baber/WOPTO huggingface dataset:
Patent KR-20020082891-A (KR)
Title: 페릴렌 유도체계 결정화 개질제
IPC: C09B67/20
Filed: 2001-03-10
Abstract: 본 발명은 하기 화학식 I의 페릴린 유도체에 관한 것이다. 
     화학식 I 
     
       
     
     상기 식에서, 
     X 및 Y는 각기 산소, -NR 1 또는 -NR 2 이고, 
     R 1 및 R 2 는 각기 수소, C 1 -C 18 -알킬, C 5 -C 7 -시클로알킬, 아릴 또는 C 1 -C 6 -알콕시이고, 
     R 3 ∼R 10 은 각기 수소, 히드록실 또는 아릴이며, 이때 동일한 탄소 원자에 결합된 라디칼들은 =O 또는 =CHR 11 일 수도 있으며, 
     R 11 은 수소 또는 C 1 -C 3 -알킬이고, 
     단, 상기 페릴렌 유도체 I은 분자 1개당 1∼3개의 카르보닐기를 함유한다.
Patent KR-20030005315-A (KR)
IPC: H04N7/24
Filed: 2001-03-01
Abstract: 압축측에 있어서, 입력될 아날로그 신호(101) 중에서 미분 절대값이 소정값 이하가 되는 점(102a∼102f)을 표본점으로하여, 해당 각 표본점에 있어서의 이산적인 진폭 데이터와 각 표본점간의 시간간격을 나타내는 타이밍 데이터의 조를 압축 데이터로서 얻을 수 있도록 함과 동시에, 압축 해제측에 있어서 상기 압축 데이터 중에 포함될 진폭 데이터와 타이밍 데이터를 사용하여, 연속하는 두 개의 표본점에 있어서의 두 개의 진폭 데이터와 그 사이의 타이밍 데이터를 기초로 하여, 상기 두 개의 진폭 데이터 간을 보간하는 보간 데이터를 구하는 것에 의해 압축 해제 데이터를 얻을 수 있도록 하는 것에 의해, 시간축상의 신호를 압축·압축 해제할 때에 주파수변환을 행하지 않고 시간축상 그대로 처리할 수 있도록 한다.
Patent KR-20030005372-A (KR)
IPC: H01L21/60
Filed: 2001-05-21
Abstract: 칩 보유 지지 공구와 기판 보유 지지 스테이지를 갖는 칩 실장 장치에 있어서, 칩 보유 지지 공구 및 기판 보유 지지 스테이지 중 적어도 한 쪽을, 칩 또는 기판의 위치를 거친 조정하는 조동 테이블 상에 설치하는 동시에, 상기 조동 테이블에 조조정 후의 조동 테이블의 위치를 고정하는 브레이크 수단을 마련하고, 또한 조동 테이블 상에 칩 또는 기판의 위치를 미조정하는 미동 수단을 마련한 칩 실장 장치 및 그 칩 실장 장치에 있어서의 얼라인먼트 방법.  본 발명에 의해, 서브미크론 레벨인 고정밀도의 얼라인먼트가 가능해지고, 그 고정밀도 얼라인먼트를 신속하게 행할 수 있어, 칩 실장에 있어서의 택트 타임을 대폭으로 단축할 수 있다.
Patent KR-20030022140-A (KR)
Title: Method for regenerating a particle filter and devie therefor
IPC: F01N3/023
Filed: 2001-06-06
Abstract: A process for regenerating a particulate filter placed in an exhaust gas line of an internal combustion engine including burning particles emitted during combustion of fuel in the engine and retained in the filter in the presence of an additive containing at least one low-molecular-weight compound including at least two hydroxyl groups and wherein the hydroxyl groups are released in a cold state and an apparatus for regenerating a particulate filter placed in an exhaust gas line of an internal combustion engine, wherein regeneration includes burning particles retained in the filter and emitted during combustion of a fuel in the engine, in the presence of an additive, including a reservoir of an additive solution containing at least one low-molecular-weight compound including at least two hydroxyl groups which are released in a cold state, a meter enabling precise and variable metering of selected quantities of the additive solution injected, a start/stop controller, an electromagnetic injector controller, and pressure regulator driven by and automatically controlled by the engine.
Patent KR-20030038569-A (KR)
Inventor: JUNG DEUK HWAN
IPC: E04G15/06
Filed: 2003-01-07
Abstract: PURPOSE: A drainage processor of a concrete structure is provided to sufficiently drain water by preventing the inflow of concrete into a drain pipe at a pouring of the concrete and the inflow of earth into the drain pipe after finishing a construction. CONSTITUTION: A drain pipe(101) is installed inside a concrete structure to form a weep hole. An inner cap(200) is installed in an inlet of the drain pipe. The inner cap comprises a disk part and a cylindrical pipe inserting part. The disk part has many perforation holes to drain water. The cylindrical pipe inserting part is integrally formed with the disk part. An outer cap(300) is installed in an outlet of the drain pipe. The outer cap comprises a disk part to be contacted and fixed in the inside of a mold(105) and a cylindrical pipe inserting part to be integrally formed with the disk part. Thereby, the inflow of concrete and earth into the drain pipe are prevented. Therefore, the drain function is maintained certainly.
Patent KR-20040064843-A (KR)
Title: Water purifier having sterilizer using electrolysis
Inventor: CHO HAN UK
IPC: C02F1/46
Filed: 2003-01-10
Abstract: PURPOSE: Provided is a water purifier having a sterilizer using electrolysis, which is able to effectively sterilize raw water or purified water. CONSTITUTION: The water purifier comprises a precipitating filter (1) removing particulate substances from water such as service water and underground water, a booster pump (2) increasing hydraulic pressure of the flown-in water, a precarbon filter (3) adsorbing chlorine and oxidizing substances from the water flown-in through the booster pump, a membrane (4) removing heavy metal, ionic substances form the water flown in through the precarbon filter, a postcarbon filter (5) containing water from the membrane and adsorbing gaseous substances dissolved in the water, a sterilizer (110) containing water discharged from the postcarbon filter, equipped between the membrane and a water storage tank (7) and sterilizing microorganism in the water and a water storage tank storing the sterilized water at the sterilizer.
Patent KR-20040064903-A (KR)
Title: Complex rice cooker
Inventor: SON YOUNG SUK
IPC: A47J47/04
Filed: 2003-01-10
Abstract: PURPOSE: A complex rice cooker is provided to meet the convenience of a user by integrating a rice chest and a kimchi refrigerator with a rice cooker. CONSTITUTION: In a rice cooker(1), right and left doors(3) are installed at the lower part of the rice cooker. A kimchi refrigerator(7) and a rice chest(2) are installed at the rice cooker. Rollers(4) are installed at the bottom(9) of the kimchi refrigerator and the rice chest, and move along rails(10) installed at the bottom of the rice cooker. Multipurpose drawers(8) are installed at the front of the rice cooker.
Patent KR-20040068810-A (KR)
Inventor: CHANG TAE GYUN
IPC: H04N5/225
Filed: 2003-01-27
Abstract: PURPOSE: A domed monitoring camera assembly is provided to prevent a lens assembly from being excessively rotated and accurately adjust the angle of a camera lens. CONSTITUTION: A domed monitoring camera assembly includes a spherical camera assembly(60), a base frame(50), a hemispherical lens guide cover(70), and a fixing member(80). The spherical camera assembly is installed in the monitoring camera assembly such that the end of a camera lens(62) is exposed. The base frame includes a round-shaped lens base(51) on which the camera assembly is rotatably mounted. The hemispherical lens guide cover includes a guide hole(72) into which the end of the camera lens is inserted and guided. The lens guide cover surrounds the lens base. The fixing member presses the lens guide cover against the base frame to fix the lens assembly and lens guide cover.
Patent KR-20040070509-A (KR)
Inventor: KIM GI HAN
IPC: H04N7/10
Filed: 2003-02-03
Abstract: PURPOSE: A digital television with a home networking gateway embedding type is provided to easily construct a home network by embedding a cable modem and a gateway. CONSTITUTION: A cable modem(22) receives cable broadcasting through an external lead-in line, separates a data band and a broadcasting band, and outputs the data band and the broadcasting band. A tuner(21) tunes a broadcasting signal in the broadcasting band separated by the cable modem(22). A gateway(23) transmits network data of the data band separated by the cable modem(22) to a plurality of home network terminals, and provides a network connection channel. A network processing unit(24) connects to the gateway(23), transmits and receives the network data, and provides the network connection channel to a digital television(20).
Patent KR-20040070614-A (KR)
Inventor: JANG SEONG GYEONG
IPC: H04J3/06
Filed: 2003-02-04
Abstract: PURPOSE: A method for resetting the fail safe RLC of a wireless communication system is provided to minimize the failure rate of synchronization between two peer entities. CONSTITUTION: A method for resetting the fail safe RLC of a wireless communication system includes the steps of: determining whether the RLC resetting between the two peer entities is required or not; trying each of the RLC resetting procedure by two peer entities when the RLC resetting is required; and synchronizing the RLC peer entities without making errors.
Patent KR-20040077304-A (KR)
Inventor: CHO JE GWANG
IPC: H03B5/12
Filed: 2003-02-28
Abstract: PURPOSE: A quadrature VCO(Voltage Controlled Oscillator) for varying a phase difference between an in-phase signal and a quadrature signal is provided to vary the phase difference between interface signals and quadrature signals from 0 to 180 degrees by varying an input voltage. CONSTITUTION: A first VCO(41) is used for generating a first output and a second output. A second VCO(42) is used for generating a third output and a fourth output. A first amplifier(43) is controlled by the first current and drives the first and the second outputs of the first VCO in response to the third and the fourth outputs of the second VCO. The second amplifier(44) is controlled by the second current and drives the first and the second outputs of the first VCO in response to the third and the fourth outputs of the second VCO. The third amplifier(45) is controlled by the third current and drives the third and the fourth outputs of the second VCO in response to the first and the second outputs of the first VCO. The fourth amplifier(46) is controlled by the fourth current and drives the third and the fourth outputs of the second VCO in response to the first and the second outputs of the first VCO.
Patent KR-20040080867-A (KR)
Title: Heating device of heater for laver drier capable of acquiring required amount of heat
Inventor: LEE SOON WEON
IPC: F26B3/34
Filed: 2003-03-14
Abstract: PURPOSE: A heating device of a heater for a laver drier is provided to obtain a required amount of heat in drying laver using an electric heater with a low cost. CONSTITUTION: A heating device of a heater for a laver drier is composed of a heating chamber(3) in which an insulator(7) on a heater fixing frame(4) is fixed on a heater and fins(5), and then is connected to a power source(6) to generate heat; and a drying chamber(1) having a conveyer for feeding lavers and temperature sensors. The heat generated from the heating chamber is delivered by blowers(2) to the drying chamber in a predetermined temperature to remove moisture in the lavers on the conveyer.
Patent KR-20040081814-A (KR)
Inventor: KIM GI JUN
IPC: H04B7/26
Filed: 2003-03-17
Abstract: PURPOSE: A method for controlling power at a variable data rate is provided to make a base station preliminarily know information related to an expected power level to be received by an R-SPICH, thereby accurately controlling power by using the R-SPICH. CONSTITUTION: A power level of an R-SPICH(Reverse-Supplemental Pilot Channel) to be transmitted from a current frame is decided by using another power level preliminarily decided for a data rate transmitted from the previous frame of an R-SCH(Reverse-Supplemental Channel), while the R-SPICH is used separately from an R-PICH(Reverse-Pilot Channel) assigned as high as a transmission power level of an R-FCH(Reverse-Fundamental Channel) for supplying different powers according to a variable data rate of the R-SCH. A terminal forwards the data rate transmitting the current frame of the R-SCH through an R-RICH(Reverse-Rate Indicator Channel) to a base station in advance at the same timing as the current frame of the R-SCH.
Patent KR-20030077979-A (KR)
Title: 비수성 2 차 전지용 양극활성물질의 제조방법
IPC: H01M4/52
Filed: 2003-03-18
Abstract: 리튬, 니켈 및 망간을 함유하는 층상 구조의 화합물을 함유하는 비수성 2차 전지용 양극활성물질의 간편한 제조방법이 제공된다. 이 방법은 (1) 디니켈 트리옥시드 및 붕소 화합물로 구성된 군에서 선택된 1 종 이상의 성분 및 (2) 금속원소로 리튬, 니켈 및 망간을 함유하는 1 종 이상의 금속 화합물의 혼합물을 소성하는 것을 포함한다.
Patent KR-20040086864-A (KR)
Inventor: CHAE CHUN JA
IPC: H02J7/00
Filed: 2003-03-22
Abstract: PURPOSE: A generator is provided to obtain a boosted power for an input power by using an oscillating circuit, an antenna, and a simple charging circuit. CONSTITUTION: A generator comprises an oscillating circuit(20), a charging circuit(30), and a battery(40). The oscillating circuit generates a damped wave having a constant waveform by oscillating an output power. The charging circuit charges positive power of the output waveform of the oscillating circuit and negative power of an antenna. The battery stores the power supplied from the charging circuit.
Patent KR-20030088853-A (KR)
Title: 혈관내피세포 기능평가장치
IPC: A61B5/0245
Filed: 2003-03-25
Abstract: 생체의 제 1 부위 (14) 상에 착용되는 커프 (12), 및 상기 생체의 상기 제 1 부위를 압박하기 위해 상기 커프내의 압력을 변경하는 커프 압력 변경부 (12, 16, 18, 24, 26, 50) 를 구비하는 압박 장치 (12, 16, 18, 24, 26, 50; 66); 
     상기 생체의 상기 제 1 부위, 또는 상기 제 1 부위의 말단측상에 위치하는 상기 생체의 제 2 부분으로부터 복수의 심박 동기 맥파들을 포함하는 맥파를 검출하기 위한 맥파 검출 장치 (16, 28); 및 
     각각의 다른 시각에 상기 맥파 검출 장치에 의해 검출되는 상기 맥파 중 심장 박동과 동시에 발생하는 각각의 맥파들의 각각의 후반부 각각의 특징들을 나타내는 복수의 세트들의 제 2 맥파 후반부 정보를 획득하는 맥파 후반부 정보 획득 장치 (42, 52; 70) 를 구비하고, 
     상기 심장 박동과 동시에 발생하는 각각의 맥파들의 상기 각각의 후반부들은 상기 각각의 맥파들의 각각의 피크보다 뒤에 오는 상기 각각의 맥파들의 각각의 부분들이며, 
     상기 맥파 후반부 정보 획득 장치는 상기 압박 장치의 상기 압박에 의해 발생되는 상기 맥파 후반부 정보들의 세트들의 시간적 변화를 제공하는 것을 특징으로 하는 혈관내피세포 기능평가장치 (10) 가 개시된다.
Patent KR-20040083821-A (KR)
Inventor: CHOI BYEONG GUK
IPC: B05D1/28
Filed: 2003-03-25
Abstract: PURPOSE: Provided are a method for coating adhesives which obtains an adhesive layer with uniform thickness without any deformation of a release film, and a method for laminating material using the above coating process. CONSTITUTION: The method for coating adhesives comprises the steps of: transferring a release film(76) by a forward roller and a backward roller of a coating apparatus; coating adhesives(51) on the bottom of release film(76) while revolving the adhesives in a container(50) in the same direction by a coating roller; and dropping a part of coated adhesives(51) off by gravity to remove while removing a part of remaining adhesives(51) using a regulating bar(70) with a screw-type coil. The method for laminating materials comprises the steps of: adhering A material(92) onto the above obtained release film(76) coated with adhesives(51); and peeling the release film(76) excluding the adhesive layer(56) from the release film(76) composite with A material(92) while adhering B material(131) onto the peeled composite.
Patent KR-20040086706-A (KR)
Inventor: KIM SI BEOM
IPC: H01L27/02
Filed: 2003-04-03
Abstract: PURPOSE: A method for manufacturing an inductor as a passive device in a semiconductor device is provided to omit CMP(Chemical Mechanical Polishing) and to prevent seams and voids by forming the inductor in a trench using bottom-up filling. CONSTITUTION: A barrier metal film(22) and a seed layer(23) are formed on a substrate(21) with a lower structure. A sacrificial layer(24) is formed on the seed layer. A trench is formed to expose the seed layer by selectively etching the sacrificial layer. A metal film is formed on the exposed seed layer by electroplating. An inductor(260) is then formed by isolating the metal film.
Patent KR-20040087353-A (KR)
Inventor: BANG OK SEON
IPC: C12N9/64
Filed: 2003-04-07
Abstract: PURPOSE: Ubiquitin-specific proteases from chick muscle and gene thereof are provided. The enzymes remove ubiquitin bound to p53 protein to stabilize p53 protein in a cell, so that they can be useful for development of anticancer drugs related to p53 protein. CONSTITUTION: The ubiquitin-specific proteases from chick muscle are UBP75a, UBP75b and UBP135, wherein the ubiquitin-specific protease digests protein or peptide bound to ubiquitin by alpha-peptide bond; the ubiquitin-specific protease digests protein or peptide bound to ubiquitin by epsilon-peptide bond; the ubiquitin-specific protease comprises the total or portion of the amino acid sequence of SEQ ID NO:4, SEQ ID NO:5 or SEQ ID NO:6; and UBP75a, UBP75b and UBP135 have molecular weight of 75 kDa, 75 kDa and 135 kDa, respectively. The ubiquitin-specific protease genes are ubp75a, ubp75b and ubp135, wherein the ubiquitin-specific protease genes are isolated from cDNA of chicken; genes ubp75a, ubp75b and ubp135 have the total or portion of the nucleotide sequence of SEQ ID NO:1, SEQ ID NO:2 and SEQ ID NO:3, respectively. The expression vectors pBS-UBP75a, pBS-UBP75b and pBS-UBP135 contains the genes ubp75a, ubp75b and ubp135, respectively.
Patent KR-20030082384-A (KR)
Title: 단추구멍 재봉기구
IPC: D05B3/08
Filed: 2003-04-08
Abstract: 본 발명은 단추구멍 재봉기구에 관한 것으로, 스프레드 길이만큼 초기 스프레드 위치에서 최종 스프레드 위치로 변위하는 변위 구동장치(28b)를 갖는 피가공물 클램프들(13b)을 포함한다. 상기 피가공물 클램프(13b)는 피가공물(35)을 수용하기 위한 지지 플레이트(11b), 및 상기 지지 플레이트(11b) 상에 장착된 클램핑 플레이트(15b)를 포함한다. 상기 클램핑 플레이트(15b)를 동작하는 클램핑 구동장치(28b)는 상기 지지 플레이트(11b)에서 스스로를 지지한다.
Patent KR-20030081133-A (KR)
Title: 무기 ｕｖ 흡수제를 포함하는 조성물
IPC: C09D5/32
Filed: 2003-04-10
Abstract: 본 발명은 무기 UV 흡수제를 포함하는 조성물, 및 그로부터 제조된, 광화학적 분해에 대하여 물질, 특히 플라스틱의 장기간 보호를 위한 코팅에 관한 것이다.
Patent KR-20040090501-A (KR)
Inventor: KIM SUNG JAE
IPC: H04R7/00
Filed: 2003-04-17
Abstract: PURPOSE: A speaker is provided to obtain the clear sound by reducing the deformation of the driving force. CONSTITUTION: A permanent magnet unit(11) is formed by arranging four small permanent magnets in a shape of a ring. A cylindrical voice coil(12) is arranged at a position apart from an inner surface of the permanent magnet unit in order to form the solenoid magnetic field according to the voice current. A cylindrical bobbin(14) is used for supporting the cylindrical voice coil. A vibration plate(15) is adhered to the cylindrical bobbin in order to convert an electric voice signal to sound by vibrating air according to the vibration of the cylindrical bobbin. A thin film(13) is used for covering all sides of the voice coil.
Patent KR-20040091295-A (KR)
Inventor: HONG SEUNG HYEON
IPC: B21B3/00
Filed: 2003-04-21
Abstract: PURPOSE: A method for restraining ridging of Al-Mg-Si alloy sheet is provided to inhibit development of Goss orientation that is a principal cause of ridging and substantially reduce ridging generated on the alloy sheet accordingly by properly controlling shape factors (L/D) under the non-lubrication state in the rough rolling step. CONSTITUTION: The method comprises the process of maintaining a shape factor (l/d) represented in the following mathematical expression 1 in front of rough mill to 1.0 or less and maintaining the shape factor (L/D) in rear of the rough mill to 3.0 or more as maintaining a friction coefficient between rolling rolls and work to 3.0 or more under the non-lubrication state in the rough rolling step when hot-rolling an alloy slab in a process of manufacturing the Al-Mg-Si alloy sheet: L/D=£2(R(Di-Df))¬1/2|/(Di+Df), where L is length of roll projected onto the sheet in rolling roll bite, D is average thickness of the sheet, R is radius of rolling roll, Di is initial thickness of the sheet, and Df is final thickness of the sheet.
Patent KR-20040091821-A (KR)
Inventor: YOON HUI JONG
IPC: B01D46/44
Filed: 2003-04-22
Abstract: PURPOSE: Provided is an intelligent control system for an air cleaner which is able to adequately decide time to clean a filter installed on the air cleaner or to replace the filter. CONSTITUTION: The system comprises steps of (a) measuring the rotation number of a fan inhaling air filtered passed through a filter; (b) comparing the measured rotation number with a predetermined reference value; (c) compensating voltage supplied to a fan motor to allow the rotation of the fan to reach the reference value when the rotation number of the fan is less than the reference value; (d) determining the filter cleaning time of the air cleaner when the compensation voltage value exceeds the predetermined regulation value by comparing the compensation voltage value with the predetermined regulation value; and (e) displaying a data for the filter cleaning time of the air cleaner to be able to identify from the outside of the air cleaner when the filter cleaning time of the air cleaner has been determined.
Patent KR-20040092587-A (KR)
Inventor: CHOI BYEONG GU
IPC: H04W88/12
Filed: 2003-04-24
Abstract: PURPOSE: A conversion module compatible apparatus of a mobile communication RNC(Radio Network Controller), and a method for controlling the same are provided to improve the compatibility of conversion modules by mounting the conversion modules at one mother board regardless of types of the conversion modules. CONSTITUTION: A plurality of conversion modules(7A-7D) are inserted into one mother board and classified for converting connection information . A CRS(Cell Routing and STM-1 interface) logic part(8) receives a signal identifying the kind of the conversion module from the corresponding conversion module to store the signal. A selection control block(9) selects the conversion module to process connection information including VC(Virtual Channel) and VP(Virtual Path) values inputted from an NCP(Network Control Processor) board(2) using kind identifying information inputted from the CRS logic part(8).
Patent KR-20040092845-A (KR)
Inventor: PARK SOO DONG
IPC: A23L1/30
Filed: 2003-04-29
Abstract: PURPOSE: A method of making a taffy product by preparing fermented rice punch(sikhye) by using a Maackia amurensis extract and then heating with chestnut powder and mugwort powder is provided. The product is effective for inhibition or treatment of appetite loss, nausea, emesis, singultus, heartburn, stomachache, diarrhea, gastrointestinal hemorrhage or the like. CONSTITUTION: Maackia amurensis Rupr. et Maxim is cut into a predetermined size, extracted with 18L of water and then boiled with 4kg of rice. The hard-boiled rice is mixed with 4 to 6L of malt water and then fermented at 60deg.C for 3 to 5hr, followed by filtering to give fermented rice punch. The fermented rich punch is heated with chestnut extract at 100deg.C for 25 to 35min and boiled down for 3 to 5min to give taffy. During the manufacture of the taffy, 400 to 600g of raw chestnut powder and 500 to 700g of mugwort powder are added.
Patent KR-20040093577-A (KR)
Inventor: CHO GUK HUI
IPC: C02F1/78
Filed: 2003-04-30
Abstract: PURPOSE: Provided is a device for manufacturing ozone-dissolved water which is able to reduce the deviation of ozone concentration and increase the dissolved ozone efficiency by dispersing heat with a radiation-fin typed discharge tube and injecting air through a dehumidifying device into the discharge tube with a small pump. CONSTITUTION: The device comprises a discharge tube (210) generating ozone by using air flown from the atmosphere, a dehumidifying device (220) removing the moisture contained in the air injected into the discharge tube, an injector (230) injecting the air generated from the discharge tube into raw water to generate ozone dissolved water, a check valve (240) preventing the ozone dissolved water from flowing backward to the discharge tube, a pump (250) supplying raw gas to the discharge tube, a hydraulic pressure control switch (260) switching on and off according to the pressure of the supplied raw water relating to generation of the ozone dissolved water at the injector, a delay timer (270) discharging the ozone remained in the discharge tube and the ozone dissolved water in the injector to the outside and a power supplier (280) supplying power required for the all elements and the system.
Patent KR-20040094130-A (KR)
Inventor: LIM YUN SIK
IPC: B23Q11/10
Filed: 2003-05-02
Abstract: PURPOSE: An apparatus for filtering cutting oil is provided to capable of filtering a large quantity of cutting oil and minimize a mounting area thereof by storing the filtered cutting oil in a clean tank. CONSTITUTION: An apparatus for filtering cutting oil is composed of a magnetic separator(10) for separating metallic chips from the cutting oil, a dirt tank(20) for storing the cutting oil separated from metallic chips or sludge, a first pump(30) disposed above the dirt tank and feeding the cutting oil stored in the dirt tank, a filter unit(50), and a second pump(70). The filter unit has a multi-layered filter(40) therein, and filters the cutting oil fed by the first pump. A connecting pipe(51) connects the center of the filter to a clean tank(60). The clean tank stores the cutting oil filtered by the filter unit. The second pump discharges the cutting oil stored in the clean tank to the outside.