baber/WOPTO huggingface dataset:
Patent KR-820001790-B1 (KR)
Title: Self-cooling resonance torsional vibration damper
Inventor: BAUER F
IPC: F16F15/10
Filed: 1978-12-13
Granted: 1982-10-02
Abstract: The resonance torsional multi part vibration damper(3) includes a primary section(4a,4b) with one or more fixedly inter-connected parts arranged on a shaft(1) or crankshaft.  It also includes one or more secondaary section(7,8) adjacent to each other but spaced from each other& by elaatic plates connected to the parimary section.  In the primary sectoin, there are cooling air openings(11)  which lead outwardly and into the region of the secondary sections.  At the free end face or end faces(6) of one or more secondary sections are radially outwardly leading cooling fins.
Patent KR-820000867-B1 (KR)
Title: Process for preparing substituted carboxylic acid amides
Inventor: FORSTER H
IPC: C07D277/68
Filed: 1979-05-01
Granted: 1982-05-17
Abstract: Title compds. ≮I; R = H, halo, (halo) alkyl, (halo) alkoxy, (halo) alkylthio, (di) (alkyl) amino, NO2, cyano, alkoxycarbonyl; n = 1, 2, 4 or 4; R1 = H or alkyl; R2, R3 = H, (un) substituted aliph., cycloalkyl, aryl, (un) substituted mono- or bicyclyl; X = O or S; Hal = C1, F, Br, I≉useful as herbicides (no data), were prepd. by reaction of II and III. Thus, O-acetylation of HOCH2CO2H with AcC1 gave 70% AcOCH2COC1, which N-acylated PhNHMe in PhMe to give 74% AcOCH2CONMePh. Sapon, of AcOCH2CONMePh with NaOH in MeOH gave 86% HOCH2CONMePh, which reacted with 2-chlorobenzothiazole in the presence of KOH to give 84% II.
Patent KR-830002676-B1 (KR)
Title: Insecticidal and miticidal composition
Inventor: UTAGAYA TAKADOSI
IPC: A01N25/22
Filed: 1980-02-29
Granted: 1983-12-07
Abstract: Insecticidal and mitecidal agents consisting of 2-dimethylamino-5,6-dimethylpyrimidin-4-yl-dimethyl carbamate. one or more organic phosphoric compds, methylcarbamate compds, pyrethroid compds., and an inactive carrier were prepd.  Thus, 2 parts of pyridapenone, 2 parts of 2-dimethylamino-5,6-dimethylpyrimidin-4-yl-dimethylcarbamate, and 96 parts of talc were mixed and pulverized to give powd. insecticidal agent.
Patent KR-840000278-B1 (KR)
Title: Preparation of l,l,l,-trifluoro-o-toluicfluoride
Inventor: KODAIRA TSUMORU
IPC: C07C63/70
Filed: 1980-03-08
Granted: 1984-03-13
Abstract: Title compd.(I) was prepd. by reaction of a mixt. contg. III and IV with HF. Thus, 43g o-toluic chloride was treated with Cl gas at 110˜120≰C to give a mixt. contg. 1,1,3,3-tetra chloro-1,3-dihydroisobenzofuran 6 parts and α,α,α-trichloro-o-toluic chloride 4 parts, 7.6g of which was reacted with 8.5g HF at 110˜125≰C for  4 hr to give 4.5g I (b.p.=160-162≰C, yield=80%).
Patent KR-830002168-B1 (KR)
Title: 송신 또는 녹음 및 송수신의 자동제어방식
IPC: H04B1/40
Filed: 1980-03-28
Granted: 1983-10-17
Abstract: 내용 없음.
Patent KR-830002414-B1 (KR)
Title: 주사전자 현미경용 영상신호 처리장치
IPC: H01J37/22
Filed: 1980-07-09
Granted: 1983-10-26
Abstract: 내용 없음.
Patent KR-840000747-B1 (KR)
Title: Process for preparing 6-fluoro-9-chloro-predmsolone 17,21-diesters
Inventor: STEIMLE PETER
IPC: C07J/
Filed: 1980-11-14
Granted: 1984-05-31
Abstract: Antiinflammatory chlorofluoropregnadienediones I (R1, R2=C1-C6 alkyl, aryl; Z=H, Me)were prepd.  Thus, 20g 9β,11β-epoxy-16β-methyl-pregna-1,4-diene-17,21-diol-3,20-dione-17,21-dipropionate was refluxed with 2g p-toluene sulfonate and 200mL isoprophenylacetate for 2hrs. and treated with 10g F.C1O3 at 0≰C for 16hrs. to give 22g 6 -fluoro-9β,11β-epoxy-16β-methyl-pregna -1,4-diene-17,21-dione-17,21-dipropionate.
Patent KR-830000631-B1 (KR)
Title: 자동 미곡 세척 및 석발기
IPC: B08B3/04
Filed: 1981-06-27
Granted: 1983-03-23
Abstract: 내용 없음.
Patent KR-870000129-B1 (KR)
Title: Holding device for nested pipes
Inventor: KANASAWA TASSUO
IPC: B65D59/00
Filed: 1982-06-26
Granted: 1987-02-12
Abstract: The support is for holding nested pipes and comprises an abutment to bear against the socket ends of all the pipes, and radial-axial retainers removably mountable on the abutment and having a projection engageable in an annular groove of the diametrically larger of two adjacent pipes. Steps on the abutment are engageable with an annular shoulder of the diametrically smaller of the two pipes. The support holds th pipes even when the two adjacent pipes differ greatly in diameter.
Patent KR-890000979-B1 (KR)
Title: Synchronizing circuit arrangement for a television receiver
Inventor: JOZEF NILLESEN ANTONIUS H H
IPC: H04N5/08
Filed: 1982-07-20
Granted: 1989-04-15
Abstract: The input video signal is applied to a synchronisingseparating stage which drives line-and field-synchronising pulses. An oscillator generates a sampling signal of frequency four times the color subcarrier frequency.  This is applied to a phase detector to provide an oscillator control voltage.  The counter counts up the number of clock pulses from an enabling pulse to the line syncronising signal edge, and counts down the pulses from the edge to the termination of the enabling pulse.
Patent KR-910001374-B1 (KR)
Inventor: KNIGHT STANLEY P
IPC: H04N5/50
Filed: 1982-09-16
Granted: 1991-03-04
Abstract: 내용 없음.
Patent KR-830000129-B1 (KR)
Title: Process for preparing mercaptoimidazole derivatives
Inventor: FERRINI PIER GIORGIO
IPC: C07D401/04
Filed: 1982-11-10
Granted: 1983-02-14
Abstract: 2-Mercaptoimidazoles I(R1,R2 = heteroaryl, aryl; R3 = H, lower alkyl; R4 = C2 lower alkyl; n = 0, 1, 2), useful as antiinflammatory, anodyne and/or cerebral thrombosis-treating agent, were prepd. by reacting compds. II with epoxy-lower alkane or lower alkene. Thus, 0.8 g Na was dissolved in 200ml EtOH and 8 g 2-mercapto-4(5)-phenyl-5(4)-(3-pyridyl)-imidazole added and refluxed, in which EtOH 30ml contg. ethylene oxide 0.84 g was added and refluxed for 16 hr to give 2-(2-hydroxyethylthio)-5(4)-phenyl-4(5)-(3-pyridyl)-imidazole(m.p.128-130≰C).
Patent KR-910006550-B1 (KR)
Title: Method and apparatus for feeding and continuously casting molten metal with inert gas applied to the mouing mold surfaces and to the entering metal
Inventor: HAZELETT ROBERT W
IPC: B22D11/06
Filed: 1983-04-28
Granted: 1991-08-28
Abstract: Methods and apparatus for feeding and continuously casting molten metal (1) are described in which inert gas is applied to the moving mold surfaces and to the entering metal for the protection or shrouding of the molten metal surface within the mold cavity from oxygen and other detrimental atmospheric gases. The shrouding is by means of inert gas injected into the mold through a semi-sealing nosepiece (7), or directed at the mold cavity and passing through the necessary slight gaps around the nosepiece. At the same time, such inert gas is further circulated by channeling or shielding the circulated gas for blanketing and diffusing of the inert gas along the moving mold surfaces (9, 10) for cleansing them of undesired accompanying gases, such as atmospheric oxygen, water vapor, sulphur dioxide, carbonic acid gas, etc. as the mold surfaces approach the nosepiece before entering the mold region. In installations where the inert gas is directed at the mold cavity from above and/or below the nosepiece, the gas is ejected at a relatively slow flow rate so as to be noiselessly ejected, i.e. without audible disturbance, the objective being to avoid entrainment of air. Heavier-than-air inert gas may advantageously be used above the nosepiece, while lighter-than-air inert gas is simultaneously used below it.
Patent KR-910004196-B1 (KR)
Inventor: BARKATT AARON
IPC: G21F9/12
Filed: 1983-08-16
Granted: 1991-06-24
Abstract: 내용 없음.
Patent KR-900004091-B1 (KR)
Title: Process for prepararing liquid formulations of dihydropyridines
Inventor: HOFF DIETER
IPC: A61K31/44
Filed: 1984-03-03
Granted: 1990-06-15
Abstract: A liquid formulation comprises 0.5-10 wt.% dihydropyridine of formula (I), 30-50 wt.% solubilizing agent and 70-50 wt.% diluent. In (I), R1 is C1-4 alkyl; R2 is C1-10 alkyl; R3 is C1-4 alkyl, cyano or hydroxy methyl; X is 2-nitro, 3-nitro, 2-chloro or 2,3dichloro. The formulation is prepd. by dissolving (I) in the solubilizing agent at 30-70≰C, and adding the diluent.
Patent KR-900005015-B1 (KR)
Title: 1-pyrimidinyloxy-3-hetaryl-alkylamino-2-propanols and the preparing process thereof
Inventor: LAWSON JOHN E
IPC: C07D239/47
Filed: 1984-05-04
Granted: 1990-07-16
Abstract: 1-(4-pyrimidinyloxy)-3-(hetarylalkylamino)-2-propanols of formula (I) are prepd. by coupling an X substd. pyrimidine with a suitable W- substd. propanol or incipient propanol intermediate, followed by hydrolysis and/or aminolysis with the substd. amino component of (I). X is H or halo, W is halo. In the formula, R1 is C1-6 alkyl, NH2, acylamino, cyano, halogen or H; R2 is NH2, acylamino, halogen, hydrazino, H or phenyl; alk is C1-6 alkylene; Z is H, phenyl, indolyl, thienyl, benzothienyl, benzofurnyl or benzimidazolyl. (I) are useful as an anti-hypertentive agents.
Patent KR-840001134-B1 (KR)
Title: Process for preparing substituted -oxo- -phenyl-carbanoyl-pyprolpropionitriles
Inventor: WALKER GORDON NOTHROP
IPC: C07D207/416
Filed: 1984-05-29
Granted: 1984-08-09
Abstract: Title compds. (I; P1=2- or 3-pyrrolyl; R=H, lower alkyl; Ph=phenyl), or the alkyl ether or alkanoyl ester of the enol form of I, useful as antiinflammatory agents, were prepd. by isolation of II in the pressence of strong base. Thus, 10ml 5% aq. NaOH, 0.3g 5-(1-methyl-2-pyrrolyl)-4-phenylcarbamoylisoxazole and ethanol were heated for 5 min, and acidified with 5N HCl to give I(m.p. 170-172≰C).
Patent KR-910004173-B1 (KR)
Inventor: DANIKYCHI MACAGAZU
IPC: C07D237/18
Filed: 1984-06-22
Granted: 1991-06-24
Abstract: 내용 없음.
Patent KR-880001101-B1 (KR)
Title: Process for the preparation of stero painting and writing
Inventor: YANG WON-HO
IPC: B44C1/22
Filed: 1984-07-04
Granted: 1988-06-29
Abstract: A painting and calligraphic work is made with colored or noncolored resin on a calcareous mica schist, which is then immersed in hydrochloric acid containing some pigment to elute calcic part to a proper depth and etch the three dimensional configuration in harmony with the natural pattern of the mica schist.
Patent KR-850000061-B1 (KR)
Title: Process for preparing amidines
Inventor: RENNER ULRICH
IPC: C07D209/18
Filed: 1984-08-27
Granted: 1985-02-15
Abstract: N,N-bridged carboxylic acid amidines and their salts (I) were prepd. In (I), R1 is an aromatic radical ; R2 is an opt. esterified or amidated 1-carboxy-lower alkyl ; ph is opt. substd. 1,2phenylene; alk is an aliphatic radical sepg. the imino gp.  from methine gp. by 1-3 C atoms. Thus, 1g 1-phenyl-3,4-dihydro-pyrimido-(1,6-g) indole-5- acetonitrile was reacted with multivalent phosphoric acid at 100≰C to give 1-phenyl-3,4-dihydro-pyrimido (1,6-a) indole-5-acetic acid amide.
Patent KR-920009990-B1 (KR)
Inventor: HOSHINO KAZUO
IPC: C22C38/00
Filed: 1985-05-14
Granted: 1992-11-10
Abstract: 내용 없음.
Patent KR-900004006-B1 (KR)
Title: Micro processor system
Inventor: TAKENAKA TSUTOMU
IPC: G11C11/419
Filed: 1985-06-12
Granted: 1990-06-07
Abstract: The system has a read write controller for enabling disabling a read/ write control signal for accessing the memory and or I/O. A counter latches and updates the address. The data bus, through which the data is transferred, is converted. A timing generator comprises a detector for detecting that an instruction executed by the microprocessor is a word transfer instruction for the memory and or I/O. The number of times a read write control signal is generated is counted. A timing controller generates various signals when the word transfer instruction is executed. When the microprocessor performs the word transfer instruction, the read/ write control signal is enabled and disabled to perform two access signals.
Patent KR-900002571-B1 (KR)
Title: Refrigeration system
Inventor: FUMIO WADA
IPC: F16K27/02
Filed: 1985-07-26
Granted: 1990-04-20
Abstract: A check valve (14a) is inserted and sealingly mounted directly within a continuous and uninterrupted section of a coolant fluid tubing (14b).  The valve includes a stationary cylinder (24) sealingly fixed to the tubing section by a continuous circumferential crimp.  A closure member (25) has a number of radial, axially oriented vanes (26).  The accumulator (16) is mounted onto a closed shell (1a) of the compressior by a mounting bracket (12) and a clamp (13).  The check valve is disposed down or upstream of the accumulator in the fluid flow path.  The check valve includes a movable closure member cooperable with a seat, and the tubing section is circumferentially crimped a distance above the cylinder to allow axial movement of the closure.
Patent KR-930009625-B1 (KR)
Inventor: SAKEMOTO AKITO
IPC: G11B5/706
Filed: 1985-09-14
Granted: 1993-10-07
Abstract: 내용 없음.
Patent KR-930005354-B1 (KR)
Title: Torque-limited collar, joint, process for setting the joint and driver
Inventor: SEABROOK WING G
IPC: F16B23/00
Filed: 1986-02-14
Granted: 1993-06-19
Abstract: Axially-extending troughs (22) in a bark (18) of an internally threaded collar (10,200) receive setting balls (32) of a driver (30) that apply a torque to the collar (10,200) through the balls (32) bearing on the walls of the troughs (22). At a predetermined pre-load, the balls (32) fail the bark (18) and plow through it to develop circumferential furrows (114,206,208), and the torque application on the collar (10, 200) ends. A second torquing with balls (32) at a different axial plistion fails the bark (18) again at the same pre-load to compensate for any relaxation after the first torque application.
Patent KR-930011685-B1 (KR)
Title: Process for preparing 5-chloro-1,3,4-thiadiazol-2-yloxy-acetamide
Inventor: PARUSET HEIZ
IPC: C07D285/12
Filed: 1986-02-14
Granted: 1993-12-18
Abstract: 1. 5-Chloro-1,3,4-thiadiazol-2-yloxy-acetamides of the general formula (I)   see diagramm : EP0192117,P12,F1   in which R**1 and R**2 independently of one another represent straight-chain or branched alkyl with 1 to 8 carbon atoms, straight-chain or branched alkenyl and alkinyl each with 2 to 8 carbon atoms, cycloalkyl or cycloalkenyl, each with 3 to 7 carbon atoms, which optionally have one or more identical or different substituents (possible substituents being, in particular, alkyl radicals with 1 to 4 carbon atoms), or represent alkoxy, alkoxyalkyleneoxy or alkoxyalkyl, each of which is straight-chain or branched and has 1 to 8 carbon atoms in the individual alkyl or alkylene moieties, or represent halogenoalkyl with 1 to 8 carbon atoms and 1 to 5 halogen atoms or represent aralkyl with 6 to 10 carbon atoms in the aryl moiety and 1 to 2 carbon atoms in the alkyl moiety, as well as aryl with 6 to 10 carbon atoms which optionally has one or more identical or different substituents (possible substituents being : halogen, straight-chain or branched alkyl, alkoxy or alkylthio each with 1 to 4 carbon atoms, halogenoalkyl, halogenoalkoxy and halogenoalkylthio each with 1 to 2 carbon atoms and 1 to 5 halogen atoms, as well as nitro), or R**1 and R**2 together with the nitrogen atom to which they are bonded represent a saturated or unsaturated 5- to 7-membered heterocyclic ring which optionally has one or more identical or different substituents (possible substituents being : straight-chain or branched alkyl with 1 to 6 carbon atoms, also in the form of a fused ring system, aryl with 6 to 10 carbon atoms, also in the form of a fused ring system, or dioxyalkylene with 2 to 3 carbon atoms).
Patent KR-900006673-B1 (KR)
Title: Magnetic recording carrier
Inventor: YEO WOON-SUNG
IPC: G11B5/62
Filed: 1986-05-19
Granted: 1990-09-17
Abstract: The metallic thin film type magmetic recording carrier comprises a basic material film layer (11); a ferromagnetic metallic thin film of magnetic recording layer (12) formed on the basic material film layer (11) by a sputtering method; and a surface protection layer (13) applied on the magnetic recording layer (13). The surface protection layer comprises a 0.0009-1.8 mg/m2 of high polymer organic material mainly composed of a carbon fluoride.
Patent KR-890001846-B1 (KR)
Title: Switching element
Inventor: SONG HYO-IL
IPC: H01L23/52
Filed: 1986-07-24
Granted: 1989-05-25
Abstract: A high voltage switching element is made by sintering the mixing powder of 96mol.% zinc oxide and 4mol.% manganese fluoride, and has 600V operating voltage, 10mA operating current and no more than 20msec. switching time.  This invention has the advantages of the simple manufacturing process, widely adjustable voltage according to sintering temperatures and element thicknesses, and application of the switching element as temperature detector.
Patent KR-890005205-B1 (KR)
Inventor: KIM DOK-YEONG
IPC: E02D17/20
Filed: 1986-10-29
Granted: 1989-12-18
Abstract: 내용 없음.
Patent KR-920001715-B1 (KR)
Title: Apparatus and method for manufacturing of tile
Inventor: PARK YONG-SANG
IPC: F27B9/04
Filed: 1986-11-14
Granted: 1992-02-24
Abstract: The tunnel shaped baking furnace includes a preheating  part, a firing part and a cooling part. Further, a  carurizing  part  is formed at a side of the cooling part, and a rail (4) is  installed on the bottom of the carurizing part, so that  a  carburizing  car (3) can run on it. A carrying car (1) is  received  into  the  car (3). The loading, preheating, baking, carburizing and cooling  are carried out simultaneously at different  places  to  shorten,  the manufacturing time.
Patent KR-950006055-B1 (KR)
Inventor: EBIHARA NORIO
IPC: G06F12/04
Filed: 1987-06-19
Granted: 1995-06-07
Abstract: 내용 없음.
Patent KR-950007228-B1 (KR)
Inventor: DAVISON EDWARD
IPC: A61K31/44
Filed: 1987-08-05
Granted: 1995-07-07
Abstract: 내용 없음.
Patent KR-900003628-B1 (KR)
Title: Voice-post service method in telephone system
Inventor: LIM IN-TAEK
IPC: H04M3/42
Filed: 1987-08-27
Granted: 1990-05-26
Abstract: The circuit for providing consecutive seriuce by operating consecutive digit without a new call when a certain service is quitted includes a CPU (31) having subscriber's table for controlling the service, a trunk circuit (32) for switching subscriber's trunk and control circuit, an audio signal controller (33) for controlling audio data and guide audio data, and a hard disk (34) for storing audio data and guide audio data.
Patent KR-910001101-B1 (KR)
Inventor: MOULY RAYMOND J
IPC: C03B33/03
Filed: 1987-12-24
Granted: 1991-02-23
Abstract: 내용 없음.
Patent KR-900002650-B1 (KR)
Inventor: ROSENTAL JAMES M
IPC: H04R1/04
Filed: 1986-05-22
Granted: 1990-04-21
Abstract: 내용 없음.
Patent KR-960006286-B1 (KR)
Inventor: KOIDE KAZUO
IPC: H03K19/003
Filed: 1988-02-22
Granted: 1996-05-13
Abstract: 내용 없음
Patent KR-930005980-B1 (KR)
Inventor: TAKEUCHI HIROSATO
IPC: B23Q7/00
Filed: 1988-04-19
Granted: 1993-07-01
Abstract: 내용 없음.
Patent KR-900007828-B1 (KR)
Title: Method of baking bread from preserved dought
Inventor: KAGEYAMA MINORU
IPC: A21C3/02
Filed: 1988-06-17
Granted: 1990-10-20
Abstract: Bread is produced from preserved dough, by (a) mixing and kneading materials needed for desired type of bread, to make a dough body having a gluten network; (b) stretching this into an elongatd first form which is subjected to vibration such that a thixotropy effect appears without damaging the gluten network; and (c) cutting dough body into 2 or more parts, each of desired second form. Process then comprises (d) fermenting dough parts; (e) freezing them; (f) preserving them; then (g) baking or frying preseved prod. Puffy and tasty bread prod. is obtd. since dough does not becone deflated.
Patent KR-900006614-B1 (KR)
Title: Method to make partly metallising textiles by electroless electrochemical plating
Inventor: KOO YONG-HWA
IPC: C23C18/16
Filed: 1988-07-23
Granted: 1990-09-13
Abstract: Method for producing textile fabrics partially matallised comprises (i) sensitizing textile fabrics consisting of thermoplastic synthetic polymer, (ii) partially printing with printing paste consisting, of palladium chloride solution and watersoluble thickening agent, (iii) removing the thickened matter by rinsing process, and (iv) non- electrolytic plating the printed parts of textile fabrics.
Patent KR-960007497-B1 (KR)
Inventor: OGURA KUNIAKI
IPC: B22F1/17
Filed: 1988-08-01
Granted: 1996-06-05
Abstract: 내용 없음.
Patent KR-950005135-B1 (KR)
Inventor: BUTMAN BRYAN T
IPC: G01N33/569
Filed: 1988-08-06
Granted: 1995-05-18
Abstract: 내용 없음.
Patent KR-920007408-B1 (KR)
Inventor: ASAEDA DAGEAKI
IPC: H02J3/01
Filed: 1989-05-11
Granted: 1992-08-31
Abstract: 내용 없음.
Patent KR-910003121-B1 (KR)
Inventor: CHEU ZI-CHANG
IPC: B01D47/06
Filed: 1989-06-29
Granted: 1991-05-20
Abstract: 내용 없음.
Patent KR-960006776-B1 (KR)
Title: Apparatus for forming plastics coated tube
Inventor: ITZHAK BARNOACH
IPC: B29C69/00
Filed: 1989-07-29
Granted: 1996-05-23
Abstract: Plastics coated metal tube produced by folding a strip of metal into a tubular form, seaming the tube and immediately extruding layers of plastics material onto the inner and outer surfaces of the metal tube, and cooling the plastics layers by passing the tube through a water bath (19), contains air injected under pressure to assist adhering the extruded plastics coating onto the inner surface of the metal tube and to test the integrity of the tube. The invention provides apparatus comprising jaws (10),(11) which clamp the tube within the water bath in order to seal the tube while the inner coating is still plastic so that when the tube is cut into lengths at the seals the internal pressure is retained until the tube is eventually used.
Patent KR-920005656-B1 (KR)
Inventor: INOUE TAKESHI
IPC: G07F9/10
Filed: 1989-08-25
Granted: 1992-07-11
Abstract: 내용 없음.
Patent KR-910009658-B1 (KR)
Title: A process for manufacturing a very flexible synthetic leather
Inventor: HONG SANG-JIN
IPC: D06N3/08
Filed: 1989-12-13
Granted: 1991-11-25
Abstract: The synthetic leather is produced by (a) treating a dividable conjugated fiber of polyamide and polyester with an  oiling  agent to obtain a tow, and then treating the tow with a thickening agent to obtain a staple fiber, (b)  random-carding,  cross-lapping  and needle-punching the staple fiber to obtain a nonwooven fabric, (c) dipping the fabric into a ester-ether copolymer polyurethane soln. to obtain a leather-like sheet, (d) washing the  sheet  to  remove the oiling agent and the thickening agent, (e) slicing and buffing the sheet, and (f) surface-treating it with  a  polyurethane.  The leather is used in the mfr. of clothes and shoes.
Patent KR-0137965-B1 (KR)
Inventor: BULLIS ROBERT H
IPC: H01G7/00
Filed: 1989-12-30
Granted: 1998-05-15
Abstract: 내용 없음
Patent KR-930003022-B1 (KR)
Title: Porous, crystallized, aromatic polycarbonate prepolymer porous crystallized aromatic polycarbonate and production methods
Inventor: FUKAWA ISABURO
IPC: C08G63/80
Filed: 1989-09-29
Granted: 1993-04-16
Abstract: PCT No. PCT/JP89/00994 Sec. 371 Date Oct. 17, 1989 Sec. 102(e) Date Oct. 17, 1989 PCT Filed Sep. 29, 1989.A porous, crystallized, aromatic polycarbonate prepolymer is disclosed, which comprises recurring aromatic carbonate units and terminal hydroxyl and aryl carbonate groups, wherein these terminal groups are in a specific molar ratio, and has specific number average molecular weight, surface area and crystallinity. The prepolymer can readily be converted by solid-state condensation polymerization to a porous, crystallized, aromatic polycarbonate having excellent properties. The porous, crystallized, aromatic polycarbonate of the present invention can readily be molded to obtain a shaped, porous, crystallized polycarbonate. The porous, crystallized, aromatic polycarbonate and the shaped, porous, crystallized polycarbonate of the present invention have excellent heat resistance and solvent resistance and exhibit advantageously low water absorption so that these are suited for use as a filter material, an adsorbent or the like. The porous, crystallized, aromatic polycarbonate and the shaped porous, crystallized polycarbonate of the present invention can also readily be molded by a melt process into an article useful as engineering plastics, such as an optical element and an electronic component, which is appreciated since it is free of impurities, such as chlorine-containing compounds, and has excellent properties.