baber/WOPTO huggingface dataset:
Patent KR-20020052670-A (KR)
Title: Authentication Method in Web Access Proxy Server
Inventor: KIM HYEONG NAM
IPC: H04L9/32
Filed: 2000-12-26
Abstract: PURPOSE: An authentification processing method in a data communication network including a web access proxy server(WAPS) is provided, which provides a confidentiality and a non-repudiation function as to a message transmitted together with an authentification function. CONSTITUTION: An access control protocol(30a) controls a selective access as to a client terminal(10) and contents providers(20a). And web site information as to the above contents providers are stored in a web site storing part(30b), and an authentification processing protocol(30c) performs an authentification processing as to the above contents providers. According to the authentification processing method, a digital signature generated by performing a message digest coding as to a message to be transmitted from the web access proxy server to the contents provider in response to a paid information request of the client terminal is transferred to the contents providers. Then, the contents providers receiving the digital signature decodes the coded message digest and judges whether it is a correct digital signature, and then, the paid information page is transferred to the client terminal through the above web access proxy server.
Patent KR-20020052769-A (KR)
Title: Method for saving MP3 file automatically in N-WLL terminal unit
Inventor: KIM UNG BIN
IPC: G11B20/10
Filed: 2000-12-26
Abstract: PURPOSE: A method for automatically storing MP3(MPEG(Moving Picture Experts Group) layer 3) files of an N-WLL(Narrowband-Wireless Local Loop) terminal is provided to allow the N-WLL terminal to automatically capture the MP3 files and store the MP3 files in a memory module, without using an external device such as a UART(Universal Asynchronous Receiver/Transmitter) or changing the memory module. CONSTITUTION: Whether the wireless call processing between a terminal and a base station is a data service is decided(S11). If not, voice call processing is performed(S12), and if a data service, whether a memory pool of the terminal has a margin is decided(S13). If not, data stored in the memory pool are all deleted and the step of S11 is repeated(S14), and if the memory pool has a margin, whether the received data is a frame header of an MP3 file is decided(S15). If not, general data service call processing is performed(S16) and the step of S13 is performed, and if the data correspond to a frame header of an MP3 file, a frame length check and a CRC(Cyclic Redundancy Check) are performed(S17). Whether frame length is checked is decided(S18). If not, the step of S16 is performed, and if checked, whether a result value of the CRC is coincident with the frame length is decided(S19). If not, the step of S16 is performed, and if coincident, the MP3 file is regarded as correct and stored in a memory module, namely, the memory pool of the terminal(S20).
Patent KR-20020056520-A (KR)
Title: An exhaust manifold structure of engine
Inventor: KIM HAN SANG
IPC: F01N13/06
Filed: 2000-12-29
Abstract: PURPOSE: A structure of an exhaust manifold is provided to efficiently purify exhaust gas in initial starting of an engine by shortening the light-off time of a catalyst and quickly performing the purifying operation of a catalytic converter. CONSTITUTION: In an exhaust manifold(10) of a four-cylinder engine, a first and second runners(11,12) and a third and fourth runners(13,14) are firstly joined respectively. The joined runners forms a common join part(15), and the common join part(15) is connected to an exhaust pipe.
Patent KR-20020056667-A (KR)
Inventor: KIM DO U
IPC: H01L29/786
Filed: 2000-12-29
Abstract: PURPOSE: A method for fabricating a semiconductor device is provided to prevent a characteristic of the semiconductor device from being deteriorated and to improve reliability, by performing a metal interconnection contact process while a poly 2 layer having a stack layer composed of a polysilicon layer and a tungsten silicide layer is used as a buffer layer. CONSTITUTION: The poly 2 layer having a stack structure composed of the polysilicon layer(31) and the tungsten silicide layer(33) is patterned on a semiconductor substrate. The first interlayer dielectric is formed on the resultant structure including the poly 2 layer. A predetermined portion of the first interlayer dielectric is etched to expose the poly 2 layer in a poly 4 contact region. Poly 4 connected to the poly 2 layer is formed on the resultant structure. The second interlayer dielectric is formed to planarize the resultant structure. The second interlayer dielectric, the poly 4 and the tungsten silicide layer are etched to form a metal interconnection contact hole. A contact plug(43) filling the contact hole is formed. A metal interconnection(45) coupled to the contact plug is formed.
Patent KR-20010021827-A (KR)
Title: 광기록 매체 및 그 제조방법
IPC: G11B7/249
Filed: 1998-07-13
Abstract: 기판위에 레이저광에 의한 정보의 기입 및/또는 독취가 가능한 기록층이 형성된 광기록 매체로서, 디스크 전체면에 걸쳐 적정한 트래킹 에러 신호가 확보되며 정보의 고밀도화에도 대응할 수 있는 추기(追記) 가능한 광기록 매체를 제공한다. 그러한 광기록 매체는 감량개시 온도 혹은 분해온도가 300 ∼ 500℃의 범위내에 있는 함금속 아조계 화합물을 함유한 기록층 구성재료를 기판위에 증착시켜 기록층을 형성함으로써 얻어진다.
Patent KR-20010030885-A (KR)
Title: Novel nucleoside or nucleotide fluorescent conjugates, preparation method and uses
IPC: C07H19/20
Filed: 1998-10-02
Abstract: The invention relates to novel fluorescent conjugates of nucleosides or nucleotides which can be used especially for detecting, locating and/or isolating nucleic acids or molecules of biological or clinical interest which have a nucleoside structure or are capable of interacting with nucleic acids. The invention further relates to the polynucleotides comprising at least one fluorescent conjugate of a nucleotide.
Patent KR-20010033075-A (KR)
Title: 플라즈마 붕화 처리 방법 및 장치
IPC: C23C8/08
Filed: 1998-12-11
Abstract: 본 발명은 붕소 분배제를 함유한 가스 매체를 반응기(10)에 공급하여 그 반응기(10) 중에서 글로 방전을 일으키는 형식으로 플라즈마 붕화 처리에 의해 표면 상에 붕화물 층을 생성하는 방법 및 그 장치에 관한 것이다.  예컨대 금속 표면을 그 대상으로 하는 공지의 플라즈마 붕화 처리 방법은 다공이 없는 붕화물 층을 유도하지 못하여 공업적 대량 생산 용도에 적합하지 않다는 단점을 수반한다.  본 발명에 따른 방법은 반응기(10)의 처리실(11) 중에 발생되는 플라즈마의 생성 파라미터를 플라즈마 중에 높은 비율의 여기 붕소 입자가 얻어지도록 선택해야 한다는 인식을 기초로 하고 있다.  그와 같이 함으로써 다공이 없는 붕화물 층이 유도된다.  본 발명에 따른 방법은 예컨대 기어, 캠축 등과 같이 높은 응력에 노출됨으로 인해 내마모성이 높은 표면을 구비해야 하는 부품을 코팅하는데 적합하다.  붕화물 층의 생성에 영향을 미칠 수 있는 방법 파라미터는 예컨대 전압, 펄스 점유율, 주파수, 온도, 플라즈마 생성 시의 압력 및 반응기(10)에 공급되는 가스 매체의 붕소 분배제와 잔여 성분의 함량일 수 있다.
Patent KR-20010033440-A (KR)
Title: 적층포장재료 및 그 제조방법
IPC: B32B27/08
Filed: 1998-12-25
Abstract: 본 발명은 표면층, 표면층에 인접하는 중간층, 및 다른 표면층인 적어도 3층의 고분자재료로 이루어지는 적층포장재료에 있어서, 표면층에 인접하는 중간층에 윤활제를 포함하고, 중간층의 적어도 하나는 가스차단성을 가지는 층이며, 양 표면층에 첨가하는 윤활제의 총량이 그것에 인접하는 중간층에 첨가하는 윤활제의 총량보다 적은 것을 특징으로 하고, 제조시에는 다이 립에 대한 윤활제의 부착이 감소되어 우수한 투명성 및 광택을 가지는 적층포장재료를 제공한다.
Patent KR-20010034049-A (KR)
Title: 고주파수 초음파 프로브를 사용하여 사람 또는 동물에서유래된 조직을 조사하고 표시하는 방법
IPC: A61B8/10
Filed: 1999-01-12
Abstract: 본 발명은 특히 컴퓨터에 의해 제어되는 3차원 위치결정 시스템 (2)에 의해 조종되는 헤드에 의해 지지되는 초음파 프로브 (1)을 조직 구조에 대해 수직으로 위치시키고; 소정의 조직 구조 영역에 초점 정합되는 수렴성 고주파수 초음파 빔(약 50MHz)을 20 내지 30mm의 수직 침투 거리에 걸쳐 발생시키도록, 프로브를 제어하고; 조직 구조를 컴퓨터 (3)-제어된 위치결정 시스템 (2)에 의해 스캐닝하는 동시에 컴퓨터 (3)으로 조직 구조에 반영된 시그널을 수득하고; 다양한 시그널 처리 작업을 스캐닝으로부터 도출된 데이터를 바탕으로 수행하여, 정보의 재현성을 개선하고 시행자에 의한 이의 이해를 촉진시키는 것으로 이루어진, 사람 또는 동물에서 유래된 조직의 조사 및 표시 방법에 관한 것이다.
Patent KR-20010040642-A (KR)
IPC: H04N7/088
Filed: 1999-11-23
Abstract: 텔레비젼 신호와 다중화된 텔레텍스트와 같은 데이터를 수신하는 텔레비젼 수상기는 적어도 선택된 데이터 신호 페이지를 획득하기 위한 데이터 획득 회로(16)와 복수의 페이지를 저장하기 위한 메모리(13)를 포함한다.  비휘발성 메모리(11)는 복수의 채널들 각각에 대해 사용자의 선호 페이지 리스트를 유지하며, 마이크로프로세서(7)는 수상기를 각 채널에 차례로 동조시켜 모든 채널들에 대한 선호 페이지를 획득해서 메모리(13)에 저장한다.  마이크로프로세서(7)는 스위치 온시에 수상기를 차례로 각 채널에 동조시켜서 그 채널에 대한 선호 페이지를 획득한다.  수상기는 설정 시간을 허용하거나 선호 페이지의 수신을 모니터링함으로써 선호 페이지를 획득하기에 충분히 긴 기간동안 차례로 각 채널에 동조된다.  대안적으로, 제 2 튜너는 비시청 채널을 스캔하는데 사용된다.
Patent KR-20010041025-A (KR)
Title: 반도체 장치를 제조하는 방법
IPC: H01L27/115
Filed: 1999-12-01
Abstract: 반도체 본체의 표면에 전계 효과 트랜지스터와 비휘발성 메모리 소자를 포함하는 장치를 제조하는 방법에서, 제 1 도전 타입의 제 1 및 2 활성 영역(4,5)은 트랜지스터와 메모리 소자에 대하여 각기 반도체 몸체의 표면에서 규정된다. 상기 반도체 몸체의 상기 표면은 연속적으로 위 트랜지스터의 희생 게이트 유전체와 위 메모리 소자의 플로팅 게이트 유전체(13)를 제공하는 제 1 절연층으로 덮여지며, 제 1 절연층은 다음에 상기 트랜지스터의 희생 게이트와 상기 메모리 소자의 플로팅 게이트 실리콘 함유층에 의해서 덮여진다. 상기 희생 게이트와 상기 플로팅게이트의 형성후에, 상기 트랜지스터와 상기 메모리 소자에는 제 2의 도전형 형태의 소스와 드레인 영역이 제공된다. 다음 단계에서, 유전층(18)이 도포되며, 위 제 1 및 2 활성 영역(4,5)에서의 실리콘 함유층이 노출될때까지 물질 제거 처리에 의해서 두께의 적어도 일부분에 대하여 제거되며, 그 후에 상기 제 1 활성 영역(4)에서의 상기 실리콘 함유층과 상기 제 1 절연층이 제거되며, 이로 인하여 유전층(18)에 리세스가 형성된다. 이어서 메모리 소자의 게이트간 유전체를 제공하는 상기 제 2 활성 영역(5)에 제 2 절연층이 도포되며, 상기 트랜지스터의 게이트 유전체(23)를 제공하는 제 1 활성 영역(4)에 제 3 절연층이 도포된다. 상기 게이트 유전체(23)와 상기 게이트간 유전체(24)의 형성후에, 상기 제 1 활성 영역(4)에서 위 트랜지스터의 게이트(26)로서, 제 2 활성 영역(5)에서 상기 메모리 소자의 제어 게이트(27)로서 성형되는 도전층이 도포된다.
Patent KR-20010071329-A (KR)
Title: 폴리아미드- 및 퍼플루오로알킬 물질로 된 콤파운드 및이들 콤파운드와 추가 중합체 물질과의 혼합물, 그것들의제조 방법 및 이용
IPC: C08L77/06
Filed: 1999-05-14
Abstract: 본 발명은, 폴리아미드- 및 퍼플루오로알킬 물질(들)로 구성되어 있고 예컨대 콤팩트 물질로서 사용될 수 있는 콤파운드 및 이들 콤파운드와 추가 중합 물질(들)과의 혼합물에 관한 것이다. 본 발명은 또한 지방족 및/또는 부분 방향족 호모- 및/또는 공 폴리아미드 및/또는 폴리에스테르 아미드 및/또는 폴리에테르 아미드 및/또는 폴리에스테르에테르 아미드 및/또는 폴리이디드아미드 및/또는 폴리아미드아민 및/또는 이들 폴리아미드 화합물과 추가의 중합체와의 혼합물 그리고 변형된 퍼플루오로알킬 물질(들)을 일단 또는 다단으로 혼합하고 그때에 또는 거기에 이어서 반응적으로 전환시키는 상기 콤파운드의 제조 방법에도 관한 것이다. 본 발명의 목적은 폴리아미드 용융물 중에 있어 퍼플루오로알킬 물질의 균질 혼화성을 개선하는 것이다.
Patent KR-20010053150-A (KR)
Title: 덮개 요소를 구비한 휴대용 가방
IPC: B65D33/16
Filed: 1999-01-06
Abstract: 본 발명의 선물 패키지는 전방벽, 후방벽 및 측벽의 상부 모서리(37, 38, 39)들에 의해 형성된 개구를 갖는 용기를 형성하도록 전개 상태 및 접힘 상태를 갖고 가방 개구의 영역은 가방이 접힘 상태에 있을 때보다 전개 상태에 있을 때 더 크도록 평행한 전방벽 및 후방벽을 갖는 가방(30)을 포함한다.  선물 가방은 길이 및 폭을 갖고 해제 상태 및 압축 상태를 갖는 탄성 부재를 포함하고, 압축 상태에서는 해제 상태에서보다 길이 및 폭 중에서 적어도 하나에서 더 작고, 압축 상태로부터 해제 상태로 이동됨에 따라 가방의 개구를 가방의 팽창 상태로 되게 하는 가방 토퍼(10)를 더 포함한다.
Patent KR-20010043997-A (KR)
Title: 셀룰러 통신 시스템에서의 가입자 유효 확인 방법
IPC: H04W8/22
Filed: 1999-06-18
Abstract: AMPS 네트워크 및 GSM 네트워크로 이루어진 듀얼모드 통신 시스템이 대응하는 SIM 카드들을 갖춘 듀얼모드 단말기들과의 통신을 제공한다.  이동 단말기들은 단말기 기반 ESN을 저장하고, SIM 카드는 SIM 기반 ESN 및 MIN을 저장한다.  듀얼모드 시스템은 AMPS 네트워크에서의 등록을 위해 단말기 기반 ESN 및 MIN을 이용한다.  그러나, 인증을 위해서는, 듀얼모드 시스템은 AMPS 네트워크에서의 키 기반 인증을 위해 SIM 기반 ESN을 이용한다.
Patent KR-20010044213-A (KR)
Inventor: KIM SANG JUN
IPC: H04M15/00
Filed: 2001-01-11
Abstract: PURPOSE: A method for settling billing using the caller ID information of a mobile terminal and a system therefor are provided to increase security and authenticity by using the password and caller ID of a mobile terminal when the user purchases goods through Internet. CONSTITUTION: A billing settlement system consists of a user network(1), a seller network(2), a settlement system(3), and a subscriber access management server(4). The user network(1) is composed of a mobile phone(11) and a terminal(12) such as a personal computer or a portable terminal. The seller network(2) is composed of a web site(21) operated and managed by a computer system(22). The settlement system(3), connected with the seller network(2), compares and processes caller ID information through a control part(35), allows access to the mobile phone(11) and provides voice announcement. The subscriber access management server(4) is composed of a caller ID information system(41) and an adjustment system(42). The caller ID information system(41), connected to the settlement system(3), calls out a telephone number and transmits a telephone signal to the mobile phone(11). The adjustment system(42) receives a billing settlement result processed by the settlement system(3), imposes the telephone charge on the telephone number of the mobile phone(11) and outputs its result.
Patent KR-20020061449-A (KR)
Inventor: KIM KWON JUNG
Filed: 2001-01-16
Abstract: PURPOSE: A system for issuing a lottery gift coupon and a method thereof are provided to supply a free gift through a lottery to a gift coupon buyer by designating a wanted lottery number in a predetermined number section in a lottery number managing server of a homepage through a communication such as the Internet. CONSTITUTION: A gift coupon buyer connects to a gift coupon issuing system and designates a designed gift coupon model(s200). The buyer inputs a logo and a memorial sentence on a gift coupon(s300). The buyer inputs a nominal price and an amount of the gift coupon(s500). The buyer designates a lottery number of the gift coupon(s600). The buyer pays a purchase price of the gift coupon(s800). The gift coupon issuing system transmits information of the gift coupon ordered by the buyer to a printing system for printing the gift coupon. The buyer draws a designated lottery number through a computer. A drawn gift is delivered(s1000-2).
Patent KR-20010074536-A (KR)
Inventor: INABA TAKEHITO
IPC: H05K1/02
Filed: 2001-01-22
Abstract: PURPOSE: To reduce the cost and meet the recent miniaturization and thinning requirement of circuit boards. CONSTITUTION: The circuit board has a base member 2 having a wiring layer 3 partly exposed to the outside and an insulation layer 5 covering other parts of the wiring layer 3 then the exposed parts to the outside, a floating conductor layer 4 is formed in the insulation layer 5 of the base member 2 so as to fill spaces expanding through specified gaps in a direction perpendicular to the layer thickness, and the floating conductor layer 4 and the wiring layer 3 are mutually parallel disposed on the same plane.
Patent KR-20020064103-A (KR)
Title: Optical Source in Liquid Crystal Projector
Inventor: KANG HO JUNG
IPC: G03B21/20
Filed: 2001-02-01
Abstract: PURPOSE: An optical source in liquid crystal projector is provided to minimize optical loss by reflecting the beams toward the parabolic reflector through the use of the reflecting surface formed at the discharge lamp tube. CONSTITUTION: An optical source comprises lamp(12) for generating a beam; a parabolic reflector mirror(14) for fully reflecting the beam generated from the lamp, in such a manner that the beam advances in one direction; and a reflecting surface(16) partially formed at the lamp, and which reflects the beams advancing in the direction deviating from the parabolic reflector mirror, toward the parabolic reflector mirror. The lamp includes a discharge lamp tube for emitting light, and a lead portion having an electrode for applying voltage to the discharge lamp tube.
Patent KR-20020064439-A (KR)
Title: Specific function service method for multimedia device
Inventor: LIM SANG UK
IPC: H04N5/44
Filed: 2001-02-01
Abstract: PURPOSE: A method of servicing specific functions of a multifunction media apparatus is provided to automatically perform specific functions such as virus checking/curing/application program updating periodically, thereby maintaining a system capacity in an optimum state. CONSTITUTION: A control module makes out information on a user's watching records. The control module searches a minimum using time in reference to the information. The control module decides the searched minimum using time as a time zone for performing specific functions. The control module performs the specific functions at the decided time zone. The control module downloads a corresponding application program from a specific site to perform the specific functions. The specific functions are carried out daily/weekly/monthly. The specific functions check and cure a computer virus, and update the application program.
Patent KR-20010035437-A (KR)
Inventor: AHN JONG HUN
IPC: A23L11/00
Filed: 2001-02-14
Abstract: PURPOSE: Provided is a method for preparation of bean-curd using Salicornia herbacea juice instead of a general coagulant. The bean-curd using Salicornia herbacea juice has unique color, taste and functionality peculiar to Salicornia herbacea. CONSTITUTION: A method for preparation of bean-curd using Salicornia herbacea juice comprises the following steps of: (a) washing soy beans and grinding them; (b) heating then filtering them to obtain soybean oil; (c) adding Salicornia herbacea juice thereto then stirring and heating them to obtain coagulated soybean protein; and (d) pressing the resultant in a mold having certain form.
Patent KR-20010085593-A (KR)
Title: Automatic ticket gate apparatus
Inventor: KOBAYASHI TAKASHI
IPC: G07B15/00
Filed: 2001-02-26
Abstract: PURPOSE: To provide an automatic ticket examination machine which has the significantly reduced installation space and also has the user-friendliness. CONSTITUTION: This machine is provided with a casing 10 which is placed between the 1st and 2nd paths and also prescribes these two paths, a 1st communication plane 26a, i.e., a plane placed on the casing 10, having a 1st communication part 16a and tilted toward the 1st path side with respect to the horizontal plane, a 1st ticket examination means 10a which carries out the ticket examination processing according to the result of communication that is carried out with a radio ticket via the 1st communication part 16a, a 2nd communication plane 26b being a plane placed on the casing 10, having a 2nd communication part 16b and tilted toward the 2nd path side with respect to the horizontal plane, and a 2nd ticket examination means 10b which carries out the ticket examination processing according to the result of communication that is carried out with the radio ticket via the 2nd communication part 16b.
Patent KR-20010093648-A (KR)
Title: Apparatus for driving rotatable mop of vacuum cleaner and employing the same
Inventor: LEE BYEONG JO
IPC: A47L9/04
Filed: 2001-02-27
Abstract: PURPOSE: A rotary mop driving device for a vacuum cleaner is provided to improve structure and to wipe a floor with a damp cloth by rotatably installing an additional mop. CONSTITUTION: A device for driving a rotary mop in a vacuum cleaner comprises a suction port assemblage(10) rotatably mounted on a lower end of a suction port body(12); a solid of revolution(30) supporting a mop; a driving switch(6) turning on/off the rotary mop driving device; a rotation driving unit(50) supplying driving force to rotate the solid of revolution; and a power supply unit(20) supplying an electric signal into the rotation driving unit according to the manipulation of the driving switch. The power supply unit is approached to the suction port assemblage. Moreover, the power supply unit arranges an additional space formed by a protect cover(18) to isolate from an air passage containing a suction port(16) on a connect pipe(7). The rotation-driving unit is composed of a rotation motor having a pair of rotation shafts and a power-transmitting unit(40) connected to both rotation shafts of the rotation motor.
Patent KR-20010044497-A (KR)
Inventor: PARK CHUN GYOU
IPC: H04B1/00
Filed: 2001-02-28
Abstract: PURPOSE: A microphone transceiver consuming low power is provided to lighten the device, to prolong the battery life, to save power consumption, and to use the device both for single channel and phase locked-in loop modes. CONSTITUTION: In a control flow of transmission of a microphone transceiver consuming low power, a voice amplifier(12) amplifies the voice put in through a wireless microphone for transmission(5). An RF controller(18) condenses the voice signal receiving from the voice amplifier(12), modulates the condensed voice signal, change the latitude of the modulated signal, compares the latitude-changed signal with a reference data, and determines the carrier frequency of the modulated signal. A transmitter(22) amplifies the signal from the RF controller(18) to make a signal of high frequency. A 1.5V battery(10) supplies power to the device.
Patent KR-20010087248-A (KR)
Title: Method for producing organic insulating film
Inventor: YOSHIDA YUJI
IPC: C08J5/18
Filed: 2001-02-28
Abstract: PURPOSE: To provide a method of stably forming an organic insulating film having low dielectric constant on a substrate. CONSTITUTION: This method of forming the organic insulating film is performed by applying a solution, in which an organic resin having a structure expressed by formula 1 is dissolved, on the substrate and exposing the substrate under an atmosphere of >= 200deg.C and > 0.1 atm oxygen partial pressure. In the formula, each of R1-R8 is independently selected from a group composed of hydrogen, fluorine, chlorine, bromine, iodine, a 1-10C alkyl, a 2-10C functional group having a double bond, a 2-10C functional group having a triple bond, methoxy, ethoxy, and propoxy.
Patent KR-20020071051-A (KR)
Title: Method of preparation 4,4'-biphenol
Inventor: JUNG DEOK SEOK
IPC: C07C37/50
Filed: 2001-03-02
Abstract: PURPOSE: A preparation method of 4,4'-biphenol is provided to obtain uncolored and highly pure 4,4'-biphenol represented by the formula 1 which is used as a material for producing a heat resistant resin or an aromatic liquid crystal polyester resin at a low temperature economically and in high yield. CONSTITUTION: The method comprises the step of dealkylating 3,3',5,5'-tetraalkyl-4,4'-biphenol represented by the formula 2 in an organic solvent in the presence of an acid catalyst, wherein the organic solvent is a phenol compound having at least one alkyl group, and the dealkylation is carried out under the reduced pressure to boil the organic solvent slowly at the end of the reaction. In the formula 2, R is a linear or branched alkyl group of C3-C8. Preferably the organic solvent comprises 55-90 wt% of monoalkylphenols. The dealkylation is carried out at 170-220 deg.C, and preferably the pressure at the end of the reaction is reduced to 90-20 kPa. The acid catalyst is at least one selected from the groups consisting of sulfuric acid, acidic white clay, heteropolyacids, sulfonic acids and cationic exchange resins.
Patent KR-20010044520-A (KR)
Inventor: LEE CHUNG JONG
IPC: G06F17/00
Filed: 2001-03-03
Abstract: PURPOSE: A method for interworking a teacher and a student through the network is provided to enable a teacher, a student and parents of students to easily exchange their views with one another through the network and to keep close touch with one another by supporting a construction of a homepage, and by providing a correspondence column to the home page. CONSTITUTION: A teacher and a student access to an interworking server using a terminal. After that, the teacher and the student input personal information and school information. The interworking server stores the information in a personal information database(S100). The interworking server gives an ID and a password to the teacher and the student. The teacher and the student are registered as members(S200). In case that the member registered selects a homepage manufacturing, the interworking server supports tools for the homepage manufacturing. The member manufactures a homepage using the tools(S300). The interworking server inserts a corresponding column into the home page. The column is stored in a homepage database(S400). The interworking server transmits a message inputted or data to another home page linked through the corresponding column(S500).
Patent KR-20010091945-A (KR)
Title: Thermally actuated switch
Inventor: OKITA MASAO
IPC: H01H37/04
Filed: 2001-03-09
Abstract: PURPOSE: To provide structure of a heat sensitive switch using a piece of bimetal capable of easily positioning the piece of bimetal on a stationary terminal and preventing deformation of the piece of bimetal on setting it into a housing. CONSTITUTION: The switch comprises a housing 1, a stationary contact 3 settled on the inner surface of the bottom of the housing 1, a piece of bimetal 5 having a bending part 5a bendable according to the temperature, to one end of which a movable contact 6 is fixed so as to contact and part from the stationary contact 3, and a stationary terminal 4 to which the other end of the piece of bimetal 5 is fixed in cantilever shape. An extension arm 5b which extends from the fixing part of the stationary terminal 4 in the opposite side of the position of the bending part 5a is formed on the piece of bimetal 5. A coupling holding part 1b which is positioned on the housing 1 by engagement with the extension arm 5b is formed.