baber/WOPTO huggingface dataset:
Patent KR-860000516-B1 (KR)
Title: Process for preparing phenethylpiperidine compounds
Inventor: LAWSON JOHN E
IPC: C07D211/28
Filed: 1982-07-13
Granted: 1986-05-02
Abstract: Process for the preparationof phenethylpiperidine compds. of formula (I) [R1 = H, halogen, C1-4 alkyl, alkoxy, alkylthio; R2 = H, hydroxy, methoxy; R3,R4 = H, lower alkyl; X = NHCO, NHCS  was described. Thus, 2-(0-amiophenethyl)-1-methylpiperidine in benzene treated with phenylisocyanate in benzene at room temp. to give title compds. The title compds are used as antiarrhythmics.
Patent KR-870001198-B1 (KR)
Title: Anticorrosive coating process
Inventor: YAMABE MASAAKI
IPC: B05D7/14
Filed: 1983-02-04
Granted: 1987-06-20
Abstract: Metals, esp. steel are coated in 3 stages, with(I) an oiltype or alkyd-type primer,(2) a binder layer of phenol-modified alkyd type contg. a flaky pigment(I), and (3) a topcoat comprising (a) a copolymer consisting of 40-60mol.% fluoro-olefin(II); 5-45mol.% cyclohexy1 viny1 ether, 5-45 mol.% alky1 viny1 ether(III). 3-15 mol.% hydroxyalky1 viny1 ether(IV) and 0-30 mol.% other comonomer(s). and(b) a polyisocyanate, each stage being followed by air-drying. Opt. a sealing coat of an epoxide resin compsn.(V) contg. a polyamine or polyisocyanate as hardener is applied after(2), also followed by air-drying.
Patent KR-910003152-B1 (KR)
Title: Process for the preparation of hetero cyclic compounds
Inventor: SCHROMM KURT
IPC: C07D471/14
Filed: 1984-01-06
Granted: 1991-05-20
Abstract: Compounds of the formula   <IMAGE>   wherein (a) R1 is hydrogen, lower alkyl, lower alkoxy or 8-halo; R2 is hydrogen, lower alkyl, lower alkoxy or a fused benzene ring; and R3 and R4, together with each other, are -N=N-NH-; or (b) R1 and R2, together with each other, are -N=N-NH-; R3 is hydrogen, lower alkyl, lower alkoxy, 2-halo, 3-halo or 4-halo; and R4 is hydrogen, lower alkyl, lower alkoxy or a fused benzene ring; and non-toxic, pharmacologically acceptable salts thereof formed with an inorganic or organic base. The compounds as well as their salts are useful as antiallergics.
Patent KR-860001469-B1 (KR)
Title: 17-(isocyano-sulfonylmthylene)-steroids 17-(formamido-sulfonylmethylene)-steroids and their preparation
Inventor: LEUSEN ALBERT MATTHEUS VAN
IPC: C07J53/00
Filed: 1984-04-27
Granted: 1986-09-26
Abstract: 17-oxo-steroid(II) and sulphonylmethylisocyanide(CH-CH2SO2R3) were reacted to give a formamido compd. which was dehydrated to give 17- (isocyano-sulphonylmethylene)-steroid(I). In (I), R1 = H or C1-4 alkyl, or is absent in the case of a double bond between C10 and C1, C5 or C9 ; R2 = H or C1-4 alkyl; R3 = aryl opt. substd. by 1 or more halogen, alkyl, or C1-4 alkoxy; rings A,B,C, and D opt. contain 1 or more double bonds, are opt. substd. by 1 or more OH, amino, O atoms, halogens, alkyl, alkylene, alkoxy or alkoxy gps. and are opt. disubstd. by 1 or more epoxy, methylene, alkylenedioxy, alkylenedithio or alkyleneoxythio gps.
Patent KR-860000013-B1 (KR)
Title: Apparatus for preventing the inclusion of slag into the molten steel tapped from a convertor
Inventor: KUBO SUEKI
IPC: C21C5/46
Filed: 1984-08-09
Granted: 1986-01-30
Abstract: In a comverter for molten steel, an elongated stopper is pivotably suspended as a pendulum from a supporting arm and immersed in the molten steel. When steel is at a first level, the stopper is lowered temporarily to close the tap hole and to lift the molten steel to a first height, at which the molten steel flow out through the tap hole without incorporating floating slag. The stopper is maintained vertically, irrespective of converter tilt, and has a spherically shaped end portion, which maintains a constant space between it and the tap hole. A constant outflow of steel is produced and the whirling of the slag into the molten steel flow is prevented. On completion of outflow, the stopper is lowered into the tap hole.
Patent KR-870000672-B1 (KR)
Title: Multiplying circuit for muting in digital-audio tape recorder system
Inventor: NO IL-YONG
IPC: H03M13/00
Filed: 1984-12-12
Granted: 1987-04-04
Abstract: This invention is concerned with the circuit of the multiplication for muting in the Digital-Audio-Tape recorder. This circuit is made of 1st, 2nd shift registers, ROM for cosine, inverter, 2 x 1multiplexer, parallel multiplier and control circuits. So the circuit can compensate error data- < the interpolation circuits and decoder of the digital-audio-tape does not>. In case of changing Data-type, according to the control signal of the control circuits, a parallel multiplier is consisted newly, and then error data generated at the tape is compensated by the digital-audio tape-recorder circuit for muting.
Patent KR-870001188-B1 (KR)
Title: Friction device in damper disc
Inventor: OGA SYUGO
IPC: F16D13/64
Filed: 1985-03-04
Granted: 1987-06-16
Abstract: A clutch plate has a central flange located between two side plates(5), with intermediate plates(16) providing a friction hold. Friction pads are offset W.r.t each other on the two intermediate rings and have different diameters.  One set of friction pads acts in one direction, and the other set in the other direction.  The pads are offset radially and aperate independently to each other.
Patent KR-890003552-B1 (KR)
Title: Magnetic recording carrier
Inventor: KIMURA AKIHIRO
IPC: G11B5/667
Filed: 1985-04-17
Granted: 1989-09-23
Abstract: A magnetic recording medium, e.g. the metallic thin-layer type magnetic disc, comprises a surface coating of carbon nitride which has good antiwear properties, anti-steel properties, corrosion resistance and durability.
Patent KR-910000379-B1 (KR)
Inventor: VALE WYLIE W JR
IPC: G01N33/68
Filed: 1985-05-17
Granted: 1991-01-24
Abstract: 내용 없음.
Patent KR-870001190-B1 (KR)
Title: A camera tube of vidicon type
Inventor: CHOE KYU-MAN
IPC: H01J9/26
Filed: 1985-06-29
Granted: 1987-06-16
Abstract: This invention is concerned with the method of fixing the plate and valve of the vidicon-type cathode-ray tube with the Joule's heat, which is generated by the second current due to inductive voltage. The method is to fix an indum-ring in the plate and valve by direct heating.  By the generation of heat of indum-ring itself, the optical conductive matearial attached in a plate is not affected in electric characteristics.  As the indumring itself is heated uniformly, this method solves the problem that the valve and the plate is not fixed well.
Patent KR-920002826-B1 (KR)
Inventor: OGAWHA DOMOYA
IPC: C07H15/18
Filed: 1985-06-28
Granted: 1992-04-04
Abstract: 내용 없음.
Patent KR-880002133-B1 (KR)
Title: Real time image-digit conversion circuit
Inventor: LEE HYONG-JUN
IPC: H03M1/12
Filed: 1985-10-12
Granted: 1988-10-15
Abstract: The digitizer for operating in real time comprises a high threshold value detector (THD H), a low threshold value detector (THD L), D/A converters (D/A1, D/A2), a data input controller (DIC), the data output controller (DOC), an address generator (ADG), a buffer controller (CBF), a clock and control signal generator (CLCG), an A/D converter (A/D), a synchronization detecting circuit (STDE), a DMA switching circuit (DMAS/W), and a comparator (THDCOM).  The comparator comares the output of the converters and image signal provided through a buffer (BUF).  The output of the comparator is added with a detected synchronous signal and is provided as an image output signal.
Patent KR-900001054-B1 (KR)
Title: Electron gun of crt
Inventor: KO NAM-JE
IPC: H01J29/51
Filed: 1986-11-19
Granted: 1990-02-26
Abstract: The electron gun for improving the main electrode structure includes an outer upper cap (20) forming a main electron lens, a bottom plate (23) equipped with a field controller (11) for converging a number of electron beams, and a shield cup electrode (19) combined with an outer upper cylinder (21) connected to the bottom plate.  The bottom plate equips a number of passage cylinders (24) extended to the rib edge (22).
Patent KR-930011750-B1 (KR)
Title: Method for manufacturing a composite board
Inventor: WEBER JURGEN
IPC: B29C63/04
Filed: 1987-01-28
Granted: 1993-12-20
Abstract: 1. A process for the manufacture of a composite panels, in which the composite panel comprises a core panel (1), a cover panel (2), preferably a high pressure laminated panel (HPL-panl, DIN 16926), glued on to the upper surface of the core panel, an edge strip glued on to the edge (3) of the core panel (1), and a protective sheet (4) or the like glued on to the lower surface of the core panel (1) and, preferably, the cone panel (1) is rounded off at edge (3) and the cover panel (2) is drawn around the rounded-off edge (3) of core panel (1) particularly as far as the lower surface of core panel (1), to form the edge strip, in which a slot (5) extending approximately parallel to edge (3) is formed, and in particular is milled out, on the lowder surface of core panel (1) at a definite distance from edge (3), subsequently the cover panel (2) and the protective sheet (4) or the like are so glued on to the core panel (1) that their edge (8, 9) project a little into the slot (5) formed on the lower surface of core panel (1) but leave an access gap (10) open between the edge (8, 9), after which a filling (6) of sprayable synthetic material is fed into the slot (5) at least as far as the inner surfaces of the cover panel (2) and/or the protective sheet (4) or the like, and finally, after hardening of the sprayable synthetic material, a drip slot (7) is formed, and in particular is milled out, in the filling (6).
Patent KR-900006878-B1 (KR)
Title: Electronic distribution backup apparatus
Inventor: SASAKI SYOZI
IPC: F02P7/067
Filed: 1987-03-23
Granted: 1990-09-24
Abstract: An auxiliary revolution sensor (16) is disposed for detecting a reference position signal (16a) of each cylinders. A computer (3) outputs an auxiliary reference cylinder signal (3d) by the reference position signal (16a). A pseudo reference position signal generator (12,13,14,15) produces a pseudo reference position signal (15a) by the auxiliary reference cylinder signal (3d). An electronic distributor (5) outputs ignition signals (6) to ignitors (6-11) by outputting signals of the pseudo reference position signal generator and the computer, when a revolution sensor (1) is out of order.
Patent KR-900000931-B1 (KR)
Title: Process for making of processed food for peanut and a dried squid
Inventor: PARK KWANG-SON
IPC: A23L17/00
Filed: 1987-06-19
Granted: 1990-02-19
Abstract: The method for preparing food containing peanuts and cuttle fish simultaneously comprises: (a) forming perforated parts having many vertical and horizontal perforated lines in a cuttlefish body; (b) forming the part catching peanuts by horizontal perforated lines; (c) inserting peanuts in the beneath of the above parts (b) to fix peanuts in a cuttlefish body.
Patent KR-960000916-B1 (KR)
Inventor: BLOOM STANLEY
IPC: H01J29/48
Filed: 1987-06-26
Granted: 1996-01-15
Abstract: 내용 없음.
Patent KR-900001442-B1 (KR)
Title: Automatic parking brake for automobile
Inventor: EOM DUN-DO
IPC: B60T7/12
Filed: 1987-08-11
Granted: 1990-03-10
Abstract: An automatic parking brake comprises a driving section (11), a working section (21), a link assembly (31), and a switch circuit. The driving section able to rotate in CCW and CW direction by direct circuit comprises a DC reduction driving motor (13) operating by the ON-OFF of a key switch (42), a screw (15) attached to the motor shaft, and a screw nut (17) having a link plate (16).  The working section comprises a moving member (23), a rail for guiding the movement of the moving member.  The link assembly is provided for connecting the link plate with the moving member.  The switch circuit has a circuit (44) for rotating the motor in CW direction when ON/ START is ON, and anoher circuit (46) for rotating the motor in CCW direction when AC/LOCK is ON.
Patent KR-900008749-B1 (KR)
Inventor: SATO YOSHINOBU
IPC: H02P6/08
Filed: 1987-11-16
Granted: 1990-11-29
Abstract: 내용 없음.
Patent KR-900006263-B1 (KR)
Title: Signal osailator for measuring noise
Inventor: CHOI HAE-RYUL
IPC: H04M3/34
Filed: 1987-12-15
Granted: 1990-08-27
Abstract: The oscillator for measuring the crosstalk with one transmission impairement measuring set (TIMS) comprises an oscillation circuit (10) providing oscillation signal with a certain frequency, a fine gain adjusting circuit (20) adjusting the gain of the oscillation circuit finely, and a matching circuit (30) matching the oscillation signal to the subscriber line of the telephone exchanger. The oscillation frequency is determined by values of resistors (R13,R5) and capacitor (C2,C3), and the magnitude of the oscillation by values of resistors (R3, R4) and variable resistor (VR1).
Patent KR-940006264-B1 (KR)
Title: Auto-clock control method
Inventor: KWAK KUK-YON
IPC: H04B1/16
Filed: 1987-12-31
Granted: 1994-07-13
Abstract: converting an amplified audio demodulation signal to a pulse signal corresponding to an interval higher than a prescribed reference voltage and transmitting the converted signal to a microprocessor; checking the pulse signal, and if it is a high potential, delaying the pulse signal, again checking the pulse signal, and if it is a low potential, delaying the pulse signal, and again checking the pulse signal; if the pulse signal is a high potential, increasing a counter and repeating the above steps; and adjusting a minute and a second, thereby accurately adjusting a time without an external additional operation.
Patent KR-950006184-B1 (KR)
Inventor: SENSI JOHN E
IPC: C03B5/187
Filed: 1987-12-31
Granted: 1995-06-12
Abstract: 내용 없음.
Patent KR-970000637-B1 (KR)
Title: Hybridoma cell lines and their monoclonal antibodies to human pluripotent granulocyte colony stimulating factor
Inventor: CHANG DAVID
IPC: C12N5/18
Filed: 1986-11-26
Granted: 1997-01-16
Abstract: Murine-derived hybridoma tumor cell lines and monoclonal anti-human pluripotent Granulocyte Colony Stimulating Factor antibody substances produced by these cell lines. Use of said monoclonal antibody substances, alone or in combination, in immunological procedures for isolation of human pluripotent Granulocyte Colony Stimulating Factor and for quantitative detection of human pluripotent Granulocyte Colony Stimulating Factor in fluid samples.
Patent KR-960002618-B1 (KR)
Title: Process for the cyclic production of hydrogen peroxide
Inventor: PRALUS CHRISTIAN
IPC: C01B15/023
Filed: 1988-04-15
Granted: 1996-02-24
Abstract: A process for the cyclic production of hydrogen peroxide comprising alternating the reduction of oxidation of a quinone in a solvent medium and extracting the hydrogen peroxide. The solvent medium contains a carboxylic acid amide comprising at least one aryl group to satisfy one of the following conditions: (a) an aryl group is attached to the nitrogen or the carbon of the carbonyl; or (b) an aryl group is attached to the nitrogen and another aryl group, which is the same or different, is attached to the nitrogen or to the carbon of the carbonyl.
Patent KR-970003814-B1 (KR)
Inventor: PATRICE BERNARD
IPC: G21C17/00
Filed: 1988-04-23
Granted: 1997-03-22
Abstract: 요약 없음
Patent KR-970003951-B1 (KR)
Title: Rubber-modified cyanate ester resins, their preparation and polytriazines derived therefrom
Inventor: YANG PHILIP C
IPC: C08L15/00
Filed: 1988-07-30
Granted: 1997-03-24
Abstract: Polytriazines exhibiting improved toughness without sacrificing heat resistance are prepared by curing a cyanate ester resin having dispersed therein resin-insoluble rubber particles grafted with a resin-soluble polymer. The resin-soluble polymer stabilizes the rubber particles and maintains the particles in an essentially discrete, nonagglomerated form
Patent KR-910007589-B1 (KR)
Inventor: KERR STUART R III
IPC: C08J7/046
Filed: 1988-12-30
Granted: 1991-09-28
Abstract: 내용 없음.
Patent KR-960012071-B1 (KR)
Inventor: YUKIHIKO TAGUCHI
IPC: F04B27/14
Filed: 1989-01-13
Granted: 1996-09-12
Abstract: 내용없음
Patent KR-910003578-B1 (KR)
Title: Filter of radio-active waste matter
Inventor: KIM JUN-HYUNG
IPC: G21F9/28
Filed: 1989-02-02
Granted: 1991-06-05
Abstract: The apparatus  having  a  centrifugal  dust-collector  and  a ceramic  filter,  performs   secondary   combustion   of   unburnt inflammable elements in hot exhaust gas which  is  generated  from incineration  of  nuclear  solid  wastes,  and  trapping  of   the particulate. The apparatus  comprises  the  process  piping  being coated with fire-proof cement (1) for passing hot exhaust gas (2); burner (3) for reburning;  centrifugal  dust  collector  (4)  with lower rotary valve (5) and ash tray (6); porous ceramic filter (7) including filter body (8) penetrated with the compressed-air inlet pipe.
Patent KR-0120921-B1 (KR)
Inventor: SUGANO TOSHIO
IPC: H05K1/00
Filed: 1989-02-16
Granted: 1997-10-27
Abstract: 내용 없음.
Patent KR-920007430-B1 (KR)
Inventor: LEE JIN-HO
IPC: H01C17/16
Filed: 1989-02-27
Granted: 1992-08-31
Abstract: 내용 없음.
Patent KR-930004734-B1 (KR)
Inventor: SHIMADA HARUKI
IPC: F16L37/12
Filed: 1989-04-27
Granted: 1993-06-03
Abstract: 내용 없음.
Patent KR-910010200-B1 (KR)
Inventor: SIRAKAWA HIROYUKI
IPC: H05K3/30
Filed: 1989-04-28
Granted: 1991-12-20
Abstract: 내용 없음.
Patent KR-910005844-B1 (KR)
Title: Circuit for filing printer port output data
Inventor: LEE JI-EUNG
IPC: G06F3/00
Filed: 1989-05-31
Granted: 1991-08-05
Abstract: This circuit filing the data from the printer port  includes, a computer slot (10)  in  which  an  input/outptu  (I/O)  card  is installed to receive the data, a PPI (20) to select fonts  by  low significant address provided through the slot (10), a decoder (30) to decode the most significant address provided from the slot (10) and to make PPI(20) select the chip, a printer port interface (40) the connected to a computer generating the print data.
Patent KR-0130970-B1 (KR)
Title: Resins curable into fire-retardant and heat-resistant plastic materials and method for their preparation
Inventor: SCHREIBER HERBERT
IPC: C08K3/00
Filed: 1989-07-18
Granted: 1998-04-13
Abstract: Flame-retardant and heat-resistant plastics are obtained by curing a curable resin which, at least partially, comprises a mixture of
 (a) a resin component which contains or comprises at least one thermocurable compound containing 1-oxa-3-azatetraline groups; and
 (b) a second component which contains or comprises at least one flameproofing agent which is immiscible with the resin component, in particular one or more of the following substance groups or substances:
 aluminium hydroxide;
 hydrated calcium/magnesium carbonate;
 magnesium hydroxide;
 elemental red phosphorus;
 oxo-acids of phosphorus;
 inorganic salts of oxo-acids of phosphorus;
 organic salts of oxo-acids of phosphorus;
 polyphosphates;
 boric acid;
 salts of boric acid, preferably zinc borate; and expediently contains, in addition, at least one curable epoxide compound.
Patent KR-930007610-B1 (KR)
Inventor: UEDA KATSUNORI
IPC: B60K28/16
Filed: 1989-12-01
Granted: 1993-08-13
Abstract: 내용 없음.
Patent KR-0152982-B1 (KR)
Inventor: GOLDENBERG JILL F
IPC: G02B27/28
Filed: 1989-12-22
Granted: 1998-11-16
Abstract: 시스템의 광도를 증가사키기 위한 LCD 디스플레이 시스템용 조명 시스템. 상기 시스템 광원(20)으로부터의 광 빔(24)을 두 개의 직교 편광되는 빔(28, 30)으로 분광하는 편광빔 분광기(26)를 포함한다.  원하는 편광 방향의 빔(28)을 프리즘(10)의 제1면(A)을 통해 향하게 함으로써 상기 빔은 프리즘(10)의 제2면(B)에서 반사되어 제3면(C)을 통해 출사된다.  편광되지 않는 방향의 다른 빔(30)은 편광 방향을 90。회전시키는 장치(36)을 통과해서 상기 프리즘으로 굴절되는 각도에서 프리즘(10)의 제2면의 아래 쪽으로 향하게 된다.  그런 다음 상기 두 빔(28, 30)은 프리즘의 제3면을 통해 프리즘으로부터 출사하게 되는데, 동일한 편광방향을 가지게 되며 단지 약간의 발산될 뿐이다.  재결합된 빔은 그후 광 변조 시스템 쪽으로 향하게 된다.  조명 시스템은 공기-유리 인터페이스의 수와 반사 표면의 수를 줄이게 된다.
Patent KR-970000006-B1 (KR)
Inventor: HUJIDA GOUJI
IPC: B65G15/02
Filed: 1989-12-22
Granted: 1997-01-04
Abstract: 내용 없음.
Patent KR-920001477-B1 (KR)
Inventor: MASUBAYASI GANEO
IPC: A22C25/00
Filed: 1989-12-28
Granted: 1992-02-15
Abstract: 내용 없음.
Patent KR-100188303-B1 (KR)
Inventor: LA VOS PETER GEORGE
IPC: B65H3/12
Filed: 1990-03-15
Granted: 1999-06-01
Abstract: 내용 없음.
Patent KR-0134617-B1 (KR)
Inventor: CARRE JEAN-JACQUES
IPC: B60T13/72
Filed: 1990-04-27
Granted: 1998-04-23
Abstract: 요약 없슴
Patent KR-920009232-B1 (KR)
Title: Remote controller
Inventor: HIROJAWA SEKI
IPC: H04Q9/00
Filed: 1990-05-24
Granted: 1992-10-15
Abstract: The remote controller is used for controlling  gas,  oil,  or electric water-heater. The controller has a  hollow  flat  plastic box-type main frame (1), cover plate (70) at  concave  section  on reinforcing frame for forming display window (30), a plurality  of switches  (10)  on  the  outer  surface.  The  plate  (70)  has  a rectangular hole (71) opposite to the switch position (10) and  is covered with a flexible film.
Patent KR-920008790-B1 (KR)
Title: Apparatus of assembling shadow mask with frame
Inventor: KANG JONG-SU
IPC: B23P19/04
Filed: 1990-05-25
Granted: 1992-10-09
Abstract: A coupling device for bonding between a  shadow  mask  and  a frame of the cathode ray tube provides a  shadow  mask  supporting bed (33) raised and lowered through a given distance  by  a  hoist (34) when the frame (10) is held in a  correct  position,  thereby the skirt portions (21) of the shadow mask (20) inserted into  the frame (10). With the shadow mask raised, several  pressure  plates (32) on reciprocating rods (35) are brought to bear on  the  skirt portions (21). The top inner sections of the pressure plates  (32) may incorporate recesses (31) for  holding  the  frame  (10).  The coupling device bonds between the shadow mask and the CRT frame as simple structure.
Patent KR-0173682-B1 (KR)
Title: Rotary head type magnetic tape apparatus
Inventor: NOGUCHI MASAYOSHI
IPC: G11B15/46
Filed: 1990-12-21
Granted: 1999-04-15
Abstract: A rotary head magnetic tape apparatus, in which a take-up reel is driven in a controlled manner so that the detected tape running speed is equal to a reference tape running speed corresponding to preset tape speed data, and the rotary drum is driven in a controlled manner so that the detected drum rotating speed is equal to a reference drum rotating speed associated with the preset tape speed data, such that the speed of the magnetic tape relative to the magnetic head provided on the rotary drum may be accurately maintained. <IMAGE>
Patent KR-930006552-B1 (KR)
Title: Analog out trunk circuit apparatus of exchange system
Inventor: PARK SONG-SU
IPC: H04Q3/64
Filed: 1990-12-31
Granted: 1993-07-16
Abstract: The device enables another switchboard to be matched  with  a 2D/2K selector (ST switchboard), a RSC (EMD switchboard) and a ITC (ESS switchboard) when the other switchboard is two wire type  and also with a 1-A selector (ST switchboard) when it  is  three  wire type. It  includes  an  overvoltage  protecting  section  (1)  for safeguarding an outputting/relaying  circuit,  a  test  connecting section (2) connected to the overvoltage protecting section (1), a detecting section  of  relay  line  state  (3)  for  watching  the condition of a relay line, and a 2 wire/4 wire converting  section (5) for separating/combining the Tx/Rx wire of analog voice.
Patent KR-940003867-B1 (KR)
Title: Forming method of polyester resin and its coating composition
Inventor: KWON O-WON
IPC: C08G63/16
Filed: 1990-12-31
Granted: 1994-05-04
Abstract: The low-temp. curable polyester resin is prepd. by: (A) preparing prepolymer of 30-150 hydroxy value by reacting the org. monomer mixt. (a) contg. 2 or more reactive carboxyl gp. with the mixt. (b) comprising two or more aliphatic alcohol of two or more valence, in the condition of 1.1-1.5 equivalent ratio of alcohol/acid; (B) reacting the prepolymer with the acid mixt. comprising (w.r.t. amt. of the prepolymer) 5-15 wt.% pyromelitic dianhydride, 5-15 wt.% adipic acid or agelainic acid, 5-15 wt.% trimelitic acid anhydride; then adding 0.1-2.0 wt.% of tetraethyl ammonium halogenide of formula (I) as a reaction promotive agent. The obtd polyester resin has 30-100 of acid value, 1000-8000 of number ave. Mw, and contains 4 or more the reactive carboxylic gp..