baber/WOPTO huggingface dataset:
Patent AT-E312010-T1 (AT)
Inventor: MASSETTI ROBERTO
IPC: B61K9/08
Filed: 1999-04-14
Granted: 2005-12-15
Abstract: Method and apparatus to monitor imperfections in rails (11), wherein a monitoring unit (13) is suitable to monitor the geometry and wear parameters both of each rail inspected and of the two rails (11) of the same track (12), a first electronic memory (55c) is suitable to memorise at least temporarily the data monitored, a second electronic memory (55a) is suitable to memorise the nominal or specification values of the geometric parameters, at least a calculator (50) is associated with the monitoring unit (13) and with the electronic memories (55c, 55a) to compare the data monitored with the nominal values, and a third memory (55b) is suitable to memorise data relating to the pre-determined tolerances of the nominal values, the calculator (50) is suitable to associate the data monitored with the data relating to the tolerances and wherein the display means (58, 59) are suitable to display the data relating to the tolerances together with the result of the comparison in order to show whether the data monitored is within or outside the pre-determined tolerances. <IMAGE>
Patent AT-E283145-T1 (AT)
Inventor: BENETTI FEDERICO
IPC: B24B9/00
Filed: 1999-08-09
Granted: 2004-12-15
Abstract: A machine for stone surface treatment, particularly for slabs made of stone or similar, such as marbles, granites, but also ceramics and other building materials used for flooring and lining, which comprises means (2, 2', 2'', 10, 8, 8', 13, 13') for grinding and/or polishing and/or shaping rims or edges and means (1) for conveying workpieces (P) to said grinding and/or polishing and/or shaping means (2, 2', 2'', 10, 8, 8', 13, 13') According to the invention, said machine comprises at least one grinding and/or polishing and/or shaping tool, consisting of a plurality of grinding and/or polishing and/or shaping members (402, 310) which are mounted on annular conveyors, having the form of a rotatably driven continuous band, chain or belt (2, 2', 2'', 10, 8', 13'). <IMAGE>
Patent AT-E238179-T1 (AT)
Inventor: KRIEGEL DIETER DIPL-ING
IPC: B60K35/00
Filed: 1999-10-08
Granted: 2003-05-15
Abstract: The multifunction control element has control buttons (10) exclusively arranged at the edge of the display screen (3) and visually represented on the screen as a visual continuation of themselves. The control buttons are soft key buttons whose associated functions can be displayed on the screen as function symbols generated close to the buttons.
Patent AT-E390535-T1 (AT)
Inventor: SCHOLTEN JAN
IPC: E05F3/10
Filed: 1999-10-12
Granted: 2008-04-15
Abstract: The rotary door drive has an electromagnetic or electrohydraulic drive device that delivers the opening or closing torque required for opening and closing a connected rotary panel, an electronic regulator/controller with at least one memory and at least one microprocessor that causes opening and closing depending on sensor signals via a drive shaft (32). A device between the drive shaft and a rod or actuating arm causes a variation of the opening and/or closing torque over the rotation angle of the connected door panel
Patent AT-E247069-T1 (AT)
Inventor: WOERNER CHRISTOPH
IPC: F16K5/06
Filed: 1999-10-18
Granted: 2003-08-15
Abstract: A yarn blow-in valve is constructed of a base body and a connecting piece. This permits locating a compressed air line behind a cover wall, assembling the yarn blow-in valve, and then coupling it to the air line in a readily performed manner. In order to facilitate the assembly, a coupling device is provided to connect the base body with the connecting piece.
Patent AT-E263905-T1 (AT)
Inventor: NIEMETZ HERMANN
IPC: E05D15/16
Filed: 1999-11-25
Granted: 2004-04-15
Abstract: A wall break segment cover hinge employs a roller (48) per segment (10,12) whose roller axis (50) coincides with the hinge (14) axis (24) and the first hinge tab (20) fixer sector (26) has cover leaves (30) at both axial ends (28) to project vertically in the same direction. Thus the leaves externally close off the wedge space when the segments (10,12) swivel round the hinge axis (26). The hinge axis (24) itself consists of a tubular sleeve (42) fixed to the first hinge tab (20) and fixed between the two cover leaves (30), and the axis (5) of the respective roller (48) has a bearing sector (52) adapted in diameter to the clear inside diameter of the sleeve (42). Roller bearing sector (54) for the respective roller should have a diameter larger than that of bearing sector (52).
Patent AT-E425934-T1 (AT)
Inventor: REIFENSCHEID CHRISTIAN
IPC: B66C23/70
Filed: 1999-07-05
Granted: 2009-04-15
Abstract: A mobile crane including an inclinable telescopic jib having a base case, a plurality of telescoping segments which can be extended and retracted, at least an inner-most one of the telescoping segments being pivotable in a direction of the inclinable jib and connected to a non-bending one of the segments by a hinge which forms a bending point which can be closed and opened, the hinge of the bending point being arranged on the underside of the jib, and an adjusting device arranged on a topside of the jib for opening and closing the bending point.
Patent AT-E298051-T1 (AT)
Inventor: PARAVISI MARCO
IPC: F16D65/095
Filed: 1999-12-16
Granted: 2005-07-15
Abstract: A safety device for support pins for pads of vehicle brake calipers, particularly for disk brakes, in which at least one support pin (38) is supported removably by a caliper element (30) which is intended to hold the pads, and which has means (1) which can be associated removably with the support pin (38) to prevent the support pin (38) from slipping out of the caliper element (30) comprises, for each support pin (38), a respective clip (4) with an eye (7) which can be mounted astride the support pin (38) so as to extend around it, the pin support (38) having abutment means for preventing relative axial sliding of the clip (4) on the support pin (38) in at least one direction, so as to oppose slipping of the support pin (38) out of the caliper element (30). <IMAGE>   <IMAGE>
Patent AT-E298466-T1 (AT)
Inventor: LAITY IAN A
IPC: G09F13/18
Filed: 1999-04-16
Granted: 2005-07-15
Abstract: An electronic device adapted to be coupled to an information transfer system by means of a conductor including a standard connector having a translucent or transparent body insertable into a receptacle defined by the electronic device, the device including a housing, a substrate carrying electronic components, a light source mounted on the substrate and connected to components on the substrate, the light source being energizable in response to electrical signals generated by said components, the signals being indicative of the status and/or activity of the device, and a light guide extending between the light source and the receptacle for transmitting light from the light source to the receptacle, the light transmitted from the source to the receptacle illuminating the connector body thereby providing an indication of the status and/or activity of the electronic device.
Patent AT-E233341-T1 (AT)
Inventor: WILJAN HARRY
IPC: D21B1/34
Filed: 1999-06-02
Granted: 2003-03-15
Abstract: The invention relates to a coarse dirt collector ( 7 ) for removing coarse material from a pulper ( 1 ). The coarse dirt collector ( 7 ) comprises a support arm ( 8 ) with a collecting basket ( 9 ). The collecting basket ( 9 ) consists of a frame ( 11 ) on which tines (Z) are fixed by means of a grid. The coarse dirt collector can be pivoted into and out of the pulper, to which end it moves about an axis of rotation (A) positioned at an angle to the plane that is perpendicular to the longitudinal axis (P) of the pulper. Said angle is between 20° and 40°. The advantage of said device is that the coarse dirt collector ( 7 ) has to carry out only one movement between its collecting and unloading position and unloading can take place automatically without need for a special scraping device. Because of the position of the tines (Z) there is no risk of undesirable loss of coarse material prior to unloading. This minimizes the mechanical and control-engineering related complexity of the device provided for by the invention in relation to the prior art and reduces the raking process cycle time. The coarse dirt collector is constructed such that it has as large a capacity as possible for the collection of coarse material. The coarse dirt collector also makes it possible selectively to remove only light-weight coarse material from the pulper.
Patent AT-E280135-T1 (AT)
Inventor: ZILVERENTANT ARNOLD GERRIT
IPC: C02F3/34
Filed: 1999-07-19
Granted: 2004-11-15
Abstract: A process is described for the biological treatment of waste water containing a specific component such as ammonia, wherein the waste water together with surplus sludge from an activated sludge reactor is treated in a bioaugmentation reactor, applying a hydraulic retention time in the continuously or discontinuously operated reactor which is shorter than the sludge retention time by retaining part of the sludge in the reactor and continuing the use of the separated part in the reactor. The non-retained part of the sludge, together with the effluent of the bioaugmentation reactor, is added to the activated sludge reactor.
Patent AT-E271737-T1 (AT)
Inventor: BOZENHARDT JOHANNES
IPC: H04B10/18
Filed: 1999-05-26
Granted: 2004-08-15
Abstract: Subscribers in optical data transmission systems usually receive binary signals with some temporal distortion due to attenuation within the transmission link. The invention relates to a method and a circuit for restoring a distorted binary signal to obtain an intact binary signal. According to said method, the baud rate of the binary signal does not need to be known exactly to the receiving subscriber in the optical data transmission system. The invention is used in optical data transmission systems.
Patent AT-E315297-T1 (AT)
Inventor: CARNEAL BRUCE L
IPC: H04L12/28
Filed: 1999-07-20
Granted: 2006-02-15
Abstract: A communication system is comprised of three communication resources; a contention-type access block (112), a non-contention access block (114) and a second non-contention access block called a reserved block (110). Each time that a remote unit (104) has a block of data to transfer to a hub station (100), the remote unit (104) sends the block of data over the contention-type access block (112). The remote unit (104) it also sends a corresponding notification message over the reserved block (110). If the hub station (100) receives the notification message but not the block of data, the hub station (100) sends a response message to the remote unit (104) which designates the resource within the non-contention access block (114). The remote unit (104) sends the block of data over the designated resource. <IMAGE>
Patent AT-E315688-T1 (AT)
Inventor: MACDONALD ROBERT
IPC: E02D17/18
Filed: 1999-08-12
Granted: 2006-02-15
Abstract: A retaining wall block has parallel top and bottom faces, a front face, a rear face, first and second side wall faces and a vertical plane of symmetry extending between the front and rear faces. The block is formed as a body portion including the front face, a head portion including the rear face and a neck portion connecting the body portion and the head portion. The body, head and neck portions each extend between the top and bottom faces and between the first and second side wall faces. An opening extends through the neck portion from the top face to the bottom face, dividing the neck portion into first and second neck wall members extending rearwardly from the body portion to the head portion.
Patent AT-E331945-T1 (AT)
Inventor: ADAMS BRUCE
IPC: G01J5/02
Filed: 1999-08-06
Granted: 2006-07-15
Abstract: A temperature sensor for measuring a temperature of a substrate in a thermal processing chamber is described. The chamber includes a reflector forming a reflecting cavity with a substrate when the substrate is positioned in the chamber. The temperature sensor includes a probe having an input end positioned to receive radiation from the reflecting cavity, and a detector optically coupled to an output end of the probe. The radiation entering the probe includes reflected radiation and non-reflected radiation. The detector measures an intensity of a first portion of the radiation entering the probe to generate a first intensity signal and measures an intensity of a second portion of the radiation entering the probe to generate a second intensity signal. The detector is configured so that a ratio of the reflected radiation to the non-reflected radiation is higher in the first portion than the second portion. The two intensity signals are used to calculate the temperature and emissivity of the substrate.
Patent AT-E256407-T1 (AT)
Inventor: FIORAVANTI ALEX
IPC: A45D34/00
Filed: 1999-11-26
Granted: 2004-01-15
Abstract: A dispensing container includes a sealed compartment closed by a moveable panel having a dispensing aperture therein and a dispensing tube depending therefrom. The moveable panel, dispensing aperture and tube are of an integral homogeneous single piece construction of molded material which effects dosing absent complicated conventional valving and reduces both production and consumer costs.
Patent AT-E297411-T1 (AT)
Inventor: SCHLESIGER HARTWIG
IPC: C08B11/08
Filed: 1999-11-15
Granted: 2005-06-15
Abstract: A process for preparing low-viscosity water-soluble cellulose ethers by the oxidative decomposition of higher-viscosity cellulose ethers with hydrogen peroxide is described. The process involves: (a) forming, under conditions of intensive mixing and at temperatures of 65-125° C., a mixture of, (i) one or more higher-viscosity cellulose ethers, and (ii) an aqueous solution of hydrogen peroxide, the proportions of the mixture being selected in such a way that the hydrogen peroxide content is 0.1-10 wt. % in relation to the dry cellulose ether, the solids content of the mixture is at least 25 wt. % in relation to the total weight of the mixture; and (b) agitating continuously the mixture of step (a) at temperatures of 65-125° C. until at least approximately 90% of the hydrogen peroxide has been spent.
Patent AT-E233759-T1 (AT)
Inventor: AULOMBARD ALAIN
IPC: A61K31/5375
Filed: 1999-12-14
Granted: 2003-03-15
Abstract: The invention relates to a process for preparing (R)-(+)-3-{1-[2-(4-benzoyl-2-(3,4-difluorophenyl)-morpholin-2-yl)ethyl]-4-phenylpiperid-4-yl}-1,1-dimethylurea and the salts, solvates and/or hydrates thereof.
Patent AT-E309205-T1 (AT)
Inventor: BARRETT STEPHEN DOUGLAS
IPC: A61K31/337
Filed: 1999-12-21
Granted: 2005-11-15
Abstract: Benzenesulfonamides of formula (I), in which W is OR1, NR2OR1, NRARB, NR2NRARB , or NR2(CH2)2-4NRARB and the other variables as defined in the claims, are inhibitors of MEK and are effective in the treatment of proliferative diseases, cancer, stroke, heart failure, xenograft rejection, arthritis, cystic fibrosis, hepatomegaly, cardiomegaly, Alzheimer's disease, complications of diabetes, septic shock, and viral infection.
Patent DE-05785589-T1 (DE)
Title: Motorgenerator
Inventor: SUGIMOTO YASUHIRO
IPC: F02M21/06
Filed: 2005-09-20
Abstract: Motorbetriebener
Generator, umfassend ein Kraftstoffbehältnis, welches ein Brenngas
in einem verflüssigten
Zustand speichert, einen Motor, der das Brenngas von dem Kraftstoffbehältnis erhält, einen
Kraftstoffdruckregler zum Regeln von Druck des von dem Kraftstoffbehältnis dem
Motor zugeführten
Brenngases, einen durch den Motor angetriebenen Generator und eine
Leistungs-Steuer/Regeleinheit zum Steuern/Regeln von durch den Generator
erzeugter Leistung, wobei das Kraftstoffbehältnis oder/und der Kraftstoffdruckregler
der Leistungs-Steuer/Regeleinheit benachbart angeordnet ist, um Wärme mit
der Leistungs-Steuer/Regeleinheit auszutauschen.
Patent DE-11158693-T1 (DE)
Title: Pflanzenbeleuchtungsvorrichtung und Verfahren
Inventor: AIKALA LARS
IPC: A01G7/04
Filed: 2011-03-17
Abstract: Eine Beleuchtungsvorrichtung zur Pflanzenkultur, dadurch gekennzeichnet, dass die Beleuchtungsvorrichtung (100) eine Vielzahl von Quantenpunkten (110, 120, 130, 140, 150, 160) verschiedener Größen umfasst.
Patent DE-14155646-T1 (DE)
Title: Papierschredder
Inventor: ARIES PAUL A
IPC: B02C18/00
Filed: 2011-03-25
Abstract: Papierschredder umfassend ein Gehäuse; Messer, die in dem Gehäuse angeordnet sind; eine Zuführbasis, die an dem Gehäuse gekoppelt und dazu ausgelegt ist, einen Papierstapel zu tragen, wobei die Zuführbasis einen Zuführspalt umfasst, durch den hindurch Papier zum Schreddern durch die Messer passiert; eine Zuführanordnung, die oberhalb der Zuführbasis angeordnet ist, wobei die Zuführanordnung eine Zuführklappe umfasst, die im Wesentlichen die gesamte Zuführbasis abdeckt und um eine Achse an einem Ende der Zuführklappe schwenkbar angebracht ist; und eine Druckplatte, die benachbart einer Bodenseite der Zuführklappe zum Bewegen oberhalb der Zuführbasis angebracht ist; und wobei die Druckplatte aus einem Stück ausgebildet ist und den Zuführspalt senkrecht zum Zuführspalt umspannt.
Patent ES-2028749-T1 (ES)
Title: Maquina para bolsas tubulares.
IPC: B65B51/30
Filed: 1989-10-27
Abstract: EL INVENTO SE REFIERE A UNA MAQUINA DE BOLSAS TUBULARES CON AL MENOS DOS MORDAZAS (1) DE SOLDADURA TRANSVERSALES, QUE SE DISPONEN EN LADOS OPUESTOS DE UNA MANGUERA DE PELICULA A SOLDAR Y QUE GIRAN SOBRE UNA TRAYECTORIA (3) CURVA CERRADA. PARA REGULAR EXACTAMENTE LA CANTIDAD DE AIRE A ENCERRAR EN LA BOLSA TUBULAR, SE PREVE, QUE DELANTE DE CADA MORDAZA (1), EN EL SENTIDO DE MOVIMIENTO, SE HALLE UN CUERPO DE EXPULSION (4), QUE UNICAMENTE APOYA EN LA BOLSA EN UNA PARTE DE SU ANCHO, EXPULSANDO ASI EL AIRE CONTENIDO EN LA BOLSA. LA MAQUINA, SEGUN EL INVENTO, SE PUEDE UTILIZAR EN ESPECIAL PARA BOLSAS TUBULARES GRANDES EN LAS QUE DEBA EXISTIR UNA ALMOHADILLA DE DEFINIDA PARA PROTEGER PRODUCTOS DELICADOS
Patent ES-2041637-T1 (ES)
IPC: F16J15/10
Filed: 1990-06-25
Abstract: An annular gasket 1 for sealing joints between male and female socket pipes has an anchoring structure 2 and a sealing body 3, the anchoring structure having an anchoring heel 5 provided with outer peripheral recesses 27.
Patent ES-2093590-T1 (ES)
Title: Limitacion de fuerza en un sistema de retencion de ocupantes.
Inventor: BOEHMLER KLAUS
IPC: F16F7/12
Filed: 1996-03-07
Abstract: EN UN SISTEMA DE RESPALDO CON CINTURON DE SEGURIDAD Y ELEMENTOS DE RESPALDO SE LIMITA LA FUERZA DE RESPALDO EJERCIDA POR MEDIO DEL CINTURON SOBRE LOS OCUPANTES A TRAVES DE UN LIMITADOR DE FUERZA SOBRE UN NIVEL, DE TAL MODO QUE ES AJUSTABLE Y PUEDE SER ADAPTADO AL TAMAÑO DEL CUERPO O AL PESO DEL OCUPANTE DEL VEHICULO. EL AJUSTE DE NIVEL DE FUERZA SE CONSIGUE DE TAL MODO, QUE EN LA LINEA CARACTERISTICA QUE REPRESENTA LA FUERZA A TRAVES DE LA VIA DE APOYO PREVIO EN LA ZONA DE UN TRAMO DE VIA, DESPUES DEL DESARROLLO DEL CONTACTO ENTRE LA BANDA DEL CINTURON Y EL ELEMENTO DE RESPALDO, LA LINEA CARACTERISTICA MUESTRA UNA TENDENCIA DECRECIENTE.
Patent ES-2109211-T1 (ES)
Title: Tensor de cinturon.
Inventor: GREINER GERHARD
IPC: B60R22/22
Filed: 1997-03-21
Abstract: UN TENSOR DE CINTURON PARA UN SISTEMA DE CINTURON DE TRES PUNTOS EN VEHICULOS MUESTRA UNA BANDA DE CINTURON 16, UN ENROLLADOR DE CINTURON 10 FIJO EN LA SUPERESTRUCTURA DEL VEHICULO COMO PRIMER PUNTO DE ANCLAJE, UN CERROJO DE CINTURON 14 COMO SEGUNDO PUNTO ASI COMO UN HERRAJE EXTREMO 18 COMO TERCER PUNTO DE ANCLAJE Y UN ACCIONAMIENTO DE TENSOR 20, QUE SE ACTIVA EN CASO DE TRACCION. PARA OFRECER TAMBIEN, EN RELACIONES DE ESPACIO ESTRECHAS EN EL VEHICULO, DIFERENTES POSIBILIDADES DE APLICACION, EL ACCIONAMIENTO DE TENSOR 20 ENGRANA CERCA DEL HERRAJE EXTREMO 18 EN EL TRAMO DE CINTURON 16A COLOCADO ENTRE EL CERROJO DE CINTURON 14 Y EL HERRAJE EXTREMO 18.
Patent CY-1107578-T1 (CY)
Inventor: AVERBACK PAUL
IPC: A61K38/17
Filed: 2006-10-17
Abstract: The invention is directed to methods of treating conditions requiring removal or destruction of harmful or unwanted cells in a patient, such as benign and malignant tumors, using compounds containing or based on peptides comprising a part of the amino acid sequence of a neural thread protein.
Patent CY-1111041-T1 (CY)
Title: Κατασκευη για επιτραπεζιο παιχνιδι
Inventor: ORTUBAI BALANZATEGUI KRISTINA
IPC: A63F3/00
Filed: 2007-03-06
Abstract: Η εφεύρεση αναφέρεται σε μία κατασκευή για ένα επιτραπέζιο παιχνίδι, που περιλαμβάνει ένα σώμα με ένα κανονικό γεωμετρικό σχήμα και έναν κάθετο άξονα συμμετρίας. Το προαναφερθέν σώμα υποδιαιρείται οριζοντίως σε ανεξάρτητα επίπεδα (1 έως 6) που μπορούν να περιστρέφονται στον συμμετρικό άξονα του σώματος. Η πλευρική επιφάνεια των εν λόγω επιπέδων είναι εφοδιασμένη με εσοχές (7) στις οποίες μπορούν να τοποθετηθούν πιόνια ίδιου σχήματος (10-11).
Patent CY-1107853-T1 (CY)
Inventor: HARRIS ROBERT H
IPC: A61K38/00
Filed: 2008-01-11
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.