baber/WOPTO huggingface dataset:
Patent KR-19990013767-A (KR)
Title: 통합형 기판 히터 드라이버를 구비한 프린트헤드를 가진 잉크제트 방식의 프린터
IPC: B41J2/01
Filed: 1998-07-10
Abstract: 본 발명은 출력 신호를 제공하는 전기 회로를 포함하는 잉크 제트 방식의 프린터를 지시한다. 프린트헤드(printhead)는 기판, 다수의 잉크 방사 오리피스(orifice)를 구비한 노즐 판(nozzle plate), 상기 다수의 잉크 방사 오리피스와 각각 결합된 다수의 제팅 히터(jetting heater), 및 기판과 결합된 하나 이상의 기판 히터를 포함한다. 기판 히터 드라이버(substrate heater driver)는 프린트헤드에 위치되며, 통합된다. 상기 기판 히터 드라이버는 하나 이상의 입력 및, 에너지를 공급할 수 있는 하나 이상의 출력을 포함한다. 상기 하나 이상의 입력은 전기 회로에 연결되고, 상기 전기 회로로부터의 출력 신호에 상응하는 신호를 수신한다. 에너지를 공급할 수 있는 출력 중 하나는 적어도 하나의 기판 히터에 연결된다. 기판 히터 드라이버는 수신된 신호에 의존하여, 하나 이상의 기판 히터를 선택적으로 작동시키기 위해 구성된다.
Patent KR-19990014048-A (KR)
Title: 산업 차량
IPC: F15B15/20
Filed: 1998-07-22
Abstract: 산업 차량은 프레임(1)과 그 프레임(1)에 회전 가능하게 연결되는 차축(2)을 갖고, 상기 프레임과 차축 사이에 배치된 실린더(7)는 차축(2)의 진동을 흡수하기 위해 선택적으로 연장 및 수축된다. 실린더(7)는 차축(2) 진동에 대해 중심축(3)을 가로지르는 평면 내에서 프레임(1)과 차축(2)에 회전 가능하게 결합된다.
Patent KR-19990014126-A (KR)
Title: 광직접 소자를 갖는 램프 엔벌로프
IPC: C03B11/10
Filed: 1998-07-23
Abstract: 본 발명은 광방사 디바이스용 유리 엔벌로프, 상기 엔벌로프를 포함하는 디바이스, 및 유리재질의 두 시트를 박판화시켜 유리 엔벌로프를 제조하는 방법에 관한 것이다.  상기 두 시트중 하나의 시트는 내부에 연속 채널이 형성되어 있고, 다른 하나의 시트는 내부에 형성된 하나 또는 그 이상의 광학 소자를 갖는다.
Patent KR-20000009809-A (KR)
Title: Method of fabricating trench isolation
Inventor: KIM DONG HYUN
IPC: H01L21/76
Filed: 1998-07-28
Abstract: PURPOSE: The method prevents a nitride liner dent which is generated because the nitride liner is overetched around the edge of the upper region of a trench isolation. CONSTITUTION: A trench(104) is formed by etching a semiconductor substrate(100) using a photoresist pattern defining a trench formation region as a mask, and a thermal oxide(106) is formed on both sides and the bottom of the trench by performing a thermal oxidation process. A nitride film is formed on the semiconductor substrate including the trench, and a trench isolation film(110a-110c) is formed on the semiconductor substrate including the trench to fill the trench fully. The trench isolation film is planarized by etching, and is etched back until the upper surface of the semiconductor substrate on both sides of the trench is revealed. The method prevents the leakage current due to the dent and improves the refresh characteristics of a DRAM and prevents the electrical short between devices.
Patent KR-20000015171-A (KR)
Title: Method of manufacturing a gate insulation layer of a thin film transistor liquid crystal display
Inventor: IM SEONG SIL
IPC: H01L29/786
Filed: 1998-08-27
Abstract: PURPOSE: A method of manufacturing a gate insulation layer of a thin film transistor liquid crystal display is provided to prevent a pin hole caused by a particle remaining on a gate electrode and the glass substrate, the pin hole growing in the succeeding heat treatment process and causing a short-circuit between a gate line and a data line CONSTITUTION: A method of manufacturing a gate insulation layer of a thin film transistor liquid crystal display comprises forming the gate insulation layer having multi-layers of at least two.
Patent KR-20000018713-A (KR)
Title: Receiving circuit in a mobile communications terminal
Inventor: LEE MUN HAENG
IPC: H04B7/26
Filed: 1998-09-04
Abstract: PURPOSE: When a high radio frequency is outputted to improve various transmit/receive services of a terminal in mobile communications, a receiving circuit is provided to prevent the receiving circuit of a terminal from being saturated when the radio frequency is outputted by attenuating, so that the high radio wireless frequency output is not saturated. CONSTITUTION: A low noise amplifier has a GaAs Hetero Junction Field Effect Transistor lowering a noise figure of a radio frequency output, flowing from a duplexer separating a transmitting/receiving radio frequency. A controlling circuit controls bias voltage in the low noise amplifier and an input/out matched circuit obtains a maximum usable voltage gain in an input/output terminal of the low noise amplifier.
Patent KR-20000019076-A (KR)
Title: Method for manufacturing semiconductor device
Inventor: KIM YONG HYUK
IPC: H01L21/306
Filed: 1998-09-08
Abstract: PURPOSE: A method for manufacturing semiconductor device is provided to decrease a leakage current of a semiconductor device by removing a carrier using a lower portion of a wafer. CONSTITUTION: A wafer is depth-etched and a semiconductor is manufactured on the wafer.A rear surface of the wafer is performed by an abrasion process. The wafer which is performed by abrasion process is performed by a heat processing process. The process which performs the depth etching process is a process for forming a trench isolation. The process for completing the semiconductor device forms a last metal wire in a manufacturing line, performs a thermal processing of the wafer, and performing a polyimide process for protecting the semiconductor device.
Patent KR-20000026241-A (KR)
Title: Method for fabricating multilayer interconnection structure by forming stack contact
Inventor: SHIN HEON JONG
IPC: H01L21/28
Filed: 1998-10-19
Abstract: PURPOSE: A method for fabrication multilayer interconnection structure is provided to reduce a contact resistance and a via resistance by using conductive material having a strong penetrating power, to decrease chip size of a memory device by stacking a via hole on a contact hole directly in memory cell area. CONSTITUTION: A conductive area is formed on a substrate(102). A first dielectric(114) is formed on the resultant body. A first and a second contact hole(116,117) are formed by patterning the first dielectric(114) to expose the conductive area. First plugs(118) are filled up in the first and second contact holes(116,117). A first line pattern(120) is formed to contact with the first plug(118) filled in the second contact hole(117). An etching stopper(122) is deposited on the entire surface of the resultant structure. A second dielectric(124) is formed on the etching stopper(122). A first via hole(126) and a second via hole(127) are formed by etching the second dielectric(124) and the etching stopper(122) sequentially. Second plugs(128) are filled in the first and the second via holes(126,127).
Patent KR-20000026527-A (KR)
Title: Method and apparatus for feeding cold air of refrigerator
Inventor: KIM SEOK RO
IPC: F25D17/00
Filed: 1998-10-21
Abstract: PURPOSE: A method is provided to control the cycle of a refrigerator according to the temperature of a refrigerating chamber and to keep the temperature of a door regular. CONSTITUTION: A microcomputer prevents cold air from being fed if a door(6) of a refrigerating chamber is opened. The temperature of the refrigerating chamber is raised by injecting external air or a new load after closing the door. A sensor(3b) detects the temperature of the refrigerating chamber, and then transfers the detected consequence to the microcomputer. The microcomputer drives a compressor if the detected temperature is higher than 3°C. Also, the microcomputer stops the compressor and does not feed the cold air if the temperature is about 3°C. Therefore, the refrigerating chamber is not excessively cold by feeding the cold air under the control of the microcomputer.
Patent KR-20000026653-A (KR)
Title: Method for detecting bit errors using parity and the device thereof
Inventor: JEONG JEONG RYE
IPC: H03M13/23
Filed: 1998-10-22
Abstract: PURPOSE: A method for detecting bit errors using parity is provided to identify a location of a data bit having an error, and to offer an error detecting device when detected data bit having an error is even numbers. CONSTITUTION: A method for detecting bit errors using parity comprises the steps of: generating parity by receiving data by clocks(step1); transmitting the generated parity with the data, and restoring the transmitted parity to the data (step2); and detecting a bit error by comparing the restored data with the transmitted data (step3). The step 1 receives the data by the clocks, delays the data one bit by one bit, operates data of an N bit and an N-1 bit in an Exclusive OR form, makes parity of the N bit, selects as a selection window generated every 8 bit, makes a first bit of the parity having a 8 bit unit have a same value with the data. The step 2 operates the parity of the N bit and restored data of the N-1 bit about the transmitted parity in the Exclusive OR form, restores to the data of the N bit, selects as the selection window generated every 8 bit, and makes the first bit of the data having the 8 bit unit have the same value with the parity. The step 3 detects bits having errors by comparing the transmitted data with the restored data from the parity.
Patent KR-20000030961-A (KR)
Title: Wire bonding equipment
Inventor: CHEON JEONG HWAN
IPC: H01L21/60
Filed: 1998-10-23
Abstract: PURPOSE: A wire bonding equipment is provided to improve reliability on the wire bonding by fixing inner leads as corresponding to the change of a height of inner leads. CONSTITUTION: A heat block(14) located at the lower part of a lead frame(10) contains a groove(30) of storing a semiconductor chip for storing and supporting a semiconductor chip(22) on the upper surface facing to the lower surface of the semiconductor chip. Vacuum absorption holes(32) are formed at the lower surface of the groove of storing the semiconductor chip for being aligned in two rows. Then, the depths of the upper surface of the heat block, which supports inner leads(28) with gap and inner leads(40) without gap are formed differently. Therefore, the inner leads are pressurized in a clamp(16) for stably fixing the fixing block to the inner leads. Wire bonding is performed while fixing the lead frame to prevent deterioration in the reference value of a wire pull value and the generation of a wire open.
Patent KR-20000027973-A (KR)
Title: Adjusting device for receiving teletext in television set
Inventor: EUN SEONG KYU
IPC: H04N7/08
Filed: 1998-10-30
Abstract: PURPOSE: An adjusting device for receiving teletext in a television set is provided an optimum receiver condition to receive teletext by adjusting input gain of intermediate frequency signal. CONSTITUTION: A tuner(2), controlled by a control unit(9), selects a broadcast signal through an antenna(1). An IF(Intermediate Frequency) amplifier(3) increases the selected broadcast signal and offers the signal to a teletext decoder(2') and input level checker(18). After receiving teletext data from teletext decoder(2'), the control unit(9) accepts a level signal from input level checker(18). The control unit(9) compares the level signal with standard level signal stored in a memory(9'). If two level signals are different, the control unit loads input gain correction data and sends a control signal to adjust input gain of IF signal in an input gain adjustment unit(19). Decoded teletext data are stored in the memory(9') and displayed on CRT(Cathode Ray Tube).
Patent KR-20000031526-A (KR)
Title: Apparatus for collecting tape reel vinyl of surface mounter
Inventor: SHIN BYOUNG HYOUN
IPC: H05K13/04
Filed: 1998-11-06
Abstract: PURPOSE: An apparatus for collecting tape reel vinyl of a surface mounter is provided to reduce breakaway of mounted components and to synchronize a slider to a motor. An apparatus according to the present invention results in simplified configuration and improved efficiency. CONSTITUTION: An apparatus for collecting tape reel vinyl of surface mounter includes a first frame(100), a motor(10) rotating repeatedly for a predetermined period, a converter converting rotational force to translational force, a slider(16), a lever(24), a latch(25), a link, an elastic material(14), a support bar(36), and an apparatus for collecting tape reel vinyl. The slider moves back and forth on the converter. The lever is implemented over the whole area of the slider and rotates a latch wheel(22). The latch is implemented on the frame and prevents a motivation wheel(18) from rotating backwards. The link maintains a position of the latch fixing the latch wheel. The elastic material puts the slider faster when the slider moves forward and slows down the slider when the slider returns. The support bar is inserted under the tape reel preceding between covers of the frame. The apparatus for collecting tape reel vinyl is implemented on a second frame(101) located right from the first frame.
Patent KR-19990045329-A (KR)
Title: 네트워크상에 mpeg-2 전송 스트림을 분배하는 방법 및 인터페이스 장치
IPC: H04N7/24
Filed: 1998-11-14
Abstract: 다수 형태의 소비자 장비는 IEEE1394 시리얼 버스등을 사용하여 홈 네트워크내에서 상호 디지털적으로 접속될 것이다. 프로토콜 및 내용 데이터 포맷들은 디지털 비디오 컨퍼런스 카메라의 PC 접속 및 디지털 캠코더 및 DV 덱등의 DVC 장치의 PC 편집 스테이션을 위해 이미 고정되어 있다. 홈 네트워크상의 완료 MPEG-2 전송 스트림의 전송은, 모든 포함된 서비스들이 분배될 필요가 없기 때문에, 거의 대역폭이 낭비된다. 본 발명은 홈 네트워크, 즉, LINK/IEEE 1394 홈 네트워크내의 부분 MPEG-2 전송 스트림의 분배를 위한 널리 응용가능한 해결책을 제공한다.
Patent KR-20000033196-A (KR)
Title: Optical fiber composite ground wire using steel tube
Inventor: SONG PIL SU
IPC: G02B6/44
Filed: 1998-11-20
Abstract: PURPOSE: An optical fiber composite ground wire using a steel tube is provided to prevent galvanic corrosion due to the contact of steel tube and aluminum coated steel wire lest the optical fiber within the tube should be damaged. CONSTITUTION: An optical fiber composite ground wire comprises: a ribbon optical fiber in which at least two optical fibers are horizontally arranged therein and are aggregated; a steel tube enclosing the ribbon optical fiber and on which thin aluminum film is coated; a filler filled within the steel tube; a central wire centered at the inner center of the optical fiber; at least one inner wire aggregated around the central wire; and at least one outer wire enclosing the steel tube and the inner wire. The ribbon optical fiber comprises acryl-coated optical fibers and a jelly layer made of resin filled on the outer surface of the acryl-coated optical fibers and cured by ultra violet rays.
Patent KR-19990063360-A (KR)
Title: 웨이퍼 스택의 불완전 에칭된 비아, 스페이스 및 불완전 연마된 부분 탐지 방법
IPC: G01N21/95
Filed: 1998-12-23
Abstract: 웨이퍼 스택의 불완전 에칭된 비아, 공간 또는 불완전 연마된 부분을 검출하는 방법이 개시되었다.  웨이퍼 스택은 금속층상에 배치된 유전층을 포함한다.  유전층은 복수 개의 비아가 에칭되어 있다.  복수 개의 비아를 포함하는 웨이퍼 스택은 유전층 보다 매우 고속으로 금속층을 에칭하도록 구성된 에천트에 노출된다.  결과적으로, 캐비티는 적절하게 에칭된 비아 아래의 금속층에 형성된다.  그후, 웨이퍼 스택의 비아는, 금속층 내부로 에칭된 캐비티 보다 광을 더 많이 반사시키기 위해 불완전 에칭된 비아를 검출 및 식별하기 위해 광학적으로 검사된다.
Patent KR-20000045517-A (KR)
Title: Method for acidifying stainless steel of martensite group
Inventor: RYU SEUNG GI
IPC: C23G1/08
Filed: 1998-12-30
Abstract: PURPOSE: An acidifying method of martensite stainless steel is provided to prevent a generation of a defective stain. CONSTITUTION: To prevent a defective stain generated in a surface of strip when a stainless steel of martensite group is acidified, a temperature of a mixed acid bath is reduced at 35-45°C and a concentration of nitrogen is reduced at 100-120g/l. The strip is washed with water of a chlorine ion concentration under 35ppm. The strip is dried with an air spray of high pressure. Thereby the stainless steel of martensite group is produced.
Patent KR-20000046134-A (KR)
Title: Double band antenna for round polarized wave
Inventor: JO UN HO
IPC: H01Q21/24
Filed: 1998-12-31
Abstract: PURPOSE: A double band antenna for round polarized wave is provided to reduce the weight of an antenna by equipping an antenna which resonates in high frequency inside of an antenna which resonates in low frequency instead of two separate antennas which resonate in different frequency. CONSTITUTION: A double band antenna for round polarized wave includes the primary cable(100) which sends low frequency signals transmitted from the transmitter of a satellite system. The primary conductor(200) sends and receives the low frequency signals. The primary current supply cable(300) sends the low frequency signals to the primary conductor(200) to send and receive low frequency signals. The secondary cable(400) sends high frequency signal transmitted from the transmitter of the satellite system. The secondary conductor(500) sends and receives the high frequency signals. The secondary current supply cable(600) sends the high frequency signals to the secondary conductor(500) to send and receive high frequency signals.
Patent KR-20010008444-A (KR)
Title: Method for removing defect of wafer
Inventor: KONG YEONG TAEK
IPC: H01L21/02
Filed: 1998-12-31
Abstract: PURPOSE: A method for removing the defect of a wafer is provided to prevent the generation of an extraneous matter on a wafer in the succeeding thermal annealing process by forming a fine nitride barrier on a surface of a wafer. CONSTITUTION: A method for removing a defect of a wafer comprises the following steps. In the wafer comprising a fine defect portion(17) formed on an upper portion and extraneous matter formed within the fine defection portion, a nitride barrier(40) is formed by annealing a deposition material containing nitrogen on a surface of the wafer(10). The deposition material uses any one of NH3, N2O, or NO. The annealing process is performed within one minute to one hour and under the temperature of 500 to 1000 deg.C.
Patent KR-19990067663-A (KR)
Title: 자동차용의 마모 보상 장치를 구비한 마찰 클러치
IPC: F16D13/75
Filed: 1997-09-17
Abstract: 마찰 클러치는 마찰 디스크, 압력 플레이트(1), 커버 플레이트(2), 커버 플레이트(2)와 압력 플레이트(1) 사이에서 작동하는 다이아프램(3)을 포함하는 것으로, 압력 플레이트(1)는 커버 플레이트(2)에 회전식으로 고정되는 반면 커버 플레이트에 대해 축방향으로 변위가능하며, 또한 상기 클러치는 원주방향으로 배치되고 치형(18)의 일 세트에 의해 구동되도록 위치설정된 램프를 갖는 마모 보상 장치를 포함하며, 치형(18)은 그의 주변부에서 지지되며 워엄(13)과 결합하며, 워엄(13)에 회전가능하도록 고정된 래칫 휠(20)은 비리턴 캐치(36)와 함께 제공되어 워엄(13)이 래칫 휠(20)에 의해 회전 구동되는 방향과 반대 방향으로 회전하는 것을 방지하며, 비리턴 캐치(36)는 탄성 부재(31)의 부분이며 또한 래칫 휠(20)을 회전 구동하도록 제어 텅(35)을 지지한다.
Patent KR-19990071487-A (KR)
Title: 선명한색상을나타내는염색필라멘트사
IPC: D01F6/84
Filed: 1997-11-06
Abstract: 유채색으로 염색되어 선명한 색상을 나타내는 방향족 폴리에스테르 필라멘트사로서, 
     상기 실의 필라멘트는 지방족 디카르복실산 성분 및/또는 지방족 디올 성분과 공중합되고 65 ℃ 이하의 유리 전이 온도 (Tg) 를 갖는 방향족 폴리에스테르 중합체로 이루어지고, 
     개별 필라멘트의 세로 방향으로 불균일 염착이 존재함에도 불구하고, 상기 실은 육안으로 볼 때 전체적으로 균일하게 염색된 것처럼 보이며, 
     상기 실은, C. I. Disperse Blue 56 을 주성분으로 하는 분산염료의 1% o.w.f. 수성 분산액으로 염색될 때, L*a*b* 색표시계에 표현된 채도 C* 값이 36 이상인 것을 특징으로 하는, 선명한 색상을 나타내는 염색 필라멘트사.
Patent KR-19990071896-A (KR)
Title: 자전거의 동력변환장치
IPC: B62M11/14
Filed: 1996-12-06
Abstract: 본 발명은 자전거의 양 방향 전진 주행장치에 관한 것으로 페달축(20)과 구동 스프로켓(73) 사이에 구성되며 본 발명은 크게 축 하우징(30), 변환링(40), 캐리어(50), 태양기어(60) 그리고 스프로켓 덮개(70)로 구분할 수 있다. 축 하우징(30)은 회동하는 축을 지지하여 주고 우측캡 테두리의 내면에는 다수의 역전방지쇠(32)가 설치되어 페달을 뒤로 구동할 경우 캐리어(50)를 단속하는 역할을 하고, 변환링(40)은 페달을 뒤로 구동할 경우 축 하우징(30) 내의 역전방지쇠를 개폐하는 역할을 하며, 캐리어(50)는 그 내, 외측면의 일단에 각각 래칫(51,52)이 형성되고 다른 일단에는 다수개의 유성기어(54)가 회동가능하게 부착되어 페달축(20)으로부터의 동력전달 방향을 동일하게 또는 바꾸어서 스프로켓(70)에 전달 하여주고, 태양기어(60)는 페달축(20)에 결합되어 페달축의 구동력을 캐리어(50)에 전달하여 준다. 그리고 스프로켓 덮개(70)는 캡 테두리 내면에 기어가 형성되어 캐리어(50)로부터 동력을 전달받아 페달을 앞, 뒤쪽 구동 방향에 상관없이 항상 앞쪽으로만 회동하게 하는 역할을 한다. 본 발명에 의한 "자전거의 동력변환장치"를 기존의 자전거에 장착한 상태에서 자전거의 페달을 앞쪽으로 구동하면 자전거는 전진주행을 하게 되고, 뒤쪽으로 구동하여도 자전거는 전진주행을 하게 되며, 주행자의 선택에 따라 공회전도 할 수 있도록 한 자전거의 부속장치이다.
Patent KR-19990081823-A (KR)
Title: 카파 길항제 화합물 및 이들의 약제학적 제형
IPC: A61P25/04
Filed: 1997-03-01
Abstract: 본 발명은 카파 오피오이드 길항 활성을 갖는 화합물, 이들 화합물을 함유하는 조성물 및 마취제로서 상기 조성물을 이용하는 방법에 관한 것이다. 
     화학식(I), (II), (III) 및 (IV)의 화합물은 하기의 구조를 갖는다: 
     화학식(I) 
     
       
     
     화학식(II) 
     
       
     
     화학식(III) 
     
       
     
     화학식(IV) 
     
       
     
     상기 식에서, 
     X, X 4 , X 5 , X 6 , X 7 , X 9 ; R 1 , R 2 , R 3 , R 4 ; 및 Y, Z 및 n은 명세서에 정의된 바와 같다.
Patent KR-19990087331-A (KR)
Title: 도어 커플러와 잠금장치
IPC: B66B13/12
Filed: 1997-02-28
Abstract: 본 발명에 있어서, 도어 커플러(4)는 링크장치(2)에 의해 운동되며 랜딩도어 상의 대응부를 파지하도록 디자인된 파지요소(14,15)와, 그리고 폐쇄위치와 개방위치를 가지는 잠금쇠(10)로 구성된다.  폐쇄위치에서 개방위치내로의 잠금쇠(10)의 해제운동은, 파지요소가 대응부에 대해 가압될 때, 허용된다.
Patent KR-19990087400-A (KR)
Title: 출력 형태의 설정을 유연하게 설정할 수 있는 무선 호출장치
Filed: 1997-02-28
Abstract: 본 발명의 무선 호출장치는 출력 형태를 제어하기 위한 제어정보를 기억하는 프로그램 정보 기억부와, 제어정보에 관한 파라미터를 포함하는 무선 메시지를 수신하는 수신부와, 수신된 파라미터와 제어정보에 따라 출력 제어 데이터를 생성하는 프로그램 추출부·실행부와, 생성된 출력제어 데이터에 따라 출력수단을 제어하는 파라미터 제어부를 구비하는 구성이다.  이 구성에 의하면 출력제어를 다채롭고 높은 자유도로 행할 수 있다.
Patent KR-20000004906-A (KR)
Title: Brake regulator having improved joint
Inventor: SIMOND BARKARDI JUANG
IPC: B60T8/18
Filed: 1997-04-03
Abstract: PURPOSE: A brake control valve is provided to change outflow pressure in proportion to the inflow pressure of a brake control valve. CONSTITUTION: The brake control valve for inserting between a hydraulic source(2) and a brake circuit(3), contains:a housing(10) having a bore(11); a hydraulic pressure piston(12) sliding inside the bore, mutually sealing by a circular seal(14) that elastically covers a piston, connecting through a single directional valve(15) inside piston passage and forming a first pressure chamber(13a) and the second pressure chamber(13b) inside; and a tappet(16) applying on the single directional valve.
Patent KR-20000005233-A (KR)
Title: Diesel fuel and lubricating oil antifoams and methods of use
Inventor: GRABOWSKI WOJCIECH
IPC: C09K23/54
Filed: 1997-04-04
Abstract: PURPOSE: A polysiloxane is provided for defoaming diesel fuel and lubrication oil and demulsifing crude oil with improved efficiency. CONSTITUTION: Diesel fuel and lubrication oil are defoamed and crude oil is demulsified by composition comprising copolymers which have structures constituting a backbone of polysiloxane onto which is grafted an organic group. The polysiloxane contains alkyl group (R) of low molecular weight, and is represented by the formula MDxD'yD"zM, where M is O.5Si(CH3)3, D is a OSi(CH3)2, D' is OSi(CH3)R, D" is OSi(CH3)R', R is a polyhydric organic group of C6-C28, R' is a phenol derivative or a long chain aliphatic group or polyethers, z is between 0 and 80, x+y+z is between 10-200, x/z is greater than 1, and x/(y+z) is between about 1 and about 5. Also the polysiloxane is represented by the formula M'DaM' where M' is O.5Si(CH3)2R, a is between 4-10, and R and D are the same as defined above. The polysiloxane exhibits the high stability in diesel fuel where water is dispersed or dissolved.
Patent KR-20000016054-A (KR)
Title: Process for preparing 1,3-alkanediols
Inventor: ARHANCET JUAN PEDRO
IPC: C07C47/19
Filed: 1997-05-29
Abstract: PURPOSE: A selective manufacturing method for 1,3-alkaneediol including PDO from 3-hydroxyalkaneal including HPA by using a fixed layered hydrogenation catalyst is provided. CONSTITUTION: A process for preparing 1,3-alkaneediols via the hydrogenation of 3-hydroxyalkaneals wherein the process comprises passing an aqueous 3-hydroxyalkaneal solution to a hydrogenation zone and in contact with a fixed-bed hydrogenation catalyst under hydrogenation conditions to form an aqueous 1,3-alkaneediol solution, characterized in that the aqueous 3-hydroxyalkaneal solution has a 3 hydroxyalkaneal concentration within the range of 0.2 to 5 wt.%.
Patent KR-20000016717-A (KR)
Title: Mixed transition metal catalyst systems for olefin polymerization
Inventor: CANICH JO ANN MARIE
IPC: C08F4/70
Filed: 1997-06-17
Abstract: PURPOSE: A mixed transition metal catalyst system and an olefin polymerization thereof are provided to include a post transition metal catalyst compound and a metallocene compound. CONSTITUTION: The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late transition metal catalyst systems, transition metal metallocene catalyst systems or Ziegler-Natta catalyst systems. Preferred embodiments include at least one late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure and at least one transition metal metallocene catalyst system comprising a Group 4 metal complex stabilized by at least one ancillary cyclopentadienyl ligand. The polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under polymerization conditions.