baber/WOPTO huggingface dataset:
Patent KR-0157222-B1 (KR)
Title: Single-ues disposable molten metal inclusion sensor
Inventor: NAKAJIMA HIDEMASA
IPC: G01N33/20
Filed: 1990-04-27
Granted: 1999-03-30
Abstract: PCT No. PCT/CA90/00140 Sec. 371 Date Oct. 28, 1991 Sec. 102(e) Date Oct. 28, 1991 PCT Filed Apr. 27, 1990 PCT Pub. No. WO90/13014 PCT Pub. Date Nov. 1, 1990.A molten metal inclusion sensor comprises a single use disposable probe which is detachably connected to a support member. The probe may comprise a tube of heat resistant material having an inner electrode mounted on its interior wall and an outer electrode mounted on its exterior wall, the molten metal entering the tube interior through an orifice in its wall past a jet-preventer insert upon its immersion in the molten metal, whereupon the flow of metal with entrained inclusions is monitored by measuring the voltage between the electrodes. Alternatively the tube may be of electrically-conductive heat-resistant material and constitute the inner electrode. The flow may be assisted by a reduced pressure established within the tube, or may be slowed by a positive pressure to maintain the Reynolds number of the flow below 2000. The tube interior is divided by a narrow bore into two compartments so that metal enters one compartment and freezes in the bore so that it cannot enter the second compartment, protecting the vacuum source if provided and establishing the quantity of metal entering the probe. The orifice is closed by a meltable cover and the cover is protected by a meltable shield to enable the probe to be passed through an overlying slag layer without entry of slag to the probe interior. Various suitable materials are disclosed for the electrodes and for the body of the probe which should have a useful life in the bath of about 2 minutes.
Patent KR-940002383-B1 (KR)
Inventor: SHIRAKI MASAO
IPC: D03D49/62
Filed: 1992-03-31
Granted: 1994-03-24
Abstract: 내용 없음.
Patent KR-100291125-B1 (KR)
Title: 신호전송방법및송수신기
Filed: 1992-04-02
Granted: 2001-09-17
Abstract: 선택적으로, 약간의 규칙적으로 배열(interspersed)된 제어 신호 타임 슬롯들로 캐리어가 분할되는 예를 들어, TDMA 시스템과 같은 신호 전송 시스템에 관한 것이다. 상보 사용자들에 의해 이용된 심볼 레이트 및/또는 변조 설계의 유연성을 제공할 수 있도록 하기 위하여, 트래픽 신호 타임 슬롯들은 적어도 두 개의 소정의 기간 중 한 기간을 갖는다. 그러나, 트래픽 신호 타임 슬롯들의 기간(들)과 무관하게, 트래픽 신호 타임 슬롯에 대한 심볼들의 수는 실질적으로 동일하게 유지된다.
Patent KR-100219869-B1 (KR)
Inventor: MICLEJUY WED
IPC: H03K3/356
Filed: 1992-04-10
Granted: 1999-09-01
Abstract: 래치 및 플립플롭내에 사용되는 BICMOS 패스게이트 회로(PSGT3)(PSGT3A)는 패스게이트출력(V OUT )에서 부하커패시턴스(C L )를 순간적으로 충전 및 방전하도록 패스게이트 출력 (V OUT )에 연결된 2극 풀업 트랜지스터 요소(Q1) 및 2극 풀다운 트랜지스터 요소(Q3)를 포함하는 2극 출력회로(Q1,Q3)를 결합한다. 2극 출력회로는 투과동작모드에서 패스게이트입력(V' IN )에 발생한 데이타 신호에 응답하여 패스게이트출력(V OUT )에 증가된 싱킹 및 소싱 출력 구동전류 그리고 싱킹 및 소싱 구동전류의β증폭을 제공한다. 패스게이트 입력(V IN )에 연결된 MOS입력논리회로는 투과동작모드 및 폐쇄동작모드를 이행하기 위하여 클럭신호입력들(CP,CP/)을 포함한다. MOS 입력논리회로(QP3, QP4, QP5, QP6,NAND1)는 2극 출력회로(Q1,Q3)에 연결되고, 패스게이트 출력 (V OUT )에서 발생하는 매 스위칭전이동안 각각의 2극 풀업 및 풀다운 트랜지스터요소중의 하나를 순간적으로 턴온시키기 위하여 2극 풀업 트랜지스터 요소(Q1) 및 2극 풀다운 트랜지스터 요소(Q3)의 도전상태를 제어하도록 구성된다. MOS 입력논리회로는 또한 출력 (V OUT )의 스위칭전이 이후 및 폐쇄동작모드에 있는 동안 2극 풀업 트랜지스터 요소(Q1) 및 2극 풀다운 트랜지스터 요소(Q3)를 턴오프시키도록 구성된다. 최종 래치백 회로(LTBK2)(INV3,INV4)는 출력 데이타신호를 래치시키고 최종출력(V OUT )을 고전위 레벨 전력수준(Vcc)으로 풀업시키기 위하여 패스게이트 출력에 연결된다.
Patent KR-960011493-B1 (KR)
Inventor: TSUYAMA TOSHIAKI
Filed: 1992-04-15
Granted: 1996-08-23
Abstract: 내용없음
Patent KR-100335706-B1 (KR)
Title: 전화장치
IPC: H04M1/253
Filed: 1992-04-29
Granted: 2002-08-14
Abstract: 건물에 설치되어 있는 기지국에, 외부로부터 전화를 걸고 기지국 측에 미리 기억되어 있는 ID를 발신했을 때에 한하여 건물내에 있는 이 ID 및 단말 ID를 등록하고 있는 회원의 자전화기에 호출한 후, 이 기지국을 거쳐서 외부 및 이 자전화기사이에서 통화가 행해지게 함으로써, 자전화기의 위치 등록을 행하지 않아도 외부의 전화기에 의한 이 자전화기에의 호출 및 외부의 전화기 및 자전화기 사이의 통화를 간단한 구성으로 행할 수 있게 한다. 
     자전화기(19b')와, 공중회선 교환기(21)에 접속되어 있는 디지털 무선 전화기(20)와, 공중 회선 교환기(21)에 접속되고 있는 기지국(23)을 가지며, 기지국(23)이 디지털 무선 전화기(20)로부터의 발신 ID를 기억 장치(40)에서 검색할 수 있을 때에 한하여 자전화기(19b') 및 디지털 무선 전화기(20)간의 송수신을 행할 수 있게 한다.
Patent KR-100211616-B1 (KR)
Inventor: TORU TOKIWA
IPC: B65G1/04
Filed: 1992-10-08
Granted: 1999-10-01
Abstract: 막대를 이송하기 위하여 다수의 지지비임으로 구성된 수직 배열 다중 선반이 마련된 선반 프레임을 포함하는 공간 수납 시스템에 있어서, 선반 프레임 위쪽에 설치되고, 막대의 길이방향으로 연신되며, 긴 막대의 길이방향에 수직방향으로 이동하는 가동비임(23)과, 가동비임상에서 수직으로 이동할 수 있도록 장착된 리프트 비임(35)과, 리프트 비임에 부착되며, 막대를 이송하기 위하여, 막대의 길이방향에 수직으로 연신되고, 이송될 막대의 길이에 따라 길이방향으로 개별적으로 또는 동시에 밀려나오고 밀려들어갈 수 있는 다수의 리프트 아암(33)을 포함하는 긴 막대 이송장치에 있다.
Patent KR-100254047-B1 (KR)
Title: Process for preparing isocyanates and isocyanate adduct from haloamines and acid halides
Inventor: GUPTA RAM B
IPC: C07D401/14
Filed: 1992-11-14
Granted: 2000-05-01
Abstract: PURPOSE: Provided is a method for manufacturing isocyanates and isocyanate adducts from amide derivatives induced from haloaminotriazines and acid halides, such as oxalyl chloride, phosgene and phosgene analogues. CONSTITUTION: A method for manufacturing an isocyanate comprises the steps of: contacting a haloaminotriazine with an acid halide selected from the group consisting of oxalyl chloride, phosgene and phosgene analogues at a temperature and for a length of time to produce an acid amide; and decomposing the acid amide to give an isocyanate.
Patent KR-960001447-B1 (KR)
Inventor: TSUJIDA DAMOTSU
IPC: G07D9/00
Filed: 1992-11-23
Granted: 1996-01-30
Abstract: 내용 없음.
Patent KR-960004079-B1 (KR)
Title: Contact hole forming method
Inventor: CHON YOUNG-KWON
IPC: H01L23/52
Filed: 1992-12-19
Granted: 1996-03-26
Abstract: The contact hole for connecting a metal lead to a semiconductor substrate is provided by forming a contact zone on the surface of the substrate, connected to the metal lead and forming a channel in the contact zone. The side walls of the contact zone are insulated from a conductive layer. A contact section of a metal boundary layer is applied to the base and side walls of the channel, and the entire substrate surface is coated with an insulation layer. The contact hole is provided by selective removal of the insulation layer above the groove, and the inserted metal lead is in contact with the boundary layer.
Patent KR-970001538-B1 (KR)
Title: Method for manufacturing water dispersion resin and water-soluble paints composition containing the same
Inventor: KWAK HEE-SUNG
IPC: C09D175/04
Filed: 1992-12-31
Granted: 1997-02-11
Abstract: The water distribution resin is manufactured by (1) reacting monomer of decanol, dodecanol or the like including an activated hydrogen with Diisocyante monomer, (2) adding polyol containing activated hydrogen  and carboxylic acid including activated hydrogen capable of forming salts and forming a free polymer. (3) The produced free polymer is neutralized by amine and then is reacted with chain extender.
Patent KR-950009868-B1 (KR)
Title: Size and phase meseauring device for ac signal
Inventor: YANG TAE-HYON
IPC: G01R19/04
Filed: 1993-02-15
Granted: 1995-09-01
Abstract: a sine wave generator for generating first,  second and third clock signals and a signal of sine function; I/V converting amplifier for receiving a current of the signal of sine function generated in the sine wave generator through a measured object and converting the received current into an alternating voltage, to thereby output a converted signal; an switched capacitor filter for inputting an output signal of the I/V converting amplifier to integrate the output signal into a low pass filter type and for holding the integrated value by an external signal; a first JK-flipflop for toggling the first clock signal during a period of 0-π; a second JK-flipflop for toggling the second clock signal during a period 0-π; a second JK-flipflop for toggling the second clock signal during a period of π/2-3π/2; a logic operation unit for selecting one signal of output signals from the first and second JK-flipflops and then for outputting the selected signal as an inverted signal; a counter for outputting a signal by executing a downcounting operation for an established value; a D-flipflop for holding an integral value of the switched capacitor filter and outputting a signal reading the held value; and first, second and third switching units.
Patent KR-100265447-B1 (KR)
Title: Thermoplastic blends containing graft copolymers of polyacrylates as impact modifiers
Inventor: DENICOLA ANTHONY J JR
IPC: C08L21/00
Filed: 1993-03-29
Granted: 2000-09-15
Abstract: Disclosed are blends comprising a propylene polymer material grafted with a polymerizable monomer(s) of a polymer(s) having a Tg greater than 80 DEG C, a propylene polymer material grafted with a polymerizable monomer(s) of a polymer(s) having a Tg less than 20 DEG C, and optionally at least one other rubber modifier.
Patent KR-950013876-B1 (KR)
Title: Variable coder error processur apparatus
Inventor: CHOE JONG-SIK
IPC: H03M7/40
Filed: 1993-05-22
Granted: 1995-11-17
Abstract: The processor for replacing previous picture to present one in case of error to reduce the propagation of error includes a decoder(4) storing the code data of an initial circuit(1) to a first FIFO buffer(2) with frame unit and decoding it of a barrel shifter(3) with variable length, a count generator(6) storing the decoded data of the decoder to a second FIFO buffer(5) with frame unit and converting the stored data to real count number, and a shift controller(8) determining the shift quantity of the barrel shifter after accumulating the length of code word provided from the decoder.
Patent KR-970003033-B1 (KR)
Title: Hmm speech recognizing system, characteristic sampling device and method for recognizing, recognizing control method, constructing method of new vocabulary pronunciation dictionary
Inventor: KOO MYUNG-WAN
IPC: G10L15/14
Filed: 1993-08-24
Granted: 1997-03-13
Abstract: A speech recognition system using Hidden Markov Model (HMM) and the controlling method therefor is provided to enhance recognition time by extracting characteristics of parameters of HMM such that the system differentiates the characteristics in the recognition process from that in the extracting process. The speech recognition system comprises a speech dictionary building means(6) for changing the a speech dictionary to a recognizing speech dictionary; an HMM parameter storing means(7) in connected with the speech dictionary building means(6) for storing HMM parameters; a new vocabulary speech dictionary building means(5) in response to the input of a new vocabulary to provide the speech dictionary building means(6) with a speech dictionary for the new vocabulary; a recognizing characteristics extracting means(4) for extracting the characteristics for use in obtaining the HMM parameter relative to the speech input; and an HMM recognizing means(8) for outputting results of the speech recognition based on the characteristics extracted from the extracting means(4) and the speech dictionary in the speech dictionary building means(6).
Patent KR-950007298-B1 (KR)
Title: Production method of information recording medium
Inventor: KIM KWANG-SU
IPC: G11B7/26
Filed: 1993-08-30
Granted: 1995-07-07
Abstract: The manufacturing process makes the mask layer which can improve the writing and reading features by means of removing the feature distortion and the location changes of pit between the record layer and the information record medium plate.
Patent KR-970009608-B1 (KR)
Title: Positive photoresist composition for i ray
Inventor: KIM KI-DAE
IPC: G03F7/00
Filed: 1993-09-03
Granted: 1997-06-14
Abstract: The positive-type resist composition for i-ray begins to synthesize a compound of general formula(II) with a compound of general formula(I) at the equivalent ratio of 1.0-4.0 mole and reaction temperature is maintained to 10-30 deg.C. Here the used alkali catalyst is used from the same mole ratio as a compound of general formula(II) to 5-30wt% excess. And around the reaction, a machine is cooled to inhibit generation of heat when a catalyst is injected. In the general formula(I), R1-R6 are independently hydrogen, halogen atom or hydroxy group respectively and R7 is hydrogen atom or alkyl group of C1-C5. In the formula(II), -SO2group is substituted at C4 or C5 position of the compound.
Patent KR-960013839-B1 (KR)
Title: Prefabricated steel form for beams
Inventor: HA JUNG-HOON
IPC: E04G13/04
Filed: 1993-10-11
Granted: 1996-10-10
Abstract: The prefabricated steel form is used for constructing the ceiling beam structure made of reinforcing steel rods and concrete. The steel form can be reused many times and improve a construction productivity. The steel form comprises: a panel assembly means assembling a steel panel(1) forming a lower and both side panels of the form by an upper guide(2) attached to the bottom of a deck plate(D) and a lower guide(8) installed at a L haped steel(9) supported by a panel support(4); a panel support means supporting the steel panel(1) by the panel support(4) connected to bar supports(6,6') with a height adjustment bar(5') and support steel pipes(3).
Patent KR-970007786-B1 (KR)
Title: Preparation process of silicon field emitter array
Inventor: LEE JONG-DUK
IPC: H01J9/02
Filed: 1993-11-08
Granted: 1997-05-16
Abstract: A manufacturing method of silicon field emitter array comprising  the step making porous state and thermal oxidation state in  appropriate  depth top surface of silicon substrate which mask  patterns are formed ; and the step etching silicon nitride and  silicon oxide to make cold negative tip is disclosed. Thereby, it  is possible to enhance motion stability and productivity and to  reduce costs comparing to LCD because 3,000~5,000 micro vacuum  tubes are integrated in one pixel.
Patent KR-960014383-B1 (KR)
Title: Motor switch control method and switch control device for a car window
Inventor: JUNG SUK-YOUNG
IPC: E05F15/00
Filed: 1993-11-10
Granted: 1996-10-15
Abstract: initializing by clearing an output unit, switching ON-OFF of the output in the switch signals supplied to the first input part as the output logic function, continuing the output when short period switch signal and ratching when long period switch signal, and clearing the ratched output when signal input is transferred to the second input part as a logical function.
Patent KR-970009700-B1 (KR)
Title: Method for controlling line examination in isdn
Inventor: SHIN KYUNG-CHOL
IPC: H04Q1/20
Filed: 1993-12-22
Granted: 1997-06-17
Abstract: There is provided a method of occupying a test bus of a subscriber circuit and line in a full electronic IDSN exchange provided with an ASS(ACCESS SWITCHING SUBSYSTEM), CCS(CENTRAL CONTROL SUBSYSTEM), and INS (INTERCONNECTION NETWORK SUBSYSTEM), comprising: a first step of checking whether it is possible to perform a subscriber test; a second step of, if it is impossible, ending an operation, and if it is possible, checking whether a state of PP(PERIPHERAL PROCESSOR) is normal; a third step of, if the state of PP is not normal, ending the operation, and if the state of PP is normal, performing a test bus occupation routine; a fourth step of ending the operation, after releasing a test equipment and a test bus and returning a state of the subscriber into normal.
Patent KR-0123275-B1 (KR)
Title: Length decoder and zero run length decoder in variable length decoding apparatus
Inventor: LEE JIN-HAK
IPC: H03M7/40
Filed: 1993-12-29
Granted: 1997-11-17
Abstract: A length decoder and zero run length decoder in a variable length decoder is provided to improve an operation speed by decreasing a combination delay using a barrel shifter. The decoder comprises: a barrel shifter(1) for shifting an inputted data and outputting a data of 24 bits; a zero run length decoder(2) for outputting a zero run length value; a down counter(3); an NOR gate(4) for loading an output of the zero run length decoder(2) according to the down counter(3); a flip flop(5) for decreasing a combination delay; a block end detector(7); an OR gate(7) and an AND gate(8); a header length decoder(10) for detecting a length of control signal; and a multiplexer(11) for selectively outputting outputs of the AND gate(9) and the header length decoder(10) according to a selectable signal(S2).
Patent KR-0167582-B1 (KR)
Inventor: LEE JANG-HO
IPC: H03B5/08
Filed: 1993-12-29
Granted: 1999-03-20
Abstract: 본 발명은 마이크로 웨이브 대역의 전압제어 발진기에 관한 것으로서, 특히 공진회로 내의 인덕턴스 값을 핀 다이오드를 부가하여 보다 넓은 대역폭으로 동작할 수 있도록 한 전압제어 발진기(VCO)에 관한 것이다. 
     이를 위하여 궤환회로(4)가 연결된 능동소자(2)와, 부하(5), 정합회로(3) 및 제1인덕터(L1)를 포함하는 공진회로(1)가 상호 접속되어 이루어진 전압 제어 발진기에 있어서, 상기 공진회로(1)의 전단에는 인가되는 전류의 양에 따라 저항값이 가변되는 기능의 핀 다이오드(PD)와, 상기 핀 다이오드(PD)의 동작에 의해 상기 공진회로(1)의 인덕터(L1)에 직렬로 연결되어지는 제3인덕터(L3)를 병렬 연결하여서 된 것이다.
Patent KR-100240531-B1 (KR)
Inventor: GALLUCCI ROBERT RUSSELL
IPC: A61M5/32
Filed: 1992-06-10
Granted: 2000-01-15
Abstract: 본 발명은 선형 폴리에스테르 수지, 이작용성 에폭시화합물 및 촉매를 포함하는 신규한 폴리에스테르 조성물을 개시한다. 상기 신규한 폴리에스테르 조성물은 숙성 후에 탁월한 용융 점도 보유력을 포함한 탁월한 용융 점도 특성을 갖는다.
Patent KR-0184702-B1 (KR)
Inventor: TANAKA YASUO
IPC: B29C44/14
Filed: 1991-08-27
Granted: 1999-05-15
Abstract: 통기성 있는 표포(表布)(10)의 내면(12)에 고무계 또는 합성수지계 등의 고분자 라텍스를 코팅하여 발포경화시킴으로써 형성한, 내부에 비교적 미세한 메카니컬오픈셀(18)를 가지고, 표면가까이에 보다 치밀한 오픈셀의 층(20)과 표면에 통기성 스킨(22)을 가진 라텍스폼박층(15)이 강한 결합영역(17)을 통해 통기성 표포(10)와 결합되어 이루어지는 일체발포제품용의 표피재, 상기 통기성 스킨(22)은 미소공(21)을 가지고는 있지만, 외표면은 실질적으로 평활하여, 이 스킨상에 직접적으로 주입되는 본체폼(25)의 원액을 평활하게 도입할 수 있고, 라텍스폼박층(15)에의 실질적 침입을 잘 방지할 수 있다.
Patent RO-120106-B1 (RO)
Title: Device for increasing the sensibility of thermostatic relays with bimetallic lamella
Inventor: JORA DORU VALENTIN
IPC: H01H61/00
Filed: 2003-04-01
Abstract: The invention relates to a device for increasing the sensibility of thermostatic relays with bimetallic lamella, used for home appliances, ironing machines, for instance. According to the invention, the device consists in connecting an additional wasteful resistance (6) above the bimetallic lamella (3) between the heating resistance (4) and a hub of the thermostatic relay. By means of said hub, the bimetallic lamella (3) of the thermostatic relay is heated more quickly, the thermal operating inertia of the thermostatic relay decreasing. This device enables an important decrease of the on period, between the maximal and the minimal operating temperature of the ironing machine. Thus burning the materials at higher medium temperature and the operating temperature is kept aproximatively constant, the complete cooling of the ironing machine is avoided. The sensibility is increased six times and the on period decreases from 60 C (+/- 30 C) to 10 C (+/-5 C).
Patent RO-127829-B1 (RO)
Title: Process for preparing l-polylactic acid
Inventor: MAJDIK CORNELIA
IPC: C08G65/48
Filed: 2011-03-15
Abstract: The invention relates to a process for the synthesis of highly pure L-polylactic acid. According to the invention, the process comprises the solvent free melt-polycondensation of the L enantiomer of lactic acid at the temperature of 100...130°C, a pressure of 60...80 bar and an irradiation power of 800...1000 W, for 10...30 min, followed by isolating the polylactic acid by dissolving it into dichloromethane and precipitating it with water.
Patent RO-127303-B1 (RO)
Title: Highly-reliable vibration-proof tooth for rotor excavator bucket
Inventor: BARLADEANU MIHAIL
IPC: E02F9/28
Filed: 2011-12-05
Abstract: The invention relates to a highly-reliable vibration-proof tooth for rotor excavator bucket. According to the invention, the tooth is cast from the same material as the entire mass of the body and is defined by an apex having a sharpening angle ( α ) of 40...44°, by the self-wedging zone (c2) of the tooth which is profiled in the shape of a fir-tree, with two rows of three protuberances (1) symmetrically placed against a central crest (2), which is built-up with two layers of hard material up to a third of an active zone (a).
Patent RO-129628-B1 (RO)
Title: Vertical settling tank
Inventor: PETRESCU GABRIEL
IPC: B01D43/00
Filed: 2014-02-10
Abstract: The invention relates to a vertical settling tank mounted within a municipal and/or industrial waste water purification plant. According to the invention, the settling tank comprises a compartment (1) in which a central pipe (1f) is mounted, a system (7) for the supply of a bi-phase air-water mixture and a foam discharge system (4) which comprises a pipe (4c) mounted vertically inside a central pipe (1f) of the supply system (7), the free end of the pipe (4c) being placed at the free water surface, so that only the surface-formed foam is collected, and is continued downwards with an elbow (4b) connected to a horizontal pipe (4a) for foam discharge which passes through the central pipe (1f) and then a ring shell (1a), the system (7) for the supply of the bi-phase air-water mixture consisting of a pipe (7b) supplying the bi-phase air-water mixture fixed to the exterior of the central pipe (1f), at the end of which the supply pipe (7b) is continued with an elbow (7c) continuing, in its turn, inside the central pipe (1f) with a pipe (7d) at the end of which there is a torus with alternating holes (7e) wherethrough the bi-phase mixture enters the compartment (1), the said torus (7e) being positioned under a water supply system (3).
Patent SA-111320400-B1 (SA)
Inventor: CHIU-SAN LEE
Filed: 2011-04-23
Abstract: جهاز تبديل متعدد الوظيفة مقترن بقابس لتصحيح الاستقطاب يتضمن مكون دوار، والذى يكون قابل للدوران ويحتوى على عنصر فحص واحد على الأقل والذى يكون متصل كهربائياً بمقاومة للتحكم باللمس واتصال مباشر بقابس الطاقة. مع مستخدم يستخدم يده ليلمس مقاومة للتحكم باللمس، دائرة مغلقة يتم تكوينها مع جسم الإنسان لتحديد المكان الصحيح لاستقطاب قابس الطاقة. أيضاً، خلال دوران المكون الدوار، يمكن اختيار الاستقطاب الصحيح ومستوى الجهد. أيضاً، يتم توفير مؤشر مقاومة للإشارة إلى الاتصال الصحيح للخط الأرضى.
Patent SA-118400197-B1 (SA)
Title: Cobalt-manganese catalyst system for production of light olefins from synthesis gas
Inventor: Ahmed Suliman AL-ZENAIDI
Filed: 2018-11-14
Abstract: Methods of preparing catalysts for converting synthesis gas to C2 to C4 olefins and processes of using the catalysts are disclosed. The catalysts are made using a support material, cobalt salt, iron salt, and manganese salt. Urea solution is used as the precipitating agent to precipitate the catalysts in a gel form. The gel is subsequently dried and calcined to form active catalysts. The active catalysts contain 5 to 25 wt.% of cobalt-manganese supported on silica. A method of using the catalysts for converting synthesis gas to C2 to C4 olefins include contacting a synthesis gas with the catalysts under reaction conditions to produce a product stream containing C2 to C4 olefins. Overall, the catalysts exhibit stability for more than 400 hours under the reaction conditions for converting synthesis gas.
Patent SA-121420470-B1 (SA)
Title: Fiber Elements for Soil Stabilization
Inventor: HUSAIN ABBAS
Filed: 2021-02-16
Abstract: The fiber elements for soil stabilization include a combination of rigid and flexible fibers that are adapted to be added to soil in order to stabilize the soil to improve the geotechnical characteristics thereof. Each fiber element includes a rigid fiber having opposed first and second ends, at least the first end defining a first ring. A plurality of flexible fibers are attached to the first ring. When mixed with soil, the rigid fibers provide stiffness to the soil mass, and the flexible fibers provide deformability. For purposes of packaging, prior to addition to soil, the plurality of flexible fibers may be at least partially secured to one another by a water soluble material, such as a water soluble glue, water soluble thread or the like. A plurality of the fiber elements may be secured to one another by the water soluble material, forming a fiber module. FIG. 3