is processed by a drill(d) moved upward from the bottom as the drum is chucked.
Patent KR-20000044247-A (KR)
Title: Method for frequency hopping capable demodulation in real time
Inventor: KIM JAE HWAN
IPC: H04B1/713
Filed: 1998-12-30
Abstract: PURPOSE: A method for frequency hopping capable demodulation is provided to process a received signal in real time. CONSTITUTION: A method for frequency hopping capable demodulation in real time comprise the steps of: a first frequency synthesizing part that generates the first carrier wave of a certain frequency to generate a synthetic carrier wave for demodulation of the first frequency control signal, which received by a certain control; a second synthesizing part which generates a certain frequency of the second carrier wave to generate a synthetic carrier wave for a modulation of the second frequency control signal, which received by a certain control; a control part, by receiving the signal, generates the first frequency control signal and the second frequency control signal, which transmits a carrier wave to the first and the second frequency synthesizing part, and generates a carrier wave select signal, which selects the first and second carrier wave that is generated by the first and second frequency synthesizing parts; a switch, which creates successive synthesized carrier wave by switching the first carrier wave and the second carrier wave by selection signal; and a demodulation part, which takes in demodulation control signal from the control part and synthetic carrier wave from the switch and demodulates those received signals.
Patent KR-20000044896-A (KR)
Title: Fabrication method of flash memory cell
Inventor: KIM JEOM SU
IPC: H01L27/115
Filed: 1998-12-30
Abstract: PURPOSE: A fabrication method of flash memory cell is provided to enhance coupling ratio and the uniformity of source bonding, thereby improving program speed, erase speed and reliability. CONSTITUTION: A fabrication method of flash memory cell comprises steps of: forming barrier material on a semiconductor substrate; growing an oxide film; removing the oxide film and barrier material to form areas having prescribed depth and forming the areas into sloped shape; forming a tunnel oxide film, a floating gate, a dielectric film and a control gate on the substrate; and injecting impurity ions to form drain areas on the etched area and source areas on the non-etched areas.
Patent KR-19990066923-A (KR)
Title: 산소 절단 및/또는 가열에 사용하기 위한 첨가제 부가된 기체,이것의 조성물 및 사용 방법
IPC: C10L3/00
Filed: 1998-12-31
Abstract: 본 발명은 생산 비용이 낮고, 현재 사용되고 있는 연료 기체에 비해 우수한 절단 및 가열 속도를 제공할 뿐만 아니라, 산소 및 연료 기체 소비가 더 낮은, 산소 절단 및/또는 가열에 사용하기 위한 첨가제 부가된 기체에 관한 것으로서, 이 첨가제 부가된 기체는 기본 성분으로서 방향족 화합물, 파라핀 및 나프텐 화합물을 갖는 화학 물질이 부가된 프로필렌에 의해 수득된다.
Patent KR-19990045758-A (KR)
Title: 개선된 화학발광 １,２-디옥세탄
IPC: C07D305/06
Filed: 1996-10-17
Abstract: 염기에 의해서 개시될 수 있으며, 유기 용매, 수성 제제 중의 염기 및 대기 중의 가스상 염기를 검출하는데 사용될 수 있는 디옥세탄이 제공된다. 
     디옥세탄은 물리적 또는 자연적 방법에 의해서 방출된 염기의 존재를 검출하는 수단으로써 여러 가지 라벨로부터 염기의 방출을 검출하는데, 광검출 장치를 캘리브레이션하며 또한 염기 중에 존재하는 산화제 또는 환원제의 양을 측정하는데 사용될 수 있다.
Patent KR-19990063879-A (KR)
Title: 무단 변속기용 벨트
IPC: F16G5/16
Filed: 1997-07-29
Abstract: 본 발명은 동력 전달을 위해 벨트가 구동 및 피구동 풀리 상에서 통과되는 종류의 무단 변속기용 벨트에 관한 것이다.  벨트는 강성 링(3)을 포함한다. 다수의 강성 제1 요소가 링(3) 상에서 지지되어 링의 원주 방향으로 서로에 대해 인접되도록 정렬된다.  각 요소는, 링의 회전 방향으로 요소의 전방 및 후방을 각각 향한 제1 및 제2 표면(2a, 2b)과, 제1 표면(2a)에 형성된 제1 로킹 엣지(7)와, 제2 표면(2b)에 형성된 제2 로킹 엣지(11)를 갖는다.  각 인접 요소의 제1 및 제2 표면은 서로 접촉 가능하다.  제1 표면(2a)은, 요소의두께가 방사상 내향 방향으로 점차 감소하도록 제1 로킹 엣지의 방사상 내향으로 형성되어 제1 로킹 엣지로부터 연장된 제1 경사면(6)과, 제1 로킹 엣지로부터 방사상 외향으로 형성되어 제1 로킹 엣지로부터 방사상 외향으로 연장된 제1 방사상 외향 면(F)을 포함한다.  제2 표면(2b)은, 로킹 엣지로부터 방사상 내향으로 형성되어 제2 로킹 엣지로부터 방사상 내향으로 연장된 제2 면(10)과, 제2 로킹 엣지의 방사상 외향으로 연장되고 제2 로킹 엣지로부터 방사상 외향으로 연장된 제2 방사상 외향 면(R)을 포함한다.  제2 면(10)은 요소의 두께가 제2 면에서 제2 방사상 외향 면의 두께보다 작도록 제2 방사상 외향 면에 대해 오목하다.  제2 로킹 엣지(11)는 제1 로킹 엣지(7)의 방사상 외향으로 위치되어 인접한 요소의 제1 면과 접촉할 수 있다.  따라서, 요소들 중 인접 요소들은 벨트가 무단 변속기의 풀리 상에서 매끄럽게 통과되도록 서로에 대해 경사질 수 있다.
Patent KR-19990076606-A (KR)
Title: 의약으로서의 트랜스 아포빈카민산 에스테르 유도체
IPC: A61K31/4353
Filed: 1996-12-13
Abstract: 본 발명은 다음 화학식 1로 표시되는 신규 라세미체 및 광학 활성 트랜스 아포빈카민산 에스테르 유도체, 그리고 이의 치료학적으로 적합한 염에 관한 것이다. 
     화학식 1 
     
       
     
     상기 화학식 1에서 : R은 수소 또는 기로서, 이때 Z는 C 1∼4 알킬기, 광학적으로 치환된 아릴기, 아랄킬기, 헤테로아릴기 또는 14-에버남에니닐기를 나타내고; 그리고 n은 2, 3 또는 4의 정수를 나타낸다. 
     또한, 본 발명은 상기 화합물을 포함하는 약제학적 조성물, 그리고 상기 화합물 및 조성물의 제조방법을 포함하며, 치료방법 역시 본 발명에 포함된다.     상기 화학식 1의 신규 화합물은 항건망증 효과 뿐만 아니라, 특히 항산화 및 항허혈 효과를 나타내며, 지질 과산화 억제, 허혈 및 건망증의 방지 또는 치료, 그리고 알쯔하이머병과 같은 다양한 신경퇴화성 질병의 치료에 유용하다.
Patent KR-19990082276-A (KR)
Title: 진공회전건조기
IPC: F26B5/04
Filed: 1997-12-10
Abstract: 회전드럼내로의 고형물의 투입과 회전드럼으로부터의 고형물의 반출을 고형물에 일손을 접촉시키지 않고 실시할 수 있는 진공회전건조기를 제공한다. 
     회전드럼(23)에 가스유통관(46)과 고형물 급배관(56)을 장착한다. 고형물 급배관(56)을 고형물의 공급원과 접속하며, 감압장치(53)에 의하여 가스유통관(46)을 통하여 회전드럼내를 감압하여 건조해야할 고형물을 회전드럼(23)내로 공급한다. 드럼내에서 고형물이 건조된 후, 고형물 급배관(56)을 고형물 흡인반송장치에 접속하고, 가스유통관(46)을 대기압에 개방한다. 회전드럼(23)을 경사진 상태에서 고형물 급배관(56)에 설치된 회전부(56b)를 회전시켜서 고형물속으로 진입시켜, 회전부의 선단으로부터 고형물을 흡인하여 반출한다. 최종적으로는 회전부(56b)의 선단을 회전드럼의 최하부와 대향시켜서 회전드럼내의 거의 모든 고형물을 반출한다.
Patent KR-19990087255-A (KR)
Title: 자기 보상 공진 스위칭 전원 변환기
IPC: H02M3/28
Filed: 1997-02-21
Abstract: 자기 보상 고전압 스위칭 전원 변환기(10)는 변환기(10)의 공진 주파수의 변화를 실시간에서 모니터하고 변환기(10)의 스위칭 트랜지스터(18)를 제어하여 공진 주파수에 대응하는 동작 주파수를 설정한다. 스위칭 트랜지스터(18)의 콜렉터 전압은 모니터되고 트랜지스터(18)는 콜렉터 전압이 최소값으로 감소되고 소정 기준 레벨 이하로 감소될때만 스위칭된다. 이것이 전원 변환기(10)가 고주파수에서 동작하도록하여 크기가 작게하고 무게를 가볍게하고 효율을 좋게한다.
Patent KR-20000010833-A (KR)
Title: Improvement of implantation rates after in vitro fertilization
Inventor: CHWALSZ KRZYSZTOF
IPC: A61P5/34
Filed: 1997-05-07
Abstract: PURPOSE: The aim is to provide an improved method of implantation and/or pregnancy, comprising administering to a female mammal in whom pregnancy is desired. CONSTITUTION: Administered medicine comprises: (a) the amount of a nitric oxide synthase substrate which can increase the level of L-arginine in blood cycle to over about 50-5000 micro mole enough, a nitric oxide donor, or both, optionally in combination with, (b) a progestin, and, (c) optionally, in further combination with an estrogen.
Patent KR-20000051792-A (KR)
Inventor: LEE JEONG SEOP
IPC: C25D11/04
Filed: 1999-01-26
Abstract: PURPOSE: A producing method of a piston rod is provided to produce a rod for a piston having corrosion resistance and abrasion resistance by performing mechanical and electrochemical coating without using a chrome plating method. CONSTITUTION: A rod for a piston is formed of carbon steel containing 0.25-0.47wt% of carbon. Aluminum or aluminum alloy is coated on a steel rod material formed of the steel carbon for piston rod producing. The aluminum-coated steel rod material is processed to adjust the diameter. A bipolar oxidization is performed to remain 5-150 micrometers of an aluminum-coated layer on the aluminum-coated steel rod material. A lubricating corrosion resistant material is impregnated to a porous layer of the bipolar oxidized coated layer. Thereby, a completed rod for a piston is produced.
Patent KR-20000051815-A (KR)
Inventor: KWON HEON WOO
IPC: F02N15/00
Filed: 1999-01-27
Abstract: PURPOSE: A method of manufacturing spline of starter having a stopper is provided to achieve a simplified manufacturing process and improved productivity of pinion shaft while integrally forming the spline and the stopper onto the pinion shaft. CONSTITUTION: A method comprises the steps of forming a stopper portion(3) and a spline portion(2) to a pinion shaft(1) by a forging process, installing the resultant structure to a rotating device so that the helical system spline(4) is forged to the stopper portion(3), and producing a spline, by a rolling process, in the spline portion(2) having a tooth profile which is two times larger than the spline in the stopper portion(3).
Patent KR-20000051976-A (KR)
Inventor: KIM JAE RYONG
IPC: H04N21/431
Filed: 1999-01-28
Abstract: PURPOSE: A method for selecting an initial electronic program guide of a television is provided to check user access habit to use the checked result for determining initial electronic program guide. CONSTITUTION: A method for selecting an initial electronic program guide of a television includes a first through a forth steps. At the first step(S1), user access habit is checked based on the mode change of user preferred electronic program guide mode. At the second step(S2), user preferred electronic program guide mode is searched by connecting to stored electronic program guide mode when the electronic program guide mode is turned on. At the third step(S5), initial electronic program guide mode is set by using the searched electronic program guide mode as an initial mode. At the forth step(S7), the initial electronic program guide mode is displayed on the television screen.
Patent KR-20000055706-A (KR)
Title: Traction motor
Inventor: LEE IN DONG
IPC: H02K3/46
Filed: 1999-02-09
Abstract: PURPOSE: A traction motor is provided to improve the characteristics of the motor and easily wound a coil by improving the winding pattern of the coil wound on the stator of the motor. CONSTITUTION: A slot(3) is formed in a stator(2) which is stacked in a housing(1). An insulating member(4) is installed in the slot(3), and a coil(5) is wound on the stator(2). The drawing lines(6,7) are drawn to the outside of the stator(2). A rotor(8) is installed on the inner side of the stator(2). The diameter of the wound coil(5) is small, and pluralities of coils are wound on the slot(3) of the stator(2). The coils are easily wound on the stator(2) by improving the winding pattern of the coils wound on the stator(2) of the motor.
Patent KR-20000059576-A (KR)
Inventor: KIM BYEONG CHEOL
IPC: H01L21/3065
Filed: 1999-03-05
Abstract: PURPOSE: A temperature controlling apparatus for a semiconductor fabricating equipment is to allow the apparatus to be mounted in the equipment, thereby reducing a size of a clean room and a cost. CONSTITUTION: A temperature controlling apparatus comprises a chamber for receiving a wafer(2) to repeatedly perform a desired process, at least one or more thermoelectric cooling device for generating an endothermic and exothermic phenomenon responding to a flow of current using a peltier effect, a heat exchanger for performing a heat exchanging to maintain a wafer loading portion of the equipment at a constant temperature by the thermoelectric cooling device. In the apparatus, the heat exchanger comprises the thermoelectric cooling device disposed in an electrode at a lower portion of a pedestal(34), a power source for supplying power to the thermoelectric cooling device, a power supplying cable(36) connecting both contacts of the thermoelectric cooling device to the power source, and a control part for controlling the power amount, thereby controlling the heat exchanging operation.
Patent KR-20000059750-A (KR)
Title: Ti sputtering target
Inventor: KIM SU HYANG
IPC: C23C14/34
Filed: 1999-03-08
Abstract: PURPOSE: A Ti sputtering target is provided to prevent a contact hole from overhanging during sputtering by improving a step coverage. CONSTITUTION: A D-target(direction target) controls the direction of a Ti sputtering target to have a vertical crystalline surface(110) or a family type crystalline surface to a surface(110) in a dense filling direction. Thereby, a metal film is deposited equally by a sputtering process. In addition, overhang is prevented from the entrance of a contact hole by crystalline surface control of the target. Thus, the crystalline surface of the Ti sputtering target is replaced instead of the entire sputtering equipment to economize in cost required for a new equipment.
Patent KR-20000060531-A (KR)
Inventor: LEE HYUN SUK
IPC: A61K8/97
Filed: 1999-03-16
Abstract: PURPOSE: Provided is a method for preparing a tea bag for bath, which is simple to use and has various in aroma and effects. The prepared tea bag is good for health of body and mind. CONSTITUTION: The method for preparing a tea bag for bath comprises the steps of: (1) drying herbs in the shade for 1 month to about 0.3 % of moisture content; (2) grinding the dried herbs into 5 mm or less; (3) injecting 1 % of an essential oil (Aroma Therapy Oil) into the ground herbs at 20-30°C for about 15 min; (4) drying the herbs in the shade at 20-30°C for 12 hours; and (5) packing the dried herbs in a net bag, plastic bag and paper bag in triple.
Patent KR-20000061082-A (KR)
Title: Redundancy cell test circuit of memory device
Inventor: BAE SANG SEOP
IPC: G11C29/00
Filed: 1999-03-23
Abstract: PURPOSE: A redundancy cell test circuit of a memory device is provided so that data contrary to cell data of the most outer redundancy cell can be loaded during test mode by installing a bit line so that the contrary data can be entered to a dummy word line installed on the edge of a redundancy cell word line. CONSTITUTION: A redundancy cell test circuit of a memory device has a dummy cell(DCELL) on the edge of a redundancy cell(RCELL). A compensation bit line(/b) having a value contrary to a bit line(b) connected to the redundancy cell located on the most outer edge is connected to the dummy cell. The test circuit includes a switching part(30) which connects a redundancy word line(RWL) of the redundancy cell and a dummy word line(DWL) of the dummy cell adjacent to the redundancy word line electrically, being operated in only test mode. Thus, the test circuit can test all cells under equal condition, by making a value contrary to the data value of the redundancy cell be recorded in the dummy cell in a special test mode.
Patent KR-20000061110-A (KR)
Inventor: JI DAE HUN
IPC: G06K9/20
Filed: 1999-03-23
Abstract: PURPOSE: A method for recognizing a grapheme combination type written Korean alphabet is provided to separate each stroke of the written Korean alphabets and sort the strokes according to an initial consonant, a medial and a final consonant. CONSTITUTION: The method for recognizing a grapheme combination type written Korean alphabet comprises steps of collecting various kinds of written types of 14 consonants to establish a first data base, collecting various kinds of written types of each vowel respectively positioned at a right side and a lower side of an initial consonant to establish a second and third data base, collecting various kinds of written types of some consonants and vowels which a recognized value is changed according to the position to establish a fourth data base, comparing with the first data base to set the initial consonant, compensating a sorting error to re-establish the initial consonant, comparing with the third and fourth data base to set a medial vowel. In the method, if one or more strokes are remained, the remaining stokes is regarded as a final consonant.
Patent KR-20000066077-A (KR)
Inventor: KIM SEON HWA
IPC: G02F1/1335
Filed: 1999-04-13
Abstract: PURPOSE: A reflective substrate assembly of LCD and fabrication method of the same are provided to have optical diffusion function in itself to enhance optical efficiency and being easily fabricated. CONSTITUTION: A reflective substrate assembly of LCD having top/bottom substrates and liquid sealed between the substrates comprises plural uneven portions(60) and a reflective layer(62) formed on the uneven portions. Transparent electrodes are formed on the substrates. The uneven portions(60) have fine uniformless patterns and are formed by spraying abrasive on resin coated on the bottom substrate and then rubbing the resin. A protect layer is further formed on the reflective layer.
Patent KR-19990083558-A (KR)
IPC: C07C29/04
Filed: 1999-04-28
Abstract: 본 발명은, 규산질 지지체상에 지지된 헤테로다중산촉매를 함유하는 촉매조성물의 존재하에, 증기상에서, 에틸렌과 프로필렌의 혼합물을 수화하여, 에탄올과 이소프로판올을 공동-생성하는 방법에 관한 것이다.   본 방법은 혼합 올레핀 원료의 수화반응이 특정 반응조건하에서 수행되는 것을 특징으로 한다.
Patent KR-19990064751-A (KR)
Title: 만능각도 관이음 플렌지
IPC: F16L23/00
Filed: 1999-05-06
Abstract: 본 발명은 배관용 이음부품중 플랜지에 관한 것으로 더욱 상세하게는 배관의 진행 방향을 0°에서 20°까지 범위내에서 미세한 각도로 자유자재로 바꾸어 줄 수 있는 만능각도 관이음 플랜지 일체에 관한 것이다. 
     이를 위하여 본 발명은 두 개가 한조를 이루는 플랜지 사이에 회전할수 있는 쐐기형 디스크를 삽입하고 디스크를 회전시킴으로서 디스크에 주어진 각도에 비례하여 접속하는 관의 중심선 방향을 변경시킨다. 
     지하에 매설되는 오폐수 처리관은 내화학성의 합성수지 재료로 만든 관이다. 매설현장에서 장애물을 피해 빈번한 관로변경을 해야하나 강관과는 달리 합성수지관은 정확한 곡관이 제공되지 않으면 현장에서 임기응변식으로 관을 연결하고 매립해버린다.  지하에 매설되는관은 지상에서의 배관작업보다 지형적, 환경적인 측면에서 뿐만아니라, 경제적인 시공성 등에 있어서도 열등한 조건에 있다. 단순한 플렌지 연결방법에 접속하려는 관의 중심축 각도를 0°에서 20°범위까지 오프셋(offset)을 가할수 있게 함으로서 관접합의 편리한 시공성은 물론 경쟁력과 신뢰성있는 배관결과를 기대할수 있다. 특히 상수도의 누수로 인한 자원손실과 오폐수의 누수로 인한 지하수 오염은 강관 또는 합성수지관을 막론하고 관 연결부품의 미비가 원인 사례가 대부분 이다. 이점은 공칭직경 200mm 이상(2000mm 까지) 의 대구경의 관의 연결시에 해결이 시급한 사항이다.
Patent KR-20000073853-A (KR)
Inventor: KIM DAE JUNG
IPC: H04B7/26
Filed: 1999-05-14
Abstract: PURPOSE: A method for performing a packet hand over in a CDMA mobile communication network is provided to update a state of virtual connection information between a mobile station and a new base station controller when the packet hand over occurs at a dormant state while the mobile station performs a packet data service, so as to successively supply services. CONSTITUTION: A mobile station(20) transmits a hand over registration message to a new base station controller(30). A basic station controller(BSC) main processor(BMP)(32) controls an air termination processor(ATP)(34), and maps a medium access control(MAC) identification(ID) and a corresponding base station transmitting system. The BMP(32) is a main call processing processor which processes an L3 signaling message in the base station controller. The ATP is a processor which performs a radio link protocol(RLP) of a wireless section. The mobile station successively performs packet data services. The new base station controller performs the packet data services when the hand over occurs in a zone based registration mode.
Patent KR-20000005675-A (KR)
Inventor: FRANKHEOBEOTS
IPC: G06F12/08
Filed: 1999-05-17
Abstract: PURPOSE: A device and a method are provided to schedule a thread in a multiple processor system by measuring a cache footprint of each thread for each processor. CONSTITUTION: The method for scheduling a thread on each processor in a computer system which has plural processors each having a correlation cache, the method comprises the steps of: a) measuring a cache footprint for each thread of each processor; and b) determining a flexibility for each thread of each processor by use of each cache footprint determined in the step (a), wherein an execution of each thread on each processor is performed according to the flexibility of each thread.
Patent KR-20000074780-A (KR)
Inventor: YOO JONG SIK
IPC: G09F11/12
Filed: 1999-05-25
Abstract: PURPOSE: An advertising device is provided in which an advertising film is transferred to right and left as well as to front and back, therefor, an advertising draft can be transferred to the right and the left and can be magnified and diminished. CONSTITUTION: The advertising device comprises a rectangular box(1) on the surface of which a perspective window is adhered, rollers(2a)(2b) mounted on both sides of the box(1), a film(8) transferred by the rollers(2a)(2b), wherein the roller's section forms ellipticity and a plurality of irregularities is formed to the perspective window. In the center of the box(1), a plurality of reflection plates(10a) is mounted.
Patent KR-20000075335-A (KR)
Inventor: PARK JONG WOOK
IPC: H05B33/14
Filed: 1999-05-31
Abstract: PURPOSE: A low polymer development combination for an organic electroluminescence display is provided to have excellent EL and film processing characteristics. CONSTITUTION: In a low polymer development combination, 9-ethyl-3-carbazole carboxy aldehyde of 2.86g(12.8mmol) and 1.4-phenylene deaceto nytril of 1.0g(6.4mmol) are put in a flask of 100ml, and CH3Cl/EtOH of 80ml is maintained in a nitrogen atmosphere. Sodium ethoxide of 0.24ml is drop and stirred in the mixture during four hours. An orange solid is obtained by adding HCl 10ml to the mixture.
Patent KR-20010001384-A (KR)
Inventor: AN BYEONG YEOL
IPC: F02B41/02
Filed: 1999-06-03
Abstract: PURPOSE: A method for improving the efficiency of an internal combustion engine is provided to enhance efficiency by performing an expansion process under the maximum pressure after relatively sufficient combustion. CONSTITUTION: An ununiform rotation transfer device is formed on a rotary shaft. A rotational force having an ununiform rotational rate is applied to a rotary engine. Perfect combustion is accomplished by extending expansion time more than compression time. After the perfect combustion, adiabatic expansion is carried out. The expansion time is extended by applying the rotational force to reciprocal motion through combination of a crank and a piston. Then, the internal combustion engine is expanded after the perfect combustion.
Patent KR-20010001701-A (KR)
Inventor: BAEK CHAN YEONG
IPC: C21B7/10
Filed: 1999-06-08
Abstract: PURPOSE: A method for controlling cooling state of refractories on bottom side of furnace is proposed to use the refractories stably during its designed period. CONSTITUTION: The control method comprises (i) calculating standard thickness of the remaining material depending on years passed since furnace was used; (ii) comparing such thickness with another thickness of the material remained at present; (iii) controlling flow rate of coolant. During the control stage, the flow rate of coolant is increased in case of the present thickness less than the standard thickness. By the control method, it is possible to prolong the working time and life of furnace and improve durability.