baber/WOPTO huggingface dataset:
Patent JP-2004185833-A (JP)
Title: Key top body with film plate
Inventor: OKAMURA TATSUYA
IPC: H01H13/70
Filed: 2002-11-29
Abstract: <P>PROBLEM TO BE SOLVED: To provide a key top body with a film plate contriving miniaturization and having a structure, in which an operation of any key top is hardly interfered by surrounding key tops thereof.  <P>SOLUTION: A key top body with a film plate 1 has a structure in which a plurality of key tops 10-1 to 10-5 (a center key top 10-1 and outer periphery key tops 10-2 to 5) are formed by molding a plurality of key top bodies 30 on a film plate 20. The key tops 10-1 to 10-5 are coupled with coupling portions 25, 27 (outer periphery portions 25 and center coupling portions 27) composed of the film plate 20. The outer peripheries 10-2 to 10-5 are coupled with the outer periphery coupling portions 25. Positioning holes 29 to position the key top body 1 at branch portions of the coupling potions 25, 27 are disposed.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004181686-A (JP)
Title: Recorder, carriage, and liquid ejector
Inventor: ISHIHARA KENJIRO
IPC: B41J2/18
Filed: 2002-11-29
Abstract: <P>PROBLEM TO BE SOLVED: To provide a carriage in which diffusion of ink mist to the surroundings is suppressed except the surface side of a carriage opposite to a recording medium by stopping the ink mist at the opposite surface side, and to provide a recorder or a liquid ejector comprising that carriage.  <P>SOLUTION: The recorder comprises a carriage 61 arranged in a reciprocating manner in the main scanning direction, and a recording head 62 provided on the surface 63 of the carriage 61 opposite to a recording medium and performs recording by ejecting ink L from the recording head 62 toward the recording medium. The carriage 61 comprises a means 66 for stopping ink mist being generated when the ink L is ejected from the recording head 62 at the opposite surface 63 side and controlling diffusion of ink mist from the opposite surface 63 side to the surroundings other than the opposite surface 63 side.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004185700-A (JP)
Title: Film having polycrystal structure and magnetic recording medium, and magnetic storage device
Inventor: SATO KENJI
IPC: G11B5/84
Filed: 2002-12-02
Abstract: <P>PROBLEM TO BE SOLVED: To provide a film having polycrystal structure in which the anisotropy of a crystal layer is increased with structure different from that in a conventional product.  <P>SOLUTION: A film (32) having polycrystal structure has a seed layer (36) which overspreads along the surface of a substrate (31). A multilayered crystal layer (37) overspreads on the surface of the seed layer (36). The seed layer (36) has crystal grains which grow up in a vertical direction orthogonal to the surface of the substrate (31). A normal N orthogonal to the prescribed crystal lattice plane of the crystal grain is inclined from the vertical direction V. The property of the crystal layer is controllable by the function of the seed layer (36). That is, the anisotropy of the crystal layer is increased even when texture structure is not established on the surface of the substrate (31).  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004180916-A (JP)
Title: Control system for game hall
Inventor: HAMASHIMA KIYOSHI
IPC: B42D15/10
Filed: 2002-12-03
Abstract: <P>PROBLEM TO BE SOLVED: To securely appeal for acquiring a member by accurately grasping a rate occupied by members registered to the side of a game machine among visiting players.  <P>SOLUTION: At a store doorway, a visiting and leaving sensor 7 capable of detecting a visiting person and a leaving person and a tag sensor 8 for reading stored information in a non-contacting ID tag incorporated in a member card possessed by the visiting/leaving person are arranged. Based on output from the visiting and leaving sensor 7 and the tag sensor 8, a host computer 5 calculates the number of visitors to the whole game saloon, the number of leaving persons, the number of staying persons, the number of visitors, the number of leaving members, the number of staying members, the ratio of visiting members, the ratio of leaving members, and the ratio of staying members in real time, and outputs the result of calculation as real time information document.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004187530-A (JP)
Title: Cell visualizing cell division, method for preparing the same, method for detecting fluorescence, method for evaluating effect on cell division and method for screening
Inventor: SUGIMOTO KENJI
IPC: G01N33/15
Filed: 2002-12-09
Abstract: <P>PROBLEM TO BE SOLVED: To provide a cell visualizing cell division designed to visualize the cell division and a method for preparing the cell by transferring fluorescent proteins into the cell, and to provide a method for visualizing the cell division, a method for evaluating effects on the cell division and a method for screening using the same.  <P>SOLUTION: (1) Genes of proteins constituting a cell structure reflecting the conditions of the cell division and genes of fluorescent proteins are fused to provide fusion genes. (2) The resultant three or more types of fusion genes in which the types of the fluorescent proteins are different are then transferred into a host cell to thereby afford the cell visualizing the cell division. (3) The fluorescent proteins are subsequently expressed to detect the fluorescence derived from the fluorescent proteins with time during the cell division of the cell visualizing the cell division. Thereby, the cell division is visualized to observe the conditions of the cell division. A test substance, together with the cell visualizing the cell division, can be cultured to thereby select the test substance affecting the cell division.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004192919-A (JP)
Title: Fuel cell system
Inventor: NISHIYAMA KATSUHIKO
IPC: H01M8/00
Filed: 2002-12-10
Abstract: <P>PROBLEM TO BE SOLVED: To provide a fuel gas leakage detection technique for a fuel cell system suitable for a vehicular on-board generator.  <P>SOLUTION: In stopping this system, a gas pressure value of a piping system of the fuel cell is previously stored in a nonvolatile memory. When the system is started, the present gas pressure value of the piping system is detected, and compared with the gas pressure value stored in the nonvolatile memory to obtain a pressure drop rate. When the pressure drop rate is smaller than a threshold value corresponding to the elapsed time during the system stop, it is determined to be fuel gas leakage.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004192928-A (JP)
Title: Card connector
Inventor: TAMURA NOBUHIRO
IPC: G06K17/00
Filed: 2002-12-11
Abstract: <P>PROBLEM TO BE SOLVED: To provide a card connector for increasing the flexibility of a circuit design by making a device compact.  <P>SOLUTION: This card connector 1 has a base 2 made of synthetic resin and a plurality of contact piece members 4 inserted and formed together with the base 2 and fixed to the base 2 by a prescribed arrangement. Each of the members 4 is integrally provided with electrode contact portions 6a corresponding to a surface electrode on a card side, electrode contact portions 6b corresponding to a surface electrode on a substrate side, and terminal portions 5 for connecting to be soldered on a substrate. The electrode contact parts 6a, 6b are formed in S shape. Each of the members 4 is elastically deformed when the electrode contact parts 6a are pressed by the surface electrode on the card side and the electrode contacts 6b are contacted with the surface electrode of the substrate.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004196093-A (JP)
Title: Manufacturing device and manufacturing method
Inventor: KOKUBU HIDEO
IPC: B62D65/00
Filed: 2002-12-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide a manufacturing technology free of deformation in a horizontal lateral direction being generated during reverse rotation of a frame.  <P>SOLUTION: A manufacturing device is provided with a holding mechanism (a chuck) 54 holding an object (e.g. the frame for an automobile) 40, a raising mechanism (a hoist and a girder) 2 raising the object 40, a rotating mechanism 56 rotating the holding mechanism 54 (together with the held object) by a half rotation, and a deformation preventing mechanism 60 applying force to the object 40 to cancel the force of gravity of the object 40.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004196180-A (JP)
Title: Duct for vehicle
Inventor: TANGE KATSUHIRO
IPC: B60H1/00
Filed: 2002-12-19
Abstract: <P>PROBLEM TO BE SOLVED: To reduce air resistance and pressure loss by an increase in streamlining effect and also reduce engine noise.  <P>SOLUTION: A supporting part 52 of a specified width is formed over the generally lateral center portion of a curved portion 32A facing an air inlet 38 and over a boundary portion between the curved portion 32A facing the air inlet 38 and a generally linear portion 32B. Thus, a first air flow passage 60 and a second air flow passage 62 having different overall lengths are formed on both sides of the supporting part 52. The first air flow passage 60 and the second air flow passage 62 comprises a narrowest part 66 where the cross sectional area is minimized at the middle portion of the supporting part 52 along the longitudinal direction and are formed of a cross section reduced district A1 positioned on the upstream side of the narrowest part 66 and a cross section increased district A2 positioned on the downstream side of the narrowest part 66.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004200564-A (JP)
Title: Caster with arm and instrument cabinet using the same
Inventor: OURA NORIHIRO
IPC: H05K7/18
Filed: 2002-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a caster with an arm and an instrument cabinet using the caster which moves safely the cabinet of an electronic apparatus or the like and facilitate placement in a constant area.  <P>SOLUTION: The caster 1 with the arm, levelers 8 and support fixtures 9 are fixed at four corners of a bottom plate 7 of the cabinet 6 of the electronic apparatus by screwing in pair. When the cabinet 6 is moved, an end portion recess 5 of the arm 3 is engaged with the sole plate 7 of the cabinet 6 by using the support fixtures 9, and the pivoting of the arm 3 is controlled. The tip of the arm 3 is made to protrude in such a manner that the caster 2 is positioned outside the cabinet 6. By adjusting the height of the levelers 8, the caster is 2 is grounded. When the cabinet 6 is installed, the caster 2 is floated from the placement surface by lowering and grounding the levelers 8. The engagement of the end portion recess 5 is solved by loosening the supporting fixture 9. The caster 1 with arm is rotated in the arrow mark direction and accommodated in the bottom surface side of the cabinet 6. Thereby the cabinet 6 can be installed stably in a the constant area.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004196219-A (JP)
Title: Outer mirror
Inventor: UNNO NORIYUKI
IPC: B60R1/06
Filed: 2002-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide an outer mirror that has a constitution for removing water drop adhered to a side window, does not decrease strength of a mirror base, is not restricted in design, and can be applied to a popular vehicle.  <P>SOLUTION: The outer mirror comprises a mirror base 10 projected from the side surface of a car body A of the automobile toward its side part, a mirror housing 20 having a mirror 23b for visually recognizing the back part and suspended by the mirror base 10 with a clearance S between it and the car body A, and a spoiler 30 for removing the water drop adhered to the side window SW.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004196755-A (JP)
Title: Anthracene compound having 2-hydroxyalkoxy group and method for producing the same
Inventor: HONDA HIROYUKI
IPC: C07C41/03
Filed: 2002-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a new anthracene compound which is useable for reflection preventing films and excellent in resistance to sublimation.  <P>SOLUTION: There are provided a 9,10-di(2-hydroxypropoxy)anthracene compound or the like as the new anthracene compound having 2-hydroxyalkoxy group; and also a method for reacting an anthracene polyol with an alkylene oxide in the presence of an alkaline compound as a method for producing the above compound. The anthracene compound has a remarkably low sublimation property and lower sublimation property in baking, compared with anthracene methanol which is a light-absorbing compound which has been used hitherto in the composition for reflection-preventing films, and is useful as a light absorbing agent in a composition for reflection-preventing films.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004207858-A (JP)
Title: Method for making threshold matrix, medium recording threshold matrix and image forming apparatus
Inventor: SUGIZAKI MAKOTO
IPC: B41J2/52
Filed: 2002-12-24
Abstract: <P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in a simple configuration, in which a threshold matrix corresponding to the desired output resolution can be made easily and a highly precise halftone image can be formed easily using that threshold matrix while reducing the running cost.  <P>SOLUTION: After the output resolution of a print resolution threshold matrix is converted into a print resolution (step S2), a solid image test pattern is outputted and the density is measured (steps S3 and S4), dot area rate is increased by the threshold data added to the print resolution threshold matrix such that a target density is attained (step S7) and then, based on an increased dot area rate when a desired density is attained (step S11), a desired print resolution threshold matrix is made (step S12).  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004206264-A (JP)
Title: Coin processing machine
Inventor: EMORI YUTAKA
IPC: G07D1/00
Filed: 2002-12-24
Abstract: <P>PROBLEM TO BE SOLVED: To provide a coin processing machine capable of improving the selection accuracy of denominations.  <P>SOLUTION: The coin processing machine is provided with: a carrying means 43 for moving a coin on a coin guide passage 42; a discrimination means 54 for discriminating the coin on the coin guide passage 42; denomination selection means 55, 78 for selecting the denomination of the coin on the coin guide passage 42 on the basis of the discrimination results of the discrimination means 54; and coin storage parts 58a-58f by denominations which are arranged in series to store coins selected by the money sort selection means 55, 78. The coin processing machine is also provided with a connecting straight part 50 for mutually connecting straight parts 48, 49 neighboring to two or more straight parts along the same direction as the coin guide passage 42 on the same side of the extending directions of the straight parts 48, 49 and the money sort selection means 55, 78 are arranged across the two or more straight parts.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004205873-A (JP)
Title: Screen texture
Inventor: TANIKAZE SHIRO
IPC: G03B21/60
Filed: 2002-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide screen texture which enables superior measures against environment in use and environmental contamination in burning after use, is nearly free of formation of interference fringes, and makes a picture sharp and easy to see.  <P>SOLUTION: The screen texture A on which a picture is projected is made of light-shielding stain woven cloth 12 using polyester yarns 11, which are made flameproof and impregnated with titanium dioxide. When the picture is projected, light is not blocked and no interference fringe is formed since the polyester yarns are used; and the yarns contain titanium dioxide, which reacts to ultraviolet rays to display antibacterial and deodorant effects.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004215326-A (JP)
Title: Dc motor with brush
Inventor: KANESHIGE SUSUMU
IPC: H02K23/04
Filed: 2002-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a DC motor with a brush in which abrasion of the brush can be reduced by suppressing a variation in counter electromotive voltage per rotational angle at a moment in time when current supply to a coil is interrupted.  <P>SOLUTION: Magnetizing area of each pole is provided, at least partially, with a means for decreasing flux density such that a flux density being generated in the vicinity of a coil by the magnetic force of the pole when that coil is located in a demagnetizing area indicative of an angular range from a moment in time when current supply to a coil is started to a moment in time when the polarity of a pole facing that coil is switched becomes higher than a flux density being generated in the vicinity of the coil by the magnetic force of the pole when that coil is located in a magnetizing area indicative of an angular range from a moment in time when current supply to the coil is started to a moment in time when the polarity of the pole facing that coil is switched in a current supply interval indicative from start to end of single time current supply to the coil.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004211961-A (JP)
Title: Bathroom air conditioner
Inventor: TAKAHASHI SATOSHI
IPC: F24F1/02
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a bathroom air conditioner capable of deactivating mold and unwanted bacteria floating in a bathroom and effectively suppressing the occurrence of the mold.  <P>SOLUTION: This bathroom air conditioner 1 comprises an air intake port 6 facing the inside of the bathroom 11, an air outlet port 7 facing the inside of the bathroom 11, a ventilation port 8 for exhausting air in the bathroom 11 to the outside, a circulation passage ranging from the intake port 6 to the outlet port 7, an exhausting passage ranging from the inlet port 6 to the ventilation port 8, a fan 24 blowing air in the bathroom 11 or circulating air in the bathroom 11, a damper 9 switching a passage of an air flow caused by the fan 24 to either or both of the circulation passage and the exhausting passage, an ion generating device 23 installed in the circulation passage and generating positive and negative ions, and a ceramic heater 30 installed in the circulation passage.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004503128-A (JP)
IPC: H04B7/08
Filed: 2001-06-25
Abstract: An antenna diversity receiver comprises a zero-IF receiver connected to two antennas ( 102 a , 102 b) via switches ( 532, 534 ). Simultaneous measurement of signal qualities from both antennas is possible by routing signals from the first antenna ( 102 a) via a first mixer ( 106 ) and channel filter ( 116 ) and routing signals from the second antenna ( 102 b) via a second mixer ( 108 ) and channel filter ( 118 ). A diversity controller ( 536 ) compares the signal qualities received from the antennas ( 102 a , 102 b) during a data preamble to select a preferred antenna, then adjusts the switches ( 532, 534 ) to route the signals from the preferred antenna to both input mixers ( 106, 108 ). The amplifier ( 104 a , 104 b) connected to the deselected antenna may be switched off during data reception, thereby minimizing extra power consumption. Such an antenna diversity receiver enables effective antenna selection to be performed, even in systems such as Bluetooth where only a very short preamble is provided for receiver configuration.
Patent JP-2004503319-A (JP)
Title: 縦方向から横方向への運動変換を伴う歯ブラシ
IPC: A46B15/00
Filed: 2001-07-16
Abstract: 歯ブラシ（１０）は、歯ブラシの柄（１６）とともに移動できるように機械的にリンクされた数多くの回転自在のブラシアッセンブリ（１８）を有する。それぞれの回転ブラシアッセンブリ（１８）は、放射状に突出する剛毛（２６）を有するホイール（２２）を備え、歯の接触面（２０）とおおよそ平行である回転軸（２４）のまわりを回転するように構成されている。前記回転軸（２４）は、歯ブラシの柄（１６）の延長方向（１４）に対応する方向である前記歯ブラシ（１０）の主挿入方向（１４）に対して、約１５°と７５°の間、好ましくは、４５°近くの角度で傾斜している。 【選択図】図１
Patent JP-2004505860-A (JP)
Title: 射出成形された環状ガスケットを備えた閉止キャップ及び同閉止キャップを製造する方法
IPC: B29C45/26
Filed: 2001-06-21
Abstract: 閉止キャップ（２０）及び同閉止キャップを製造する方法。同製造方法においては、環状またはリング形状のガスケット（３２）が、プラスチック又は金属によって作られたキャップシェル（２２）の内面（２３）上に射出成形される。この環状又はリング形状のガスケットは、同ガスケットと一体に形成されている径方向に延びているタブ（３７，３８）を含んでおり、タブのうちの一つ（３７）は、プラスチック溶融物が型コア（５２）内の環状のガスケット形成溝（６７）に供給される位置に形成されており、前記タブのうちの他方（３８）は、プラスチック溶融物が前記溝から排出される位置に形成されている。前記他方のタブは、ガスケットと冷却凹部構造との両方の断面積に関して小さい断面積の接続部分（７４）を介して環状のガスケットと連通している冷却凹部構造（７３）を含んでいるのが好ましい。
Patent JP-2004505862-A (JP)
Title: 梱包用クッションを膨張させて密封する方法及び装置
IPC: B65B31/00
Filed: 2001-08-06
Abstract: 梱包用クッションを膨張させて密封する機械（１１）は、寸法がコンパクトであり、必要に応じて膨張クッション形梱包材（６５）の種々の長さのストリップを製造できる。膨張クッション形梱包材（６５）の製造サイクルが行われた後に、製造はすぐに再開できる。膨張クッション形梱包材（６５）を膨張させるのに利用された入口ポートを密封するために、加熱密封要素（７５、８１、８３）は、フィルムウェブに直接的に摺動接触状態で当てられる。
Patent JP-2004506943-A (JP)
Title: マルチカラー・ディスプレイのカラー・バランス調整
IPC: G09G3/32
Filed: 2001-08-14
Abstract: 工場環境の外部で、光および／または光に関連する特性などを測定する高精度機器を用いずにマルチカラー・ディスプレイのカラー・バランス調整を行う技術。一実施形態では、モジュレーション中のいずれかの時点で２つの色がディスプレイ上でほぼ同じに見えるように、選択した２色をモジュレーションすることができる。次いで適用するモジュレーションを調整して、それらの色がほぼ同じに見える点を変えることができる。次いで、少なくとも部分的にモジュレーションの調整測定値に基づいて、ディスプレイのカラー・バランスを修正することができる。
Patent JP-2004506692-A (JP)
IPC: A61P25/06
Filed: 2001-08-24
Abstract: The present invention describes a method for alleviating pain in a patient suffering from chronic pain comprising administering to said patient an analgesic effective amount of a compound of the formula:   
wherein 
R is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, aryl, aryl lower alkyl, heterocyclic, heterocyclic lower alkyl, lower alkyl heterocyclic, lower cycloalkyl, lower cycloalkyl lower alkyl, and R is unsubstituted or is substituted with at least one electronic withdrawing group or electron donating group; 
R 1  is hydrogen or lower alkyl, lower alkenyl, lower alkynyl, aryl lower alkyl, aryl, heterocyclic lower alkyl, heterocyclic, lower alkyl heterocyclic, lower cycloalkyl, lower, cycloalkyl lower alkyl, each unsubstituted or substituted with an electron donating group or an electron withdrawing group; and 
R 2  and R 3  are independently hydrogen, lower alkyl, lower alkenyl, lower alkynyl, aryl lower alkyl, halo, heterocyclic, heterocyclic lower alkyl, lower alkyl heterocyclic, lower cycloalkyl, lower cycloalkyl lower alkyl, or Z-Y wherein R 2  and R 3  may be unsubstituted or substituted with at least one electron withdrawing group or electron donating group wherein the electron donating group or electron withdrawing group is acyclic; and wherein heterocyclic in R 2  and R 3  is furyl, thienyl, pyrazolyl, pyrrolyl, imidazolyl, indolyl, thiazolyl, oxazolyl, isothiazolyl, isoxazolyl, piperidyl, pyrrolinyl, piperazinyl, quinolyl, triazolyl, tetrazolyl, isoquinolyl, benzofuryl, benzothienyl, morpholinyl, benzoxazolyl, tetrahydrofuryl, pyranyl, indazolyl, purinyl, indolinyl, pyrazolindinyl, imidazolinyl, imidazolindinyl, pyrrolidinyl, furazanyl, N-methylindolyl, methylfuryl, pyridazinyl, pyrimidinyl, pyrazinyl, epoxy, aziridino, oxetanyl or azetidinyl; 
Z is O, S, S(O) a , NR 6 ', or PR 4 ; 
Y is hydrogen, lower alkyl, aryl, aryl lower alkyl, lower alkenyl, lower alkynyl, heterocyclic, heterocyclic lower alkyl, and Y may be unsubstituted or substituted with an electron donating group or an electron withdrawing group, or 
ZY taken together is NR 4 NR 5 R 7 , NR 4 OR 5 , ONR 4 R 7 , OPR 4 R 5 , PR 4 OR 5 , SNR 4 R 7 , NR 4 SR 7 ,  SPR 4 R 5 , PR 4 SR 7 , NR 4 PR 5 R 6  or PR 4 NR 5 R 7 ,    
R 6 ' is hydrogen, lower alkyl, lower alkenyl, or lower alkynyl and R 4  may be unsubstituted or substituted with an electron withdrawing group or electron donating group; 
R 4 , R 5  and R 6  are independently hydrogen, lower alkyl, aryl, aryl lower alkyl, lower alkenyl, or lower alkynyl, wherein R 4 , R 5  and R 6  may be unsubstituted or substituted with an electron withdrawing group or an electron donating group; and R 7  is COOR 8 , COR 8 , hydrogen, lower alkyl, aryl, aryl lower alkyl, lower alkenyl or lower alkynyl, which R 7  may be unsubstituted or substituted with an electron withdrawing group or electron donating group; 
R 8  is hydrogen or lower alkyl, or aryl lower alkyl, and the aryl or alkyl group may be unsubstituted or substituted with an electron withdrawing group or an electron donating group; and 
n is 1-4; and 
a is 1-3.