baber/WOPTO huggingface dataset:
Patent KR-940009250-B1 (KR)
Title: Refresh timer for plural operating voltage
Inventor: KIM MYONG-JAE
IPC: G11C11/406
Filed: 1991-12-18
Granted: 1994-10-01
Abstract: The refresh timer providing the constant cycle refresh signal even though the input operating voltage is changed comprises a multiple start-up circuit (100A) connected to the power terminal; a control circuit (200A) receiving the output of the start-up circuit (100A) to produce different signals for each operating voltage; a ring oscillator (300A) generating different frequency signal according to each output signal of the control circuit (200A); a counter stage (400A) amplifying the output signal of the ring oscillator (300A) to produce the refresh cycle time signal. Only one of the ring oscillators (300A) is selected for each operating voltage to generate the constant frequency refresh signals.
Patent KR-950003361-B1 (KR)
Title: Device for handling workpiece automatically
Inventor: KIM BYONG-SU
IPC: B23Q7/00
Filed: 1992-02-17
Granted: 1995-04-12
Abstract: The automatic machining system for automatically loading a lot of materials on the work stocker, transferring the materials from the stocker to the machining device and inputting the machined parts to a chute by a robot, performe the unmanned machining of the parts such as a drum, disc, on hub. The system comprises the robot (1) having a mechanical hand (1); the gripper (3) having a jaw (5) mounted at an air chuck (2), provided at an end bracket (3) of the robot; high-speed jaw exchanger having a chuck (6) and lock-pin separating device (7); a work stocker (12) for loading the machining material (10); material machining devices (13,28,29,30) arranged radiately; rotary worktables (14),(15) for overturning the material (10); the chute (20) for ouputting the material (10).
Patent KR-960001482-B1 (KR)
Inventor: JURI TATSURO
IPC: H04N19/89
Filed: 1992-02-26
Granted: 1996-01-31
Abstract: 내용 없음.
Patent KR-960000347-B1 (KR)
Inventor: TAKITA HIDENORI
IPC: H04N9/28
Filed: 1992-04-10
Granted: 1996-01-05
Abstract: 내용 없음.
Patent KR-940008994-B1 (KR)
Inventor: IRIE YOSHIO
IPC: C08J3/12
Filed: 1992-04-10
Granted: 1994-09-28
Abstract: 내용 없음.
Patent KR-960001650-B1 (KR)
Title: Vertical extension method of font in printer
Inventor: JUNG SUNG-HWA
IPC: G06K15/00
Filed: 1992-04-24
Granted: 1996-02-03
Abstract: confirming a mode for extending a font; designating a frame count value of the total font column values; storing the data to be stored in the first and second areas; storing a bottom value of the font in the first area; extending a predetermined bit by designating a predetermined parameter for a double main process; storing the upper value of the font in the second area; extending a predetermined bit by designating a predetermined parameter for a double main process; adding "1" to the values of the first and second buffers; and performing the above operations until the initial designation value disappears by reducing the frame count value by 1.
Patent KR-950003798-B1 (KR)
Title: Cash register having own number and data maintaining function
Inventor: LEE HYO-YUN
IPC: G07G1/12
Filed: 1992-07-16
Granted: 1995-04-18
Abstract: A cash register is disclosed including the functions of storing the code value concerning the inherent number of the cash register into the first region of the non-volatile memories, and storing the address data of the RAM into the second region of the memories.
Patent KR-100268138-B1 (KR)
Inventor: HIROAKI MATSUMOTO
IPC: H04N9/64
Filed: 1992-08-24
Granted: 2000-10-16
Abstract: [목적] 본원은 장치 본체만으로 각종 신호 처리의 조정을 행할 수 있도록 한 자기 조정 기능을 갖는 영상 신호 처리 장치를 제공한다. 
     [구성] D/A 변환기(28, 40)에 입력되는 휘도 데이타 및 색도 데이타를 지정의 타이밍에서 레지스터(29, 43)를 거쳐 시스템 제어기(11)에 취입하여 각종 처리 파라메터를 형성하고, 휘도 신호 생성부(26)에 있어서 색 온도 보정이나 화이트 밸런스 조정 회로(37)에 의한 화이트 밸런스 조정, 선형 매트릭스 회로(23)에 의한 색상 조정등의 각종 신호 처리를 상기 각종 처리 파라메터에 따라서 입력 영상 신호로 실시하고, 상기 D/A 변환기(28, 40)에서 각종 신호 처리된 영상 신호를 출력한다.
Patent KR-100229951-B1 (KR)
Title: Process for the drying and granulation of aspartame
Inventor: SLANGEN HUBERTUS JOZEF MARIA
IPC: A23L27/30
Filed: 1992-09-02
Granted: 1999-11-15
Abstract: The invention relates to a process for the drying and granulation of aspartame through the thermal treatment of a wet mass of aspartame crystals using a hot carrier gas, characterised in that a wet mass of aspartame crystals is supplied, in a continuous process, to a high-speed paddle dryer fitted with a jacket heated to a temperature of 80-190 DEG C and with paddles, mounted on a central shaft with a controllable speed of rotation, at an adjustable distance from and angle to the jacket, which are positioned so that the required particle size of the granules is realized, the speed of rotation being chosen so that the Froude number is higher than 1, and the supplied product is treated in the paddle dryer for 15-600 seconds, with the simultaneous presence of a carrier gas having an inlet temperature of 100-200 DEG C, and the granular product obtained is discharged from the paddle dryer and, if necessary, dried further - in a manner known per se - in one or more drying steps in other drying equipment. With the use of high-speed paddle dryer aspartame with good microbiological properties is very easily obtained. <IMAGE>
Patent KR-100259686-B1 (KR)
Inventor: KUO ELIZABETH ANNE
IPC: C07C/
Filed: 1992-09-16
Granted: 2000-06-15
Abstract: 본 발명은 신규의 3-시클로알킬-프로프-2-엔아미드 유도체, 그의 호변 이성질체 및 그의 염, 그의 제조 방법, 그를 함유하는 제약 조성물 및 의약으로서의 그의 용도에 관한 것이다.
Patent KR-960009855-B1 (KR)
Inventor: TAKENAKA KENJI
IPC: F04B27/10
Filed: 1992-10-22
Granted: 1996-07-24
Abstract: 요약없음
Patent KR-950004763-B1 (KR)
Inventor: MAGARA TAKUJI
IPC: B01D67/00
Filed: 1992-11-16
Granted: 1995-05-10
Abstract: 내용 없음.
Patent KR-950012836-B1 (KR)
Title: The filter circuit with operational transconductance amplifier
Inventor: PARK HYON-CHOL
IPC: H04N9/64
Filed: 1992-11-23
Granted: 1995-10-21
Abstract: a preamplifier for amplifying a luminance signal and a chrominance signal from a tape; a chrominance signal separating lowpass filter connected to an output terminal of the preamplifier, for separating the chrominance signal from the output signals; an automatic gain control amplifier connected to the output terminal of the preamplifier, for controlling the output signals from the preamplifier, to thereby maintain the output signals in a constant level; an equalizer connected to an output terminal of the auto gain control amplifier, for trapping the chrominance signal and picking a specific frequency; a signal processing unit connected to output terminals of the chrominance signal separating lowpass filter and the equalizer, for processing the chrominance signal and the luminance signal outputted from the chrominance signal separating lowpass filter and the equalizer; and a luminance signal separating bandpass filter for removing a bandpass occupied excepting for the luminance signal between the preamplifier and the automatic gain control amplifier.
Patent KR-0138349-B1 (KR)
Inventor: KWON SOO-HYUK
IPC: H04N5/445
Filed: 1993-02-26
Granted: 1998-05-15
Abstract: 이 발명은 특정 부분의 화면 제거 장치 및 제어 방법에 관한 것으로서, 전체의 화면 중 어떤 특정한 일부분만 제거할 수 있는 장치가 없어서 녹화 재생시 불필요한 부분을 제거하지 못했으므로, 이를 해결하기 위한 이 발명은 화면을 64영역으로 분할하여 제거할 영역을 수직 및 수평 엎다운 회로를 사용하여 영역을 설정하는 단계를 수행하고, 설정된 영역을 메모리한 후 그 영역을 임의의 칼라로 디스플레이하는 단계를 수행함으로써 화면에서 제거하고자 하는 특정 부분의 화면을 제거한다. 따라서 화면을 녹화 재생할 수 있는 모든 장치에 적용할 수 있다.
Patent KR-0178782-B1 (KR)
Inventor: SHU IN-YOUNG
IPC: H02M1/36
Filed: 1993-05-26
Granted: 1999-05-15
Abstract: 이 발명은 파워 써플라이의 출력전압 손실 방지회로에 관한 것으로서, 평활용 콘덴서에 충전된 전압이 방전 완료되는 시간을 결정하기 위해 구성한 방전용 저항으로 인하여 발생하는 출력전압의 손실을 방지하기 위하여 입력전압이 인가되는 경우에는 방전용 저항의 동작을 차단하고 입력전압이 인가되지 않는 경우에는 방전용 저항이 동작되도록 스위칭하는 스위칭용 모스 트랜지스터와, 상기 스위칭용 모스 트랜지스터의동작을 제어하는 제어용 모스 트랜지스터와, 상기 제어용 모스 트랜지스터를 동작시키기 위한 일정 전압을 공급하는 트랜스포머를 구성하였다. 따라서 이 발명에 따른 파워 써플라이의 출력전압 손실 방지회로에 의하면, 입력전압이 인가되는 경우 방전용 저항의 저항값으로 인한 출력전압의 손실을 방지할 수 있으므로, 출력 효율을 향상시킬 수 있는 이점이 있다.
Patent KR-100260564-B1 (KR)
Title: Railcar vehicle with stainress
Inventor: TIEBERGHIEN PHILIPPE
IPC: B61D17/04
Filed: 1993-06-02
Granted: 2000-07-01
Abstract: The invention relates to a stainless-steel body for a rail vehicle, characterised in that:   - the chassis side members (2) and the roof wings (3) are made of stainless steel, consist of profiles continuous over the entire length of the body and are visible, - the cladding of the lateral faces comprises smooth stainless-steel plates (6, 7, 8, 9) of small thickness in relation to the thickness of the said profiles, the plates being fastened by continuous sealing welding to the edges of the side members (2) and of the roof wings (3), in such a way that the surface of these plates is as small as possible.   Both the elements of the resistant structure and the plates on this resistant structure are assembled by means of welding beads. <IMAGE>
Patent KR-960011090-B1 (KR)
Title: Thermosetting modifiers, process thereof and cable-insulating resin composition including them
Inventor: KANG MYUNG-EUI
IPC: C08G81/00
Filed: 1993-06-16
Granted: 1996-08-20
Abstract: The composition comprises 3-30wt.% synthetic rubber having reactive groups at both ends, or their mixture, 40-90wt.% epoxy compound having more than one epoxy group at both ends, or their mixture, 3-30wt.% polyfunctional caprolacton polyol or their mixture, 0.1-2.0wt.%reaction accelerator such as amine- terminated triflic acid and amine-terminated boron trifluoride.
Patent KR-100269984-B1 (KR)
Title: Novel phospholipase a1, process for its preparation and the use thereof
Inventor: HATORI ATSUSHI
IPC: C12P9/00
Filed: 1993-06-16
Granted: 2000-10-16
Abstract: PURPOSE: Provided are an enzyme capable of hydrolyzing the 1-acyl group of a phospholipid, that is a phospholipase A1, as well as a process for the production and the use of such an enzyme. CONSTITUTION: A method of preparing a lysophospholipid from a phospholipid substrate which has a 1-acyl group comprises contacting the phospholipid substrate with a Phospholipase A1 obtainable from a species of the fungus Aspergillus to hydrolyze the phospholipid substrate, thereby removing the 1-acyl group, in which the Phospholipase A1 has a pI under isoelectric point electrophoresis at about pH 2.8 to about pH 4.5 and a molecular weight of 30000-40000dalton; hydrolyzes phospholipid at pH 2.5-6.0; and shows stability at 45-90 deg.C and pH 3.2 to 5.5.
Patent KR-0128859-B1 (KR)
Title: Adaptive image coding controller
Inventor: KIM JONG-HOON
IPC: H04N19/00
Filed: 1993-08-20
Granted: 1998-04-10
Abstract: Adaptive video coding controller adaptively performs a coding in consideration of a covered area and uncovered area of a video signal. The adaptive video coding controller includes: a means(12) for determining an uncovered area of an input video signal; means(14) for determining a macro block format corresponding to an output result of the uncovered area determining means(12) according to a timing signal from the video signal; and means for generating a switching control signal corresponding to a mode switch according to an output signal from the macro block format determining means(14).
Patent KR-950010279-B1 (KR)
Title: Hi-speed starting control apparatus for ldp system
Inventor: CHO BON-KU
IPC: G11B19/24
Filed: 1993-08-23
Granted: 1995-09-12
Abstract: The high speed starting control device comprises a gain control unit for outputting an optimal compensation gain and a maximum power amplification gain; a logic circuit for outputting a switching signal; a first switching device switched by the switching signal of the logic circuit to apply the optimal compensation gain to a compensator; and a second switching device switched by the switching signal of the logic circuit to apply the maximum power amplification gain to a power amplifier.
Patent KR-970006708-B1 (KR)
Title: Process for producing conductive nylon 6/polyaniline composites
Inventor: AHN TAE-HWAN
IPC: C08J7/12
Filed: 1993-08-25
Granted: 1997-04-29
Abstract: The method of preparing conductive nylon 6/polyaniline composite is employed for a rechargeable battery, an electrode and an element of electric liquid crystal screen. The composite is easily produced because of simple processing control and is improved a mechanical strength and electric stability. An inorganic oxidation agent which is not decomposed by formic acid(a solvent for nylon 6 resin) and hot melt, is dispersed and penetrated into the matrix 6 resin. And then nylon 6 resin prepared in this manner, is hanged in vacuum and uniformly exposed to aniline vapor and hydrochloride acid vapor simultaneously. Consequently, the fine particle of aniline vapor is reacted with inorganic oxidation agent located in the matrix of nylon 6 resin and a equivalent aniline is oxidation and polymerized. Therefore polyaniline is formed in the matrix of nylon 6 resin.
Patent KR-100269166-B1 (KR)
Title: Bias magnet loader of an optical magnetic disc drive
Inventor: CHOI YOUNG SOO
IPC: G11B7/00
Filed: 1993-08-31
Granted: 2000-10-16
Abstract: PURPOSE: A loading device for a bias magnet is provided to reduce noise caused by an operation of the bias magnet, and to simplify manufacturing and assembling processes through simplifying a structure of the loading device. CONSTITUTION: In case of a holder(21) not storing a disk cartridge(26), a bias magnet(23) is maintained an unload state by repulsive force of springs(30,30'). Herein, the bias magnet is not excessively rotated but maintained in the unload state by hanging sills(28). By inserting the disk cartridge to the holder, a front end of the cartridge presses and rotates vertical portions of levers(24,24'). Then, the bias magnet is loaded toward a disk through a through hole(29).
Patent KR-960003079-B1 (KR)
Title: Apparatus for selecting garlics
Inventor: PARK NOH-HYUN
IPC: A23N4/22
Filed: 1993-10-20
Granted: 1996-03-04
Abstract: The machine for dividing the whole garlic body into small pieces by using the rubber roller without giving the damage to the garlic body, comprises a body for supporting the respective components; garlic supply means mounted on the body; a plurality of dividing means for rotating and separating the garlic body from the supply means; driving means for driving the dividing means; speed-changing means for controlling the rotating speed and direction of the dividing means, mounted between the driving means and dividing means; power supply device for supplying the power to the dividing means.
Patent KR-960010449-B1 (KR)
Title: Packing film
Inventor: SIM JAE-HYUN
IPC: B32B27/06
Filed: 1993-10-27
Granted: 1996-08-01
Abstract: The packing film is made by attaching the film composed of one or more polymers, selected from polyprophylene, polyethylene, ethylene-vinylacetate copolymer, a polymer of graft-polymerizing maleic anhydride and polyprophylene, a polymer of graft-polymerizing maleic anhydride and polyethylene, ethylene-acetic acid, ethylene-ethylacrylate copolymer, ethylene-methylacrylate copolymer and suryln, and one or more polymers selected from polyisobutylene, hydrogenated polyterpen, hydrogen carbon resin, terpen-oil copolymer and phenol copolymer to one side of a fase film selected from polyprophylene or polyethylene.
Patent KR-100278246-B1 (KR)
Title: 탄화수소의탈황방법
IPC: B01J23/887
Filed: 1993-11-27
Granted: 2001-03-02
Abstract: 불포화 탄화수소 또는 불포화 탄화수소를 함유하는 탄화수소의 탈황법이 기재되어 있다. 
     본 발명의 탈황법은 공침법에 따라 조제된 구리-아연계 탈황제를 사용하여 수소의 존재하 또는 비존재하에 불포화 탄화수소 또는 불포화 탄화수소를 함유하는 탄화수소를 탈황시키는 것으로 이루어진다. 
     본 발명의 방법에 따르면, 불포화 탄화수소의 수소화를 억제하면서 동시에 탄화수소 원료 속의 유황 함유량을 감소시킬 수 있다.
Patent KR-960006322-B1 (KR)
Inventor: WATANABE YOSHINORI
IPC: C21B5/00
Filed: 1993-11-30
Granted: 1996-05-13
Abstract: 내용 없음.
Patent KR-960008212-B1 (KR)
Title: Control device for wind velocity and temperature in a fire alarm
Inventor: CHOE KWON-HEE
IPC: G08B17/10
Filed: 1993-12-15
Granted: 1996-06-20
Abstract: The device controls definitely the wind velocity and the temperature on a non-operation or operation testing of the fire detector so that it can minimize the energy loss. The device comprises: PI controllers(20,28) controlling the temperature and the wind velocity; triangle wave generation circuits(22,30) generating a comparison reference value; comparators(21,29) comparing the outputs from the PI controllers(20,28) with the reference value; a relay(24) switching according to the output from the comparators(21,29); an output circuit(25) getting on or off a heater(36) according to the switching of the relay(24); another output circuit(32) driving a fan(34) of a motor(33) according to the output of the comparator(29); a tester(35) having a sensor(38) sensing the temp. and the wind velocity.
Patent KR-960013715-B1 (KR)
Title: Controlling device for automatic tool changer and b-axis indexer simultaneously
Inventor: AHN MOON-HYUN
IPC: B23Q15/00
Filed: 1993-12-28
Granted: 1996-10-10
Abstract: The device is designed to control an automatic tool changer and a B-axis indexer synchronously. The device includes : a NC CPU section (1); a fabrication program section (2); a programmable machine control section (3); a machine input/output section (4); a machine control panel (5); an automatic tool changer (6); and a B-axis index servo motor (8).
Patent KR-100250683-B1 (KR)
Title: Method of fabricating capacitor in the semiconductor memory device
Inventor: LIM CHAN
IPC: H01L27/02
Filed: 1993-12-29
Granted: 2000-04-01
Abstract: PURPOSE: A method for manufacturing a capacitor of a semiconductor memory device is provided to increase an available surface area of a charge storage electrode by forming a maze type charge storage electrode. CONSTITUTION: The first conductive layer(30) for charge storage electrode is formed on a substrate. A doped oxide layer(22,222,2222) and an undoped oxide layer(11,111,1111,11111) are laminated on the first conductive layer(30). A hemispherical polysilicon layer(17) is formed on the oxide layer(11111). A multitude of pillar is formed by etching selectively the doped oxide layer(22,222,2222) and the undoped oxide layer(11,111,1111,11111). Unevenness is formed at a sidewall of the pillar by etching the doped oxide layer(2222,222,22). The second conductive layer(300) is formed to bury the unevenness of the pillar. The pillar is exposed by an etching process. The doped oxide layer(22,222,2222) and the undoped oxide layer(11,111,1111,11111) are etched. The third conductive layer(3000) is formed on the whole face of the structure.
Patent KR-970006268-B1 (KR)
Title: Fabrication method of mosfet
Inventor: PARK SANG-HOON
IPC: H01L21/336
Filed: 1993-12-31
Granted: 1997-04-25
Abstract: A method of fabricating a MOSFET includes the steps of forming a P well in a silicon substrate, depositing an oxide layer and nitride layer and patterning them to leave them only on an active region but remove them formed on a predetermined region of the active region, on which a gate electrode will be formed and implanting P+ impurities into the substrate to form a channel stopper, forming a field oxide layer and temporary field oxide layer on a nonactive region and active region, respectively, removing the nitride layer and oxide layer, forming a photoresist pattern on the temporary field oxide layer and forming an N+ ion implanted region in the silicon substrate, removing the photoresist pattern, depositing a polysilicon layer on the substrate, forming a photoresist pattern on a region other than the temporary field oxide layer, removing the polysilicon layer and temporary field oxide layer to form a trench, removing the photoresist pattern, forming a gate electrode in the trench and forming a gate oxide layer and gate electrode, depositing a PSG layer on the overall surface of the substrate and diffusing doped N- ions into the silicon substrate surrounding the gate electrode through high-temperature heat treatment to form an N- region, etching the PSG layer to exose the polysilicon layer, leaving PSG remnants on the sides of the gate electrode, forming a silicide layer on the polysilicon layer ad gate electrode, forming an interlevel insulating layer on the substrate, removing a predetermined portion of the interlevel insulating layer to form a contact hole exposing the silicide layer and forming a metal line, to thereby restrict spikes when the metal line comes into contact with a lower conductive layer.
Patent KR-100243956-B1 (KR)
Title: Composition comprising a tramadol material and actaminophen for the treatment of pain
Inventor: RAFFA ROBERT B
IPC: A61P29/00
Filed: 1992-09-03
Granted: 2000-03-02
Abstract: This invention relates to a composition comprising a tramadol material and acetaminophen, and its use. As used herein tramadol refers to various forms of tramadol. The compositions are pharmacologically useful in treating pain and tussive conditions. The compositions are also subject to less opioid side-effects such as abuse liability, tolerance, constipation and respiratory depression. Furthermore, where the components of the compositions are within certain ratios the pharmacological effects of the compositions are superadditive (synergistic).
Patent RO-121304-B1 (RO)
Title: Method and system for encoding message signals to be transmitted within a communication system
Inventor: SHANBHAG ABHIJIT G
IPC: H04J13/12
Filed: 1999-08-17
Abstract: The invention relates to a method and a system for encoding message signals to be transmitted within a communications system using orthogonal code vectors (10) for transmitting message signals. The claimed method includes a stage of forming a first vector matrix using a first series of cyclic shifts and a stage of forming a second vector matrix using a second series of cyclic shifts. The first vector matrix is permuted to provide an orthogonal code, permuting operations being determined therefor. The method also provides the application of said permuting operations to the second matrix, to obtain a quasi orthogonal code vector (50). The quasi orthogonal code vector (50) is applied to a message signal to obtain an encoded message signal which is transmitted. The forming of the first vector matrix includes a substage of applying cyclic shifts to a sequence having a characteristic polynomial. According to the invention, the system for encoding message signals comprises the suitable means for carrying out each stage of the claimed method, namely means for forming a first vector matrix, means for forming a second vector matrix, means for permuting the first vector matrix, means for determining the permuting operations, means for applying the permuting operations and means for applying a quasi orthogonal code vector.
Patent RO-118113-B1 (RO)
Title: Composition for protecting the skin against hydrophobe impurities
Inventor: ŢIGĂU VALENTINA
Filed: 2001-03-30
Abstract: The invention relates to a composition for the protection of the skin against hydrophobe impurities, said composition comprising : 50...90% water, 5...20% anionic surfactant selected from sulphated alkyl-ether, alkyl or sulphonated alkyl-aryl derivatives, acyl aminoacids/ salts thereof, 2...15% hydrating agent, selected from propylene glycol, glycerin and sorbitol, 0.5....15% a non-ionic surfactant which, according to the nature of the bond uniting the polar area with the non-polar area, may be with ester-type bond, with ether-type bond or with amidic bond, 0.1...10% amphoteric surfactant selected from acyl/dialkyl ethylene diamine and N-alkylated aminoacids, 0.05...8%, complexing agent of the sodium salts of the ethylene diamine tetraacetic acid and/ or citric acid, 0.1...5% lipo-regulator agents consisting of a complex of vitamins A and E, 0.01...4% antimicrobian curing agent selected from solubilized methyl dibromo glutaronitrile in phenoxy ethanol, triclosan, imidazolidinyl urea, diazolidinyl urea, Aloe Vera, up to 3% colouring agent and /or perfuming agent, the percentage being expressed by weight.
Patent RO-121809-B1 (RO)
Title: Process for preparing zinc orthophosphate tetrahydrate
Inventor: STOICA IONEL AUGUSTIN
IPC: C01B25/37
Filed: 2003-03-20
Abstract: The invention relates to a process for preparing zinc orthophosphate tetrahydrate from the zinc ashes resulting as residue in copper metallurgy, by treating the same with concentrated sulphuric acid. The Cu2+ ions are removed from the resulting solution by the treatment with zinc powder. The zinc phosphate is precipitated from the filtered solution by admixing a solution of trisodic phosphate, in a concentration of 14%.