baber/WOPTO huggingface dataset:
Patent CN-201376892-Y (CN)
Inventor: LINXI DONG
IPC: B81B7/02
Filed: 2009-04-07
Granted: 2010-01-06
Abstract: 本实用新型涉及一种磁驱动增大检测电容的微惯性传感器。现有产品限制了传感器振子的质量增加和极板间距的减小。本实用新型中敏感器质量块为刻蚀有栅形条的矩形硅片，两端通过硅支撑梁与锚点连接，两侧边分别设置硅条，驱动器质量块中间刻有环行槽，其与敏感器质量块对应的一侧设置有检测硅条，在驱动器质量块靠近U形梁的外侧锚点位置上设置有驱动器焊点，驱动器焊点与驱动器锚点连接，驱动器相对的两个锚点上设置有外部电流驱动焊点，并在该对应外部驱动电流焊点间设置有金属驱动导线。玻璃衬底表面设置有叉指铝电极，敏感器质量块的每条栅形条与叉指铝电极中的每对叉指相对应。本实用新型工艺简单，有利于降低成本和提高成品率。
Patent CN-201404554-Y (CN)
Inventor: JING WANG
IPC: A61M11/02
Filed: 2009-03-30
Granted: 2010-02-17
Abstract: 本实用新型公开了一种雾化器，包括雾化缸、设置在雾化缸内的气体喷嘴、雾化芯套、带有通气管的缸盖和设置在雾化缸壁上的出气管，所述气体喷嘴穿过雾化缸底部伸入雾化缸内的储液室，所述雾化芯套顶部设置开孔并套在气体喷嘴上，所述缸盖通过其上的通气管和雾化芯套制成一体；本实用新型的雾化器，雾化缸内的雾化芯套和缸盖制成一体，使雾化芯套安装或拆卸更方便，同时可避免拆卸后的雾化芯套丢失。
Patent CN-201429613-Y (CN)
Inventor: JIANZHONG FAN
IPC: G01N21/64
Filed: 2009-07-07
Granted: 2010-03-24
Abstract: 本实用新型公开了一种定量快速检测莱克多巴胺的上转磷光检测试纸条，包括样品吸收区、标记物区、结果扫描窗、终点指示窗四个区，所述的定量快速检测莱克多巴胺的上转磷光检测试纸条分为底板、玻璃纤维纸、免疫层析复合膜、标记物及吸水纸，其特征在于其标记物为上转磷光颗粒；其优点是定量检测，良好的灵敏性、稳定性和安全性，操作简单，自动判读结果。
Patent GE-U1997219-Y (GE)
Title: School Chalk Composition
Inventor: NIZHARADZE NATELA
IPC: C09D13/00
Filed: 1995-01-12
Abstract: This utility model refers to means for writing on smooth dark surface and can be used for making of school chalk. Technical result of the utility model is to exclude expensive and deficite components and to simplify the technology. Technical result is achieved in that in order to obtain school chalk travertin-like lime-stone, bentonite clay and water are used in definite proportion of components.
Patent GE-U20041110-Y (GE)
Title: Line for Treatment of Metallurgical Slag
Inventor: CHUBINIDZE IRAKLI
IPC: B03B9/04
Filed: 2004-04-23
Abstract: 1. Technical Result Increase in efficiency and improvement of the design. 2. Essence A line comprises in series disposed a receiving hopper, a jaw breaker, a sizing screen, magnet catchers and transporters; above the receiving hopper there is mounted inclined at angle 59-600 metallic net, the ration of cells sides makes 1:1,2. The lower part of the net is mounted on the height of no more than 4m, and the jaw breaker is disposed after the sizing screen. 3. Field of Application Metallurgy.
Patent GE-U20151873-Y (GE)
Title: Drying room for linen or cloths with protective overlap
Inventor: LATSABIDZE LALI
IPC: D06F57/12
Filed: 2014-11-17
Abstract: There is represented a drying room for linen or cloths including intended to be attached to building wall the couple of parallel supporting pipes 1 having transversally stretched between thereof the ropes 2 to hung thereon linen and cloths, fixed inclined above the ropes on the supporting pipes the frame, which longitudinal bars 3 are intended to be attached to building wall. From inner side of said bars the telescopic supporting bars 7 are attached, to which waterproof opening overlap 8 is attached.
Patent GE-U20212079-Y (GE)
Title: Method for biodiesel production
Inventor: KUFARADZE ANZOR
IPC: C10L1/19
Filed: 2017-05-19
Abstract: A method for biodiesel production provides triglycerides peretherification with monoatomic alcohols on high temperature, by means of basic catalysts such as potassium (KOH) or sodium (NaOH) hydroxides, shaking of recived mixture, resting, purifying and drying thereof; at that, heating of triglycerides takes place separately before peretherification, within 50÷90C temperature, during 2÷20 min-s, mixing of monoatomic alcohol(s) with basic (hydroxide) catalyst(s) takes place separately; and shaking of mixture takes place during 5÷10 min.; static voltage supply with high voltage electrodes – 1÷25 kV in obtained colloidal solution during 2÷7 h-s takes place at the resting; at that, additionally is possible to use calcium hydroxide (Ca(OH)2) as a catylist with the fol¬lowing ratio of initial ingredients (mass%): Fat 83÷89.8; Methyl Or Ethyl Alcohol 9.2÷16.1; Sodium Hydroxide 0÷0.9; and/or Potassium Hydro¬xide 0÷0.5; and/or Calcium Hydroxide 0÷0.5.
Patent MD-1580-Z (MD)
Title: Biologically active food additives with antioxidant activity
Inventor: MEREUŢĂ ION
IPC: A61P39/00
Filed: 2021-01-27
Abstract: The invention relates to the food industry and sanocreatology, namely to biologically active food additives with antioxidant activity.Food additives include: amaranth seed dry extract, wormwood leaf dry extract, dihydroquercetin dry extract, tribulus dry extract, ginger root dry extract, cocklebur leaf dry extract, walnut peel dry extract, turmeric dry extract, and dandelion root dry extract, ingredients being taken in different qualitative and quantitative ratios.
Patent PE-20140723-Z (PE)
Title: Telar manual de pedal armable y desarmable
Inventor: GONZALES ARNAO WALTER HECTOR
IPC: D03D29/00
Filed: 2012-12-27
Abstract: REFERIDO A UN MANUAL DE PEDAL ARMABLE Y DESARMABLE CONFECCIONADO A PARTIR DE CARTON PRENSADO (MDF), CARACTERIZADO PORQUE SUS PIEZAS SON IDENTIFICADAS CON SU NOMBRE Y NUMERO EN BAJO RELIEVE; Y PORQUE EN EL ARMADO Y DESARMADO NO UTILIZA TORNILLOS O ELEMENTOS SIMILARES. PERMITE REALIZAR DIVERSOS TIPOS DE TEJIDOS ANCHOS Y DELGADOS TALES COMO MANTAS, TAPICES, CINTURONES, CHALINAS ENTRE OTROS
Patent PE-20221814-Z (PE)
Title: Protocolo de incorporacion de frutas deshidratadas en chocolate oscuro
Inventor: CHAVEZ QUINTANA SEGUNDO GRIMALDO
IPC: A23G9/24
Filed: 2022-07-01
Abstract: La invencion comprende en una mejora del proceso de incorporacion de frutas deshidratadas en chocolate oscuro. Para ello, se deshidrataron las frutas por medio de la tecnica de conveccion forzada a fin de eliminar la maxima cantidad de agua. Por otro lado, se ha determinado el momento adecuado de incorporacion de las frutas deshidratadas, a fin de disminuir la perdida de compuestos bioactivos de las frutas y por el contrario potencien la composicion de los chocolates oscuros. Se ha determinado, ademas, que para garantizar la homogeneidad en la incorporacion y evitar la perdida de compuestos antioxidantes y vitamina C de las frutas, esta debe ser incorporada en polvo al final del proceso de temperado, justo antes del momento del proceso de moldeo del chocolate. El proceso desarrollado permite obtener chocolates frutados altamente bioactivos y ricos en vitamina C, optimizando el rendimiento y garantizando un elevado perfil sensorial.
Patent ES-490961-A0 (ES)
IPC: C12Q1/48
Filed: 1980-04-28
Abstract: 1. Process for quantitatively determining gamma-glutamyltranspeptidase by means of a lyophilized salt of gamma-glutamyl-p-nitranilide with an acid, which process comprises dissolving that salt in a buffer, adding the sample containing the gamma-glutamyltranspeptidase and determining the amount of p-nitraniline set free.
Patent ES-499262-A0 (ES)
IPC: C12N15/00
Filed: 1981-02-10
Abstract: Recombinant DNA technology is utilized in the production of interferon and there is provided a microbiologically produced polypeptide, all or part of which comprises the amino acid sequence of human interferon, especially leukocyte ( alpha ) interferon; a cDNA which codes for such a polypeptide; a plasmid especially plasmid pBR 322, which comprises the cDNA; and a microorganism, for example, E. Scherichia coli, especially E.coliK12 or E.coliX 1776, which comprises the genetic information required for the production of such a polypeptide. The cDNA is prepared using mRNA obtained from human leukocytes and/or cells of a human lymphoblastoid cell line.
Patent ES-501330-A0 (ES)
IPC: C08F283/00
Filed: 1981-04-14
Abstract: The invention provides nitrogen-containing basic binders having tertiary amino groups. They are produced from compounds or resins having at least one secondary amino group through reaction with a compound which contains both an epoxy group and an olefinic double bond, followed by copolymerization of the reaction product with a polymerizable monomer having an ethylenic double bond. The binders have amine numbers of about 40 to 400. They can be diluted with water after partial neutralization by acid. They are electrically depositable on the cathode and can be heat hardened alone or in combination with amino resins and/or phenolic resins. They can be used as internal and/or external cross-linking components in cathodic electrocoating paints.
Patent ES-519387-A0 (ES)
IPC: A23B7/02
Filed: 1983-01-29
Abstract: A method of forming a container in order to package separately components of a food product which would be incompatible in admixture during prolonged storage which in one embodiment comprises simultaneously forming and shaping a pot, or cup, and a tray wherein the base wall and boundary wall of the pot are disposed within the confines of the sidewalls of the tray, thereby forming two separate compartments, wherein the opening of the pot and tray are located on opposing sides of a horizontal plane defined by the base of the tray. The components of the food product are packaged by filling the pot with one food product component and by filling the tray with a second food product component and sealing each with a lid. In an embodiment wherein the pot and tray are separately formed, the tray is formed with an annular rib for positioning of the filled pot and each are sealed by a single lid in the method disclosed.
Patent ES-522937-A0 (ES)
IPC: C07D311/68
Filed: 1983-06-01
Abstract: Compounds of formula (I):   <IMAGE> (I)  wherein: one of R1 and R2 is hydrogen and the other is selected from the class of alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy, alkylhydroxymethyl, nitro, cyano, chloro, trifluoromethyl, alkylsulphinyl, alkylsulphonyl, alkoxysulphinyl, alkoxysulphonyl, alkylcarbonylamino, alkoxycarbonylamino, or aminosulphinyl, aminosulphonyl or aminocarbonyl, the amino moiety being optionally substituted by one or two alkyl groups, or alkylsulphinylamino, alkylsulphonylamino, alkoxysulphinylamino or alkoxysulphonylamino, or ethylenyl terminally substituted by alkylcarbonyl, nitro or cyano or -C(alkyl)NOH or -C(alkyl)NNH2, the alkyl groups or alkyl moieties of alkyl-containing groups having from 1 to 6 carbon atoms; one of R3 and R4 is hydrogen or alkyl having from 1 to 4 carbon atoms and the other is alkyl having from 1 to 4 carbon atoms, or R3 and R4 together with the carbon atom to which they are attached are spiroalkyl having from 3 to 6 carbon atoms; R5 is hydrogen, alkyl having from 1 to 3 carbon atoms or acyl having from 1 to 8 carbon atoms; and n is 1 or 2; the lactam group being trans to the OR5 group; have anti-hypertensive activity and are of use in the treatment of high blood pressure.
Patent ES-528460-A0 (ES)
IPC: C07D233/60
Filed: 1983-12-27
Abstract: The invention relates to new aminopropanol derivatives of the formula (I)    <IMAGE>  (I)  wherein R1 is halogen, trihalomethyl, alkoxy having from one to 3 carbon atoms or alkyl having from one to 3 carbon atoms, R2 is alkyl having from one to 3 carbon atoms, and R3 is cycloalkyl having from 3 to 6 carbon atoms, or R2 and R3 together with the nitrogen they are attached to form an up to 8 membered ring optionally containing oxygen or a further nitrogen as an additional hetero atom, and optionally substituted with alkyl having from one to 4 carbon atoms or benzyl, and acid addition and quaternary ammonium salts thereof. According to another aspect of the invention there are provided processes for the preparation of these compounds. The new compounds are suitable for the treatment of acute ethanolic intoxication. Pharmaceutical compositions containing them are also within the scope of the invention.
Patent ES-547679-A0 (ES)
IPC: C11D3/36
Filed: 1985-10-08
Abstract: Microbiocidal compositions and methods for the preparation and use of such compositions in detergents, plastics, fibers, wood, water, coatings and aqueous systems. The compounds used for this purpose are mono alkyl esters of phosphoric acid or the metal or organic salt of said alkyl phosphate.
Patent FI-841388-A0 (FI)
Inventor: JANSSEN KLAUS
IPC: G01V5/14
Filed: 1984-04-09
Abstract: 1. Probe (1) for being introduced into a borehole (3) for the exploration of or deposits, comprising a cylindrical housing (4), in which are concentrically arranged a radioactive radiation source (5) and a detector (17) shielded with respect to the radiation source by a screen (7, 8) for the detection of fluorescence radiation induced by the radioactive radiation in the vicinity of the borehole, characterized in that the screen (7, 8) for forming an irradiated ring (12) on the wall (2) of the borehole (3) forms a slot (6) disposed perpendicularly of the axis of the probe (1) and extending as far as the inside wall of the housing (4), which slot is defined by disc-like surfaces adjusted in their mutual spacing.
Patent FI-844320-A0 (FI)
Inventor: TERVAMAEKI JUKKA
IPC: B01L3/02
Filed: 1984-11-02
Abstract: Diluting dosage device, in which there is a dilution-liquid cylinder (20), a sample cylinder (30), a press knob (2), and a blocking valve (21). When the knob is depressed, the blocking valve is closed and the pistons (16 and 15) in the cylinders move rearwards, whereat dilution liquid flows into the dilution-liquid duct (2), and a certain quantity of sample into the sample duct (23). When the press knob is returned, the blocking valve is opened and the pistons push the sucked sample and a certain quantity of the dilution liquid out through the tip (7).
Patent FI-864589-A0 (FI)
Inventor: DIEN RENE
IPC: C08F222/40
Filed: 1986-11-11
Abstract: Novel, heat-stable imido polymers, well adopted, e.g., as impregnants, or coating or molding resins, comprise the polymerizates of (a) at least one N,N'-bismaleimide, (b) at least one alkenyloxyaniline, and, optionally, (c) at least one N-(meth)allyloxyphenylmaleimide.
Patent FI-871539-A0 (FI)
Inventor: GOERTZ HANS-HELMUT
IPC: A61K9/20
Filed: 1987-04-08
Abstract: Process for the preparation of solid pharmaceutical forms by mixing one or more pharmaceutical active compounds with one or more fusible, pharmacologically tolerated binders and, if required, other conventional pharmaceutical auxiliaries, at from 50 DEG  to 180 DEG C., and subjecting the mixture to injection molding or extrusion and shaping, wherein the fusible binder used is a NVP polymer which contains not less than 20% by weight of NVP as copolymerized units, and, where they are present, all of whose comonomers contain nitrogen and/or oxygen.
Patent FI-881125-A0 (FI)
Inventor: MARIANOWSKI LEONARD G
IPC: H01M8/06
Filed: 1988-03-10
Abstract: A process for production of electricity in molten carbonate fuel cells using a sulfur contaminated fuel gas. The anode polarization is reduced by use of porous anode of greater than about 10 weight percent copper. This results in an improved fuel cell operation when using fuel gas mixtures of over about 10 volume percent carbon monoxide and up to about 10 ppm hydrogen sulfide.
Patent FI-882919-A0 (FI)
Inventor: FORTUNAK JOSEPH M
IPC: C07C205/00
Filed: 1988-06-17
Abstract: A process which comprises reductive cyclisation of a compound of structure (II) <CHEM> in which n is 1 to 3 and X is a group displaceable by amine in the presence of at least two equivalents of anhydrous iron (III) chloride and at least two equivalents of an acetyl halide and a solvent to form a compound of structure (III) <CHEM> in which X and n are as hereinabove defined, Z is halogen. f
Patent FI-903880-A0 (FI)
Inventor: TORGERSON PETER MARTE
IPC: A61K8/89
Filed: 1990-08-06
Abstract: Hair care compositions which provide improved styling and hair conditioning properties are disclosed. These compositions comprise from about 0.1% to about 10.0% of a specifically-defined silicone copolymer and from about 0.5% to about 99.5% of a carrier suitable for application to hair.
Patent FI-911305-A0 (FI)
Inventor: LEMETYINEN MARKKU
IPC: G10K11/172
Filed: 1991-03-18
Abstract: The invention concerns a reactive sound attenuator for air-conditioning ducts, in particular for air ducts in paper mills, said sound attenuator (20) consisting of at least two chambers (21, 23) separated from one another by means of a partition wall (22), which partition wall (22) is provided with an opening or with a tube (24) placed in the direction (A) of flow of the air flowing through the sound attenuator, the air flowing through said opening or tube out of one chamber into the other. The main plane of the partition wall (22) is at an acute angle in relation to the direction (A) of flow of the air flowing through the sound attenuator. The partition wall (22) is at an angle  alpha  of 40 DEG ... 70 DEG  in relation to the direction (A) of flow of the air flowing through the sound attenuator. <IMAGE>
Patent FI-920759-A0 (FI)
Inventor: BOGEN JAN ODD
IPC: B01D37/00
Filed: 1992-02-21
Abstract: The invention relates to a method for thickening and clarifying fine particle suspensions, wherein the suspensions are thickened and clarified in combination with a back-pulse filtration process. The method is characterized by partially submerging one or more filter modules in the fine particle suspension concerned, in open vessels or reservoirs. The suspension is backpulse filtered in these open vessels or reservoirs with the aid of the filter modules. The invention also relates to a filter module which includes one or more parallel working, vertical hollow-tubular filters, and a device for delivering liquid and optionally air to the filter module and removing the liquid and air therefrom during filter operation, this device being common to all filters. The filter module is characterized in that the filters are mounted in a plate and that the plate is covered by an easily opened lid which, when closed, seals against the plate. The lid also includes connectors through which liquid and air are delivered to and removed from the module. <IMAGE>
Patent FI-933036-A0 (FI)
Inventor: DAMES ANDREW NICHOLAS
IPC: G06M1/274
Filed: 1993-07-01
Abstract: PCT No. PCT/GB92/00014 Sec. 371 Date Jun. 15, 1993 Sec. 102(e) Date Jun. 15, 1993 PCT Filed Jan. 3, 1992 PCT Pub. No. WO92/12402 PCT Pub. Date Jul. 23, 1992.A magnetostrictive element, which may be of rectangular shape, is positioned next to a hard magnetic biasing element field with patterns recorded therein which bias the magnetostrictive element to resonate at selected frequencies, particularly harmonics of the fundamental frequency, in response to an alternating interrogating magnetic field at the same frequencies. Data may thus be encoded by selecting the frequencies at which the element will resonate. In addition to resonance at different harmonics, resonance in different modes, particularly longitudinal, transverse or flexural modes may be produced. The device may be applied to article identity systems, such as security systems but also has many other applications.
Patent FI-941987-A0 (FI)
Inventor: ESSER FRANZ
IPC: A61P29/00
Filed: 1994-04-29
Abstract: The invention relates to new amino acid derivatives of general formula I and the pharmaceutically acceptable salts thereof, wherein group B is -A2-NR2R3 or R5, wherein group R5 is and R1, A1, A2, R2, R3, R6, R7, R8, R9, X, Y, Z, t and u have the meanings described in the specification, as well as the preparation and use thereof. The novel compounds are valuable neurokinin (tachykinin) antagonists.
Patent FI-945384-A0 (FI)
Inventor: STRAUBINGER WERNER
IPC: F24F3/16
Filed: 1994-11-16
Abstract: The air to be purified is extracted by suction from a work space (2) and fed to at least two parallel active carbon adsorbers (10 to 13). Each adsorber can be switched back and forth between a loading mode in which it adsorbs the solvent vapours from the exhaust air flowing through it and a regeneration mode in which it is separated from the exhaust air stream and flushed with steam and desorbed. To save energy and reduce environmental pollution, it is provided that each adsorber at the end of the regeneration period passes through a drying phase in which exhaust air from the work space flows through the adsorber, which exhaust air is then fed to an adsorber operating in the loading mode. In the periods in which an adsorber operates in the loading mode, it initially passes through a start phase which is followed by a main phase, air streams from the adsorbers in the main phase being returned directly to the work space, while the air stream from an adsorber in the start phase is kept separate from the first-mentioned air streams. <IMAGE>
Patent FI-951210-A0 (FI)
Inventor: KLAVENESS JO
IPC: A61K49/18
Filed: 1995-03-15
Abstract: Proteinaceous gas- or gas precursor-containing microbubble contrast agents, e.g. for use in ultrasound and/or MR imaging, in which the protein matrix is crosslinked by reaction with a bifunctional aldehyde (e.g. a dialdehyde such as glutaraldehyde or an  alpha , beta -unsaturated aldehyde such as acrolein) in an aqueous medium at substantially neutral pH exhibit improved in vivo and storage stabilities, particularly if the matrix is also reacted with a Schiff's base reducing agent such as a borohydride. Modification of the size distribution of such crosslinked proteinaceous gas-containing contrast agents, e.g. to reduce the mean size of the microbubbles, further enhances their stability and permits preparation of novel contrast agents having a particularly narrow microbubble size distribution.
Patent FI-953494-A0 (FI)
Inventor: CUYPER DIRK DE
IPC: B29C33/44
Filed: 1995-07-19
Abstract: PCT No. PCT/BE94/00007 Sec. 371 Date Jul. 19, 1995 Sec. 102(e) Date Jul. 19, 1995 PCT Filed Jan. 20, 1994 PCT Pub. No. WO94/16871 PCT Pub. Date Aug. 4, 1994Method for manufacturing plastic objects, in particular preforms, in which the raw material for manufacturing said objects is injected into a mould, in which said objects are cooled for hardening said injected raw material to a solid object and in that the manufactured objects are removed from the mould by means of two gripper elements (41, 42) and apparatus therefor.
Patent FI-955983-A0 (FI)
Inventor: DATTA RABINDRA NATH
IPC: C08K5/3415
Filed: 1995-12-13
Abstract: PCT No. PCT/EP94/01811 Sec. 371 Date Dec. 11, 1995 Sec. 102(e) Date Dec. 11, 1995 PCT Filed Jun. 3, 1994 PCT Pub. No. WO94/29380 PCT Pub. Date Dec. 22, 1994A rubber composition which is the vulcanization reaction product of a rubber, particular anti-reversion coagents, and a sulfide resin, is disclosed. The invention also relates to a vulcanization process which is carried out in the presence of an anti-reversion coagent and a sulfide resin and the use of an anti-reversion coagent in combination with sulfide resin in a process for the vulcanization of rubber. The resulting vulcanized rubbers have significantly improved physical properties.
Patent FI-960499-A0 (FI)
Inventor: TSCHURBANOFF ALEKSEI
IPC: B65H75/34
Filed: 1996-02-02
Abstract: PCT No. PCT/FI97/00056 Sec. 371 Date Jul. 15, 1998 Sec. 102(e) Date Jul. 15, 1998 PCT Filed Feb. 3, 1997 PCT Pub. No. WO97/28592 PCT Pub. Date Aug. 7, 1997A method and an arrangement for controlling cable winding and unwinding in an electrically driven vehicle. In the method, cable winding and unwinding, respectively, are controlled on the basis of the position of driving and/or steering means of the vehicle. The arrangement comprises only one unwinding valve connected in series with a hydraulic motor, by which valve the counterpressure of the hydraulic fluid flowing through the hydraulic motor can be regulated during cable unwinding from the reel, and one unwinding valve respectively, by which the quantity of the hydraulic fluid coming to the hydraulic motor can be regulated during cable winding.
Patent FI-961914-A0 (FI)
Inventor: ANDERSSON KJELL HJALMAR
IPC: A61P9/12
Filed: 1996-05-06
Abstract: PCT No. PCT/SE94/01031 Sec. 371 Date Dec. 14, 1994 Sec. 102(e) Date Dec. 14, 1994 PCT Filed Nov. 3, 1994 PCT Pub. No. WO95/12578 PCT Pub. Date May 11, 1995Compounds of the general formula    <IMAGE>  I  wherein R1 and R2 are independently selected from the group consisting of hydrogen, chloro, bromo, nitro, cyano, trifluoromethyl, and R3 and R4 are independently selected from straight or branched lower (1-5 carbon atoms) alkyl groups, and including all optical isomers, provided that when R3 is methyl and R4 is tert.-butyl, then R1/R2 are not hydrogen/hydrogen, hydrogen/2'-trifluormethyl, 2'-chloro/3'-chloro, and when R3 is methyl and R1/R2 is hydrogen/3'-nitro, then R4 are not methyl, ethyl, propyl, iso-propyl, tert.-butyl, processes for their preparation, pharmaceutical preparations containing them and the use of the compounds in lowering the blood pressure.