baber/WOPTO huggingface dataset:
Patent KR-870001031-B1 (KR)
Title: Method of/and apparatus for attaching fly strips to a slide fastener chain
Inventor: BOWZER RONALD J
IPC: A44B19/42
Filed: 1984-06-07
Granted: 1987-05-25
Abstract: A method of sewing fly strips onto a continuous slide fastener chain by passing the chain through a sapping unit to form fastener element- free gaps between predetermined ungopped lengths. The gapped chain is then delivered from the gapping unit to a sewing station defined by a sewing machine.  Fly strips are successively fed from a stack along a feed path to the sewing station.  Gaps in the chain are detected to trigger the start of each successive feeding step and the respective fly strips and chain lengths are advanced through the sewing station for sewing the fly strips anto the chain.
Patent KR-900001103-B1 (KR)
Title: Tape cassette dust door spring assembly and method for assembling same
Inventor: GELARDI PAUL J
IPC: G11B23/087
Filed: 1984-07-12
Granted: 1990-02-26
Abstract: The door assembly comprises a pivot peg (40) for the tape cassette door, and a spring (56) having short and long legs (54,58) angled to each other.  The pivot peg (40) has one fixed end and one rounded free end.  The rounded free end has a wide slit (48) extending the full width of the free end and traversing approximately 60 deg. which leads to a narrower slit (50) extending towards the fixed end.  The short leg of the spring is positioned within the narrower slit in the peg. while the second leg acts against the door to apply the spring torsion.  A round recess (52) in the base of the narrower slit in the peg retains the short spring in position.
Patent KR-860000519-B1 (KR)
Title: Slide fastener's making apparatus with flies
Inventor: YUNOKI AKIO
IPC: A44B19/62
Filed: 1984-10-06
Granted: 1986-05-08
Abstract: Automatic appts. for mfg. slide fasteners with files comprises rollers which feed a gapped fasteners chain carried by a fly strip through a strip folder preceding a unit for applying sliders, a unit for applying bottom end stops and cutting the chain across its gaps, and discharge rollers which operate in synchronism with the feed rollers, the latter engaging the fastener chain intermittently to effect feeding.
Patent KR-890003188-B1 (KR)
Title: Telephone system
Inventor: TATZMI GAOLU
IPC: H04M3/533
Filed: 1984-11-16
Granted: 1989-08-25
Abstract: The telephone having answering function includes a DTMF signal decoder (10) for decoding the DTMF signals transmitted according to the key operation of the transmitter, and a memory for storing the key data coresponding to the output signals of the DTMF signal decoder.  The DTMF signals are corresponding to the transmitter's phone number and the data stored in the memory includes the transmitter's phone number.
Patent KR-890002431-B1 (KR)
Title: Compatibilized of acrylic ester
Inventor: PATEL RAMAN
IPC: C08L51/00
Filed: 1984-12-21
Granted: 1989-07-03
Abstract: A compatibilized acrylester copolymer rubber blend comprises 1-99 wt.% of an olefin polymer contg. amorphous or crystalline satd. homopolymers or copolymers of C2-8 alpha monoolefins, 99-1 wt.% of an acrylic ester copolymer rubber contg. 0.1-25 mol.% of carboxylic acid, and at least 0.1 wt.% of a graft copolymer contg. at least one olefin polymer compatibilizing segment and at least one acrylic ester copolymer rubber compatibilizing segment.
Patent KR-890004103-B1 (KR)
Title: Process of preparing antibodies for inhibiting peridontitis
Inventor: SURUMIZU DAGASI
IPC: A61K9/68
Filed: 1984-12-28
Granted: 1989-10-20
Abstract: An antibody for periodonititis is prepared.  Thus, Actinomyces viscosus mutant strain K-TL+(FERM-411) is cultured in a medium containing 1.7% tryptocase peptone, 0.3% pyton peptone, 0.5% yeast extract, 0.25% K2HPO4, 0.5% NaCl, and 0.25% glucose (pH=7.4) at 37 C for 24hrs.  The culture broth is 33%-saturated with (NH4)2SO4 and treated with 0.1M phosphate buffer-1M NaCl solution.  The solution is dialysed, condensed by treating polyvinyl pyrrolidone, diluted with freund's complete adjuvant, and injected subcutaneously into rabbit to give an antibody for periodontitis.
Patent KR-880000217-B1 (KR)
Title: Manufacturing process of a thick beef soup
Inventor: IM KON-RAE
IPC: A23L13/30
Filed: 1985-03-12
Granted: 1988-03-15
Abstract: Instant beef soup was prepd.  Thus, 2kg cow bones and 0.5kg beef were added into 20 liter of boiling water and heated for long hour to give 9 l of beef soup. 1kg washed rice and 0.2kg barley were cooked in 1.7 l of the beef soup and dried with hot-air at 50-60≰C to give 0.9kg of cooked dried rice (20% H2O) having a taste of beef (I).  The boiled beef was sliced into 2mmX2cmX2cm size and dried to give 0.35kg of slices of hard-boiled beef (20% H2O) (II).  (I) and (II) were wrapped together with a dried spices to give the final product.
Patent KR-920003698-B1 (KR)
Title: Furnace hearth
Inventor: HALAWATSCHEK HARTMUT
IPC: F27B14/10
Filed: 1985-03-12
Granted: 1992-05-09
Abstract: A hearth for use in a furnace, which comprises an upper layer of magnesia containing chromic oxide, a lower layer containing graphite and an organic bonding agent, and an intermediate layer of a mixture of the materials forming the upper and lower layers. The hearth is particularly useful in DC arc funaces, in which steel rods embedded in the bottom act as the anode. The hearth has improved service durability.
Patent KR-900001109-B1 (KR)
Title: Magnetic-pole cores for electro rotary machines
Inventor: KOMATSU FUMITO
IPC: H02K1/08
Filed: 1985-04-25
Granted: 1990-02-26
Abstract: The core comprises two flat discs or rings (16) around the peripheries of which are formed upstanding pole sections (17)(17'). The two discs are mounted in mutually inverted relationship on either side of a coil (14) wound concentric with the motor shaft (13).  The resulting pole faces depend alternately on the two discs (16) to provide alternate north and south poles. Each pole section (17) has a main section (20) and a second section (21).  The main section has a shaped integral portion (22) extending partway towards its associated second section (21). This enables the magnetic pole centre to deviate circumferentially from the physical pole centre
Patent KR-920002316-B1 (KR)
Inventor: UEHARA TADAYOSHI
IPC: F16K31/42
Filed: 1985-05-17
Granted: 1992-03-21
Abstract: 내용 없음.
Patent KR-870001166-B1 (KR)
Title: Process for preparing furan derivatives
Inventor: BUGGY THOMAS
IPC: C07D307/52
Filed: 1985-09-19
Granted: 1987-06-15
Abstract: Ranitidine having formula (I) is produced from methylation of (II). The methylating agents are methyl halide, dimethyl sulfate or methyl sulfonic ester.  The rxn. performed in the presence of base i,e, sodium (or potassium)carbonate(or bicarbonate), pyridine or triethylamine.  The rxn. temp. is 0-50deg. N-[2-[[[5-[methylamino) methyl -2-furanyl methyl thio ethyl -N'-2-nitro-1,1ethenediamine salt with HCl in MeOH and K2CO3 are treated with iodomethane for 5 hr to give N-[2-[[[5-[dimethylamino)methyl 2ffuranyl -methyl thio ethyl - N'-methyl-2-nitro-1, 1-ethene diamine.
Patent KR-940010766-B1 (KR)
Inventor: NAUMANN KLAUS
IPC: A01N53/00
Filed: 1986-04-18
Granted: 1994-11-11
Abstract: 내용 없음.
Patent KR-900007362-B1 (KR)
Title: Ball-type differential speed reducer structure
Inventor: IMASE KENJI
IPC: F16H1/32
Filed: 1986-06-26
Granted: 1990-10-08
Abstract: A gearless differential speed reducer structure comprising: an input shaft (11), a shaft (8) eccentrically fixed to the input shaft (11), a first disc (6) rotatably mounted on the shaft (8), one of a hypocycloidal and epicycloidal groove (16) provided on a first surface of the first disc (6), a second disc (4) having a central hole through which the shaft (8) extends, the second disc being fixed to a stationary member (1), and parallel to the first disc, facing the grooved surface of the first disc (6), the other of an epicycloidal and hypocycloidal groove (15) provided on a surface of the second disc facing the first surface of the first disc (6), the epicycloidal and the hypocycloidal grooves (15,16) forming closed loops, a plurality of rollable balls (17) placed in the hypocycloidal groove and the epicycloidal groove.
Patent KR-900002611-B1 (KR)
Title: Magnetic recording carrier
Inventor: KIM JONG-KI
IPC: G11B5/72
Filed: 1986-08-09
Granted: 1990-04-20
Abstract: A compsn. for magnetic layer of a magnetic recording carrier comprises (a) 78 wt.% Co, (b) 21 wt.% Ni, and (c) rare-earth metal i.e. 1 wt.% Pr.  The magnetic tape shows improved anti-corrosion, and is applicable to high density (HD) audio and video recording carrier.
Patent KR-900004385-B1 (KR)
Title: Carboxamide derivatives and preparing process thereof
Inventor: BERNSTAIN ROBERT P
IPC: A61K31/415
Filed: 1986-10-16
Granted: 1990-06-23
Abstract: Carboxamide derivs. of formula (I) are prepared. In (I) X-Y-Z gp. is C=CH-N, C=N-N, N-(CH2)2-N, CH-CH2-N or N-N=C; A is direct link or O; R1 is C2-10 alkyl, phenyl-C1-6 alkyl, C3-8  cycloalkyl or C3-8 cycloalkyl- C1-6 alkyl; Ra is H or methyl; Rc  is H or C1-4 alkoxy; Rd is H, C3-8 cycloalkyl, C3-8 cycloalkyl-C1-4  alkyl or C1-1- alkyl; M is acidic gp. (I) are leukotriene antagonists used in the treatment of allergic diseases.
Patent KR-950001992-B1 (KR)
Title: Method of producing peptides
Inventor: MAEDA SUSUMU
IPC: C07K14/56
Filed: 1986-11-14
Granted: 1995-03-08
Abstract: Recombinant Bombyx mori nuclear polyhedrosis viruses having, in the polyhedral protein-encoding structural gene portion of the Bombyx mori nuclear polyhedrosis virus DNA (BmNPV DNA), a structural gene for a desired protein as joined to the whole of or a part of the polyhedral protein-encoding structural gene with or without interposition of a linker base sequence are provided. By propagating the above viruses in silkworm-derived cells or silkworms, fused proteins of a desired protein and the whole of or a part of the polyhedral protein as joined together with or without interposition of a linking amino acid or peptide are produced. The desired proteins can be obtained from the fused proteins by cleavage or decomposition at the linking site.
Patent KR-900002875-B1 (KR)
Title: Method of locking vehicle door and thereof device
Inventor: GODANDA MOTOHIRO
IPC: E05B83/36
Filed: 1986-12-12
Granted: 1990-05-01
Abstract: An engaging portion is provided in an operating plate (11) and engageable with a latch to prevent the latch means from disengaging from a strike.  The position of the engaging portion is detected and electrically coupled to an engine starting circuit to make the circuit operable only upon detection of the movement of the portion from the first to second position.  By connecting a timer several switches and by providing a reset button and a cautionary/alarm sound generator to the timer, it is possible to produce a cautionary or alarm sound when the door is unlocked by manually turning the key rather than by automatic actuation of the solenoid.
Patent KR-900000986-B1 (KR)
Title: Electric discharge measuring apparatus
Inventor: KIM KWANG-HWA
IPC: G01R31/36
Filed: 1987-05-14
Granted: 1990-02-23
Abstract: The instrument for measuring the number and amount of partial discharging includes a testing transformer (u) for making a partial discharging pulse in the defect of sample (Cx), a measuring instrument (M) for measuring the amount and numbers of partial discharging, a voltage divider (VD) for providing test signal into a phase adjuster (P1), a filter (11) for extracting the discharge pulse by removing the test voltage, a pulse generator (P2) for generating pulse compared to discharge pulse, a classifier (16) for classifying the discharge pulse according to positive or negative polarity, a comparator (17,17a) for filtering the pulse and a discriminator (18,18a) for reducing the error caused by the variation of the pulse.
Patent KR-960002002-B1 (KR)
Inventor: MANFRED EICH
IPC: G11B7/24044
Filed: 1987-07-11
Granted: 1996-02-09
Abstract: 내용 없음.
Patent KR-900000854-B1 (KR)
Title: Process for preparing micro capsules of dried ex. of herb
Inventor: HUH JAE-DOO
IPC: A61K9/50
Filed: 1987-07-31
Granted: 1990-02-17
Abstract: A method for preparing a micro capsules is described.  Thus, 20-60% of matrix composed of methyl cellulose, ethylcellulose, HMC, HPC, polyvinyl alcohol, or polyvinyl acetate, etc. is sprayed into a saturated solution containing organic solvent, mixed with agitation at 30-60≰C for 12-24hrs, then blended with medicinal herbs extract, and freeze-dried or spray-dried to give microcapsule.  To prepare a medicine for cold, a mixture containing the microcapsule described above (220 mg), 120 mg acetaminophene malate, and 3.75 mg aluminum stearic acid is filled in a soft capsule.
Patent KR-900006889-B1 (KR)
Title: Pasteurization of immuno-globulin solution
Inventor: MAGNINE ANTONY A
IPC: A61K38/16
Filed: 1987-11-25
Granted: 1990-09-24
Abstract: Process for pasteurising aq. immunoglobulin solns. (protein content less than 5 wt.%, pH about 3.5-6.5, ionic strength less than 0.00005 mol/dm3) comprises heating at about 35-75 deg.C pref. 50-60 deg.C for at least 10 hr. The presence of additives, stabilisers or excipients is not necessary, and less than about 5% aggregation of immunoglobulin occurs, without significant loss of physiol. activity. The process inactivates viruses which may be present.
Patent KR-910008630-B1 (KR)
Inventor: SIGURD NILSSON U
IPC: F16J15/06
Filed: 1986-08-12
Granted: 1991-10-19
Abstract: 내용 없음.
Patent KR-970001540-B1 (KR)
Inventor: MOTOYUKI YAMATO
IPC: C08L65/00
Filed: 1988-03-16
Granted: 1997-02-11
Abstract: 내용 없음.
Patent KR-910007565-B1 (KR)
Inventor: HUKUDA DATEMI
IPC: B65H67/06
Filed: 1988-04-07
Granted: 1991-09-27
Abstract: 내용 없음.
Patent KR-910002952-B1 (KR)
Title: Making process for contact of air circuit breaker
Inventor: KIM WOO-YOUNG
IPC: C22C27/04
Filed: 1988-04-14
Granted: 1991-05-11
Abstract: Contact material is prepared in such a manner  that  100  wt. parts tungsten powder of 6-4 micron particle size is admixed  with 0.4-3.0 wt. parts Ni and  Co  and  2.0-5.0  wt.  parts  MgST.  The contact material is pressed, sintered at 1400 deg.C for 2 hrs  and infiltrated with Ag at 1100 deg.C for 1 hr. The contact element is useful for an air circuit breaker, and has a  good  resistance  to arc, wear, oxidation and welding.
Patent KR-910006370-B1 (KR)
Inventor: ABE MASAHIRO
IPC: H01L21/3065
Filed: 1988-04-16
Granted: 1991-08-21
Abstract: 내용 없음.
Patent KR-950005607-B1 (KR)
Title: Teletext television circuit
Inventor: KIM CHOL-JIN
IPC: H04N7/08
Filed: 1988-06-17
Granted: 1995-05-27
Abstract: The teletext receiving circuit prevents error operation in the mode switching, and particularly distinguishes modes of a teletext signal and a television broadcasting signal to switch. The circuit includes a channel tuner, a tuner part, a video intermediate frequency amplifying and detecting part, a video signal processor, a synchronizing signal separator, a character signal selector, an AND gate, a microcomputer, a character signal processor, a signal composite part, a high voltage generator, and a CRT.
Patent KR-930010178-B1 (KR)
Title: Channel change reserving method for tv tuner
Inventor: LEE SONG-MO
IPC: H04N5/50
Filed: 1988-10-26
Granted: 1993-10-15
Abstract: The method changes channel  on  reserved  time  according  to preset times  and  channels.  The  method  for  reserving  channel comprises the steps of: (A) checking current mode;  (B)  receiving data, time and channel number when reserving mode is selected; (C) checking key signal (KEY1) input  when  reserving  data  input  is completed; (D) quitting reserving  mode  when  no  key  signal  is detected for a certain time and otherwise checking memory area  of EPROM (20); (E) repeating  the  step  (B)  when  empty  memory  is checked; and (F) displaying error message and quitting a reserving mode when no empty memory area is detected in the step (D).
Patent KR-930006869-B1 (KR)
Inventor: MATSUURA TADAFUMI
IPC: B60H1/00
Filed: 1988-11-22
Granted: 1993-07-24
Abstract: 내용 없음.
Patent KR-970001145-B1 (KR)
Title: Navigation aids
Inventor: HUGH JOHN AGNEW
IPC: G01C21/22
Filed: 1987-05-15
Granted: 1997-01-29
Abstract: An electronic cursor (12) is movable over a digitising table (10) on which a chart (16) has been spread. The cursor can give an indication of which way it should be moved to reach a defined position on the chart. The cursor can also convert positions in terms of x, y coordinates of the table into positions in terms of latitude and longitude co-ordinates of the chart, and can display the chart positions. The cursor can also determine bearings and distances between its own position and a defined position. Several other facilities are also available. Thus, the cursor can be used to facilitate the plotting of positions and courses on the chart and in reading off positions and bearings from the chart.
Patent KR-940011593-B1 (KR)
Inventor: MORI MIKIO
IPC: D05B1/20
Filed: 1987-10-27
Granted: 1994-12-22
Abstract: 내용 없음.
Patent KR-930007635-B1 (KR)
Inventor: OGISO TOSHIO
IPC: H02P3/04
Filed: 1989-03-30
Granted: 1993-08-14
Abstract: 내용 없음.
Patent KR-920005471-B1 (KR)
Inventor: FINLEY JAMES J
IPC: G02B1/10
Filed: 1989-03-31
Granted: 1992-07-04
Abstract: 내용 없음.
Patent KR-940007054-B1 (KR)
Inventor: ITOH SHINICHI
IPC: G03F7/26
Filed: 1989-08-09
Granted: 1994-08-04
Abstract: 내용 없음.
Patent KR-910006918-B1 (KR)
Title: Method of making margarine for pastry
Inventor: KIM JIN-YONG
IPC: A23D7/02
Filed: 1989-09-12
Granted: 1991-09-14
Abstract: A sheet-type margarine is produced by cooling a margarine  at 5 deg.C or less and solidifying it, putting it into the hopper and extruding it through the rectangula nozzle, and cutting it in  the process of the conveyance to make a fixed  size  of  a  sheet-type margarine. Pref. the margarine for the manufacture of pestry  has 5-30 mm thickness and 0.5-3.0 kg weight.
Patent KR-0140994-B1 (KR)
Title: Fastening system for disposable diaper with disposability feature
Inventor: ROESSLER THOMAS H
IPC: A61F13/15
Filed: 1989-12-19
Granted: 1998-06-15
Abstract: An absorbent article is described which comprises superposed backsheet (10), absorbent body (12) and topsheet (13) elements formed to a composite. The opposite longitudinal ends of the composite provide front and rear waistband portions (16,17) adapted to overlap each other upon encircling abdomen of the user. A primary fastening means (21,64) on the front and rear waistbands (16,17) is provided respectively, for releasably fastening the front and rear waistband portions (16,17) to each other in the encircling relationship. A separate secondary fastening means (62,63,66,67) is provided on the composite for fastening the article in a rolled or folded condition for disposal after use. The secondary fastening comprises tabs (62,63) projecting outwardly on the ends of the rear waistband (16). In order to provide a disposable article which is easy in design and easy in use, and which is able to securely seal a soiled absorbent article after use in a rolled or folded condition for disposal, it is proposed, the secondary fastening means further to comprise transverse slits (66,67) across a portion of each of the tabs (62,63). The slits (66,67) extend opposite each other in the respective tabs (62,63) whereby interengagement of the tabs (62,63) with each other at their slits (66,67) fastens the article for disposal. <IMAGE>
Patent KR-950008209-B1 (KR)
Title: Curable silicone compositions
Inventor: JACOBINE ANTHONY F
IPC: C08G75/04
Filed: 1990-02-21
Granted: 1995-07-26
Abstract: The composition curable to a solid crosslinked polyorganosiloxane comprises:   a) a norbornene functional silicone prepolymer having a plurality of groups of the formula: <CHEM> bound to silicon atoms thereof, where R is H or methyl, and R<4> is ethylene, ethenylene, propylene or propenylene, b) a coreactive silicone prepolymer having alkylthiol functionality, said polyorganosiloxanes (a) and (b) being present in an equivalent ratio between 2:1 and 1:2 norbornene to alkyl thiol groups, and c) an effective amount of a thiolene cure catalyst, respectively.
Patent KR-930002598-B1 (KR)
Title: White-noise reducer circuit of tv
Inventor: JO HYON-DUK
IPC: H04N5/21
Filed: 1990-03-21
Granted: 1993-04-03
Abstract: The circuit reduces white  noise  occurring  in  weak  signal condition to maintain the quality of television video. It includes a high-pass filter (10) for passing only high frequency  component of input  video,  a  field  pixel  difference  detector  (20)  for detecting that the number of lines in one frame exceeds a  certain number, a frame pixel differnece detector (30) for detecting  that the average value of each pixel exceeds a certain reference level, a controller (40) for generating switching control signal from the outputs of the detectors (20,30), and a switch (SW1) for selecting one of the outputs of an edge  compensator  (60)  and  a  delaying section (80).
Patent KR-930006063-B1 (KR)
Inventor: MURASHIKE YOSHINORI
IPC: F24F11/00
Filed: 1990-03-28
Granted: 1993-07-03
Abstract: 내용 없음.
Patent KR-940004103-B1 (KR)
Inventor: OSHIMA KAZUHIDE
IPC: C25D5/36
Filed: 1990-05-08
Granted: 1994-05-13
Abstract: 내용 없음.
Patent KR-940002002-B1 (KR)
Inventor: KANDA HIROYUKI
IPC: G11B5/596
Filed: 1990-07-27
Granted: 1994-03-12
Abstract: 내용 없음.
Patent KR-930011882-B1 (KR)
Inventor: MIZUMOTO TAKESHI
IPC: F02B67/06
Filed: 1990-08-01
Granted: 1993-12-22
Abstract: 내용 없음.
Patent KR-920006470-B1 (KR)
Title: Textile processing selvage cutting machine using the laser
Inventor: KIM HANG-YONG
IPC: D06H7/00
Filed: 1990-09-28
Granted: 1992-08-07
Abstract: At the laser using fabric cutting machine (1),  cutting  both end sides of the fabric cloth is accomplished by  radiating  laser beam (3) being generated  from  the  center  of  the  horizontally moving table. In this table, a top sharpened separating blade that is acting as a selvage cutter (7) and is attached to the rods  (8) next to the guide rollers (4)(4") which make the fabric cloth move smoothly, and a separator that is fixed  by  the  fixing  nut  (9) makes the selvage disposal device to  be  being  integral  to  the laser using fabric cutting machines.
Patent KR-920009598-B1 (KR)
Title: Clamping device
Inventor: SONG DAE-HYOK
IPC: F16B39/00
Filed: 1990-10-11
Granted: 1992-10-21
Abstract: The fastening element comprises a flat portion (11) formed on the end of a bolt (10), a nut (12) having a hexagonal  head  (12') and a cylindrical portion (12"), a body (13)  having  a  hexagonal groove (14), a through hole (15) and a spacing portion (16) formed with a saw tooth (17) on the periphery of the body (13),  the  nut (12) inserted in the body (13), a spring (21) elastically  mounted between a  washer  (20)  fixed  to  the  lower  of  a  cylindrical projection (15') and a cylindrical  portion  (12"),  an  inserting element (18) having the  hole  (18')  corresponding  to  the  flat portion (11) formed with a saw tooth (19).
Patent KR-920010361-B1 (KR)
Title: Method of manufacturing tungsten for impregnated cathode
Inventor: KWANG JAE-SHIK
IPC: H01J1/28
Filed: 1990-10-23
Granted: 1992-11-27
Abstract: The porous tungsten (W-bulk) is mfd.  by  mixing  90-97  wt.% tungsten powder of 2-7  μm particle  size  with  3-10  wt.%  binder composed of 10-20 wt.% polyethylene, 60-80 wt.% xylene  and  10-20 wt.% edible oil, extrusion molding the mixture,  pre-sintering  it under the reduction atmosphere at 1000-1200  deg.C,  sintering  it under the reduction atmosphere at 1800-2500 deg.C for 1-5  hr,  nd cutting it. The porous tungsten is used in the impregnated cathode for TV braun tube and laser electron tue.