baber/WOPTO huggingface dataset:
Patent UA-127172-C2 (UA)
Title: An underwater scooter for divers
Inventor: VOJE ANDREJ
Filed: 2019-08-05
Abstract: The present invention belongs to the field of equipment for living or working underwater, more precisely to the field of diving equipment, especially underwater propulsion vehicles for divers. The object of the invention is an underwater scooter for divers. The essence of the underwater scooter for divers is in that the thruster is placed above the scuba diving tank when used and below it when it is not used. The interchangeable battery pack is placed around the scuba dive tank. The thruster rotation between both positions is enabled by contact hinge which connects the thruster and the interchangeable battery pack. By holding the command joystick in his/her hand the diver is managing the device. There is a safety cord with karabiner snap hook attached to the command joystick which could be attached to the scuba diving inflated life jacket. Thus, the diver is able to steer the device hands-free.
Patent UA-71816-C2 (UA)
Title: Method for producing composite hydride-forming material
Inventor: BRATANICH TETIANA IVANIVNA
IPC: C01B3/00
Filed: 2003-12-29
Abstract: A method for producing composite hydride-forming material involves operations of hydration and dehydration, in which destructive hydration is carried out while change of hydrogen pressure of prescribed temperature from equilibrium pressure of formation of maximum saturated metal hydride to equilibrium pressure of formation of intermetallide hydride with boundary composition being determined by an amount of atoms of hydrogen in the molecule of intermetallide hydride according to the respective formula.
Patent UA-75491-C2 (UA)
Title: 2-chlorobenzylamide of 2-hydroxymalonanilic acid possessing antioxidant activity
Inventor: BEZUHLYI PETRO OVKSENTIIOVYCH
IPC: A61K31/16
Filed: 2004-06-25
Abstract: The invention relates to the chemical-and-pharmaceutical industry, namely to the synthesis of the novel compounds belonging to the derivatives of dicarboxylic acids, in particular 2-chlorobenzylamide of 2-hydroxymalonanilic acid of the formula: The compound possesses the antioxidant activity.
Patent UA-77534-C2 (UA)
Title: Ceramic solder for soldering the ceramics with the ceramics
Inventor: RABINKOV LEONID GENNADIIOVYCH
IPC: C04B37/00
Filed: 2004-12-17
Abstract: Invention relates to the technology of production of corundum ceramics and can be used for obtaining the large-dimension complex-profile articles made of high-purity corundum ceramics by method of soldering from separate elements. Ceramic solder for soldering the ceramics with the ceramics contains in per cent by weight: SiO2 - 45.0-58.0; CaO - 15.0-25.0; Al2O3 - 10.0-13.0; addition of the metal from the group Mn, Fe, Co, Cr - 1.0-3.0; eutectic mixture BaO-B2O3-SiO2 in the ratio 1:0.41: 0.52 - 9.0-2.1. The problem of developing of durable and thermally reliable joint is solved.
Patent UA-76644-C2 (UA)
Title: Surface grinder for parquet
Inventor: TROIAN VASYL PETROVYCH
IPC: B24B21/04
Filed: 2004-12-31
Abstract: The invention relates to the construction machine building, namely, to the machines for high-quality polishing of parquet and wood floors. A surface grinder for parquet contains a housing, on which an electric motor with vertical rotary shaft, a working body in the form of a set of polishing disks, a centrifugal ventilator for sucking of wastes andsupporting and guided wheels are mounted. In accordance with the invention, the driving wheel of ventilator is fastened on the shaft of electric motor, and the set of polishing disks is set on a separate shaft, which is connected with the shaft of electric motor by a V-belt drive. In this case, two front supporting wheels and two rear self-positioning guided wheels with increase base are mounted. There is a device of pressing the disks against driven pulley of V-belt drive. An apron with felt ribbon, which covers the elements of V-belt drive and working body, is also set. The invention provides for prevention from burning of surface, which is treated, resistance of machine to the lateral skidding; protection against ejection of waste out of the surface grinder.
Patent DE-2740498-C3 (DE)
IPC: F26B21/14
Filed: 1977-09-08
Granted: 1979-06-07
Abstract: Process of drying water-wet solid materials, which process comprises, in a system, A. FORCIBLY CONTACTING THE WATER-WET SOLID MATERIAL WITH CIRCULATING VAPOR OF A FLUOROCARBON HAVING A FLUORINE TO CARBON ATOM RATIO OF AT LEAST 1.0 AND A BOILING TEMPERATURE OF LESS THAN ABOUT 80 DEG  C at atmospheric pressure, said fluorocarbon vapor being at a temperture above about 100 DEG  C and said contacting being carried out in the absence of a substantial amount of a noncondensable gas, such as air or nitrogen, B. PASSING THE RESULTING MIXTURE OF FLUOROCARBON VAPOR AND WATER VAPOR FROM STEP (A) THROUGH A ZONE MAINTAINED AT A TEMPERATURE LESS THAN 100 DEG  AND AT LEAST 1 DEG  C above the atmospheric pressure boiling temperature of the fluorocarbon to condense a substantial portion of the water vapor but not a substantial portion of the fluorocarbon vapor and, preferably, so that the partial pressure of the water in the remaining vapor mixture is less than about 25 cm of mercury, C. HEATING THE VAPOR MIXTURE FROM STEP (B) TO A TEMPERATURE ABOVE ABOUT 100 DEG  C and recycling the mixture to step (a), D. REPEATING STEPS (A), (B) AND (C), WHILE MAINTAINING SUBSTANTIALLY CONSTANT IN THE SYSTEM THE AMOUNT OF FLUOROCARBON VAPOR, UNTIL THE SOLID MATERIAL IS SUBSTANTIALLY FREE OF WATER AND CONTAINS ONLY FLUOROCARBON VAPOR ON ITS SURFACES AND/OR OCCLUDED IN ITS INTERSTICES, AND THEREAFTER E. REMOVING AND RECOVERING FROM THE SOLID MATERIAL THE FLUOROCARBON VAPOR VALUES AND F. RECOVERING SOLID MATERIAL WHICH IS SUBSTANTIALLY FREE OF WATER AND FLUOROCARBON.
Patent DE-4325975-C5 (DE)
Title: Thermostatventil
Inventor: SAUR ROLAND
IPC: F16K31/70
Filed: 1993-08-03
Granted: 2009-09-03
Abstract: Thermostatventil für eine Kühlanlage eines Verbrennungsmotors mit einem thermostatischen Arbeitselement (12), das ein Gehäuse (13) aufweist, das einen Dehnstoff enthält, der temperaturabhängig einen Arbeitskolben (17) aus dem Gehäuse austreibt und damit abhängig von der Temperatur eines Kühlmittels die Positionen eines Hauptventiltellers und eines Kurzschlußventiltellers (27) einregelt, die eine Mischkammer für von einem Kühler durch ein Hauptventil zuströmendes und für direkt von dem Verbrennungsmotor durch ein Kurzschlußventil zuströmen des und anschließend zum Verbrennungsmotor zurückgeführtes Kühlmittel begrenzen, dadurch gekennzeichnet, daß das Gehäuse (13) des Arbeitselementes (12) stationär mittels eines Halters (14) gehalten ist, daß der Arbeitskolben (17) mit dem das Gehäuse des Arbeitselementes topfartig umgebenden, im Bereich seiner Seitenwände mit Durchbrechungen versehenen Hauptventilteller (18) und dem Kurzschlußventilteller (27) versehen ist, daß der Hauptventilteller wenigstens im Bereich seiner Schließposition dichtend auf dem Gehäuse des thermostatischen Arbeitselementes oder dem Halter (14) dieses Gehäuses geführt ist, und der Halter (14) mit Durchbrechungen (35) versehen ist, so...
Patent DE-102006024536-C5 (DE)
Inventor: SCHOENING UWE B
IPC: B65G15/02
Filed: 2006-05-23
Granted: 2012-10-18
Abstract: The curve belt conveyor has a roller-led conveyor belt (1). An element (2) is provided within range of the edge forming the external radius of the curve, and which provides a fastened guide roller (4) of the conveyor belt. The guide roller (3) and or a part of a roller is movable away even from the conveyor belt and the conveyor belt being a one-piece part. The guide roller is tiltable and or adjustable. The roller or a part of the roller is tiltable and or adjustable.
Patent DE-102008022791-C5 (DE)
Title: Lichtvorhang
Inventor: LOHMANN LUTZ DR
IPC: G01V8/20
Filed: 2008-05-08
Granted: 2015-08-06
Abstract: Lichtvorhang zur Erfassung von Objekten in einem Überwachungsbereich, mit einer vorgegebenen Anzahl von Strahlachsen, wobei bei freiem Überwachungsbereich entlang jeder Strahlachse von einem Sender emittierte Lichtstrahlen durch den Überwachungsbereich auf einen zugeordneten Empfänger geführt sind, und wobei Objekte durch eine Unterbrechung der Lichtstrahlen wenigstens einer Strahlachse detektierbar sind, wobei zur Generierung der Lichtstrahlen der Strahlachsen ein einzelner Sender vorgesehen ist, wobei den Strahlachsen sendeseitig unterschiedliche optische Bandpässe (9, 10) zugeordnet sind, so dass die über die optischen Bandpässe (9, 10) geführten Lichtstrahlen (2) der einzelnen Strahlachsen unterschiedliche Wellenlängenbereiche aufweisen, wobei empfangsseitig ein Empfänger (5) mit einem durchstimmbaren optischen Bandpass (9, 10) vorgesehen ist, wobei die Lichtstrahlen (2) der einzelnen Strahlachsen über Lichtführungselemente (11) dem Empfänger (5) zuführbar sind, und wobei der Lichtvorhang (1) einen Sicherheitssensor bildet, welcher eine Auswerteeinheit (8) in Form zweier sich gegenseitig überwachender Rechnereinheiten aufweist, in welcher eine fehlersichere Auswertung der Empfangssignale zur Generierung eines Objektfeststellungssignals durchführbar ist.
Patent DE-102010061263-C5 (DE)
Title: Flachkettenglied für eine Gliederkette sowie Stahlgliederkette mit derartigen Flachkettengliedern
Inventor: BENECKE RAINER DR
IPC: F16G13/18
Filed: 2010-12-15
Granted: 2022-06-15
Abstract: Flachkettenglied für eine Gliederkette, insbesondere eine Fördererkette (1), dessen die beiden Bögen (8, 9) verbindende Schenkel (4, 4.1) bei vertikaler Ausrichtung des Kettengliedes (2) in vertikaler Richtung eine Schenkelhöhe (H) aufweisen, die kleiner ist als die maximale Schenkelbreite (Bs), wobei die maximale Schenkelbreite (Bs) in vertikaler Richtung außermittig sowie zur Schenkelaußenseite (11) hin versetzt angeordnet und die maximale Schenkelbreite (Bs) wiederum größer als die den Nenndurchmesser (N) des Kettengliedes (2) definierende Breite desselben im Bereich seiner Bögen (8, 9) ist, dadurch gekennzeichnet, dass der den Nenndurchmesser (N) des Kettengliedes (2) definierende Bereich der Bögen (8, 9) auf einen wenige Winkelgrade umfassenden Bogenabschnitt von maximal 10 Grad zu beiden Seiten der die Bögen (8, 9) im Querschnitt schneidenden Mittenebene (10) begrenzt ist, dass ausgehend von der Schenkelbreite (Bs) die Breite des Kettengliedes (2) in seinen Bögen (8, 9) stetig bis in den den Nenndurchmesser (N) definierenden Bogenabschnitt abnimmt und dass die in das Kettengliedinnere (5) weisende Krümmung des jeder Bögenhälfte an die Mittenebene (10) grenzenden Bogenabschnittes einen Krümmungsradius aufweist, wobei der Krümmungsradius ausgehend von der Mittenebene (10) über 60 Grad in jeder Bogenhälfte erhalten bleibt, bevor dieser in Richtung zu dem Schenkel größer wird, und wobei der Krümmungsradius größer ist als der halbe Nenndurchmesser (N).
Patent DE-102011088916-C5 (DE)
Title: Warmwasserspeicher mit Überdruckabschaltung
Inventor: BURGHARDT STEFAN
IPC: F16K17/04
Filed: 2011-12-16
Granted: 2019-06-27
Abstract: Offenbart ist ein Warmwasserspeicher (1), insbesondere ein offener Warmwasserspeicher, zur Bereitstellung von Warmwasser, mit einem Tank (4) zur Speicherung des Warmwassers, mit einem Zulauf (6) zur Zuführung von Kaltwasser in den Tank (4), mit einem Auslauf (8) zur Entnahme des Warmwassers aus dem Tank (4), und mit einer zwischen dem Zulauf (6) und dem Tank (4) angeordneten Druckeinrichtung (2) zum Unterbrechen der Kaltwasserzufuhr im Fehlerfall, wobei die Druckeinrichtung (2) ein in Durchflussrichtung (D) des Kaltwassers verschiebbar angeordnetes Dichtelement (3) aufweist.
Patent RU-2373563-C9 (RU)
Inventor: PETRENKO LEV PETROVICH
IPC: G06F7/523
Filed: 2008-04-29
Granted: 2010-03-10
Abstract: FIELD: information technologies. 
     SUBSTANCE: invention is related to computer engineering and may be used in building of arithmetical devices. Device comprises summator, at the outlet of which current sum ±[S Σ ]f(Δt)↓ and resulting sum ±[S Σ ] are formed in format of position-sign numeration system, two registers of opposite shift, two structures of logical elements AND, logical element AND, memory device. 
     EFFECT: improved efficiency. 
     1 dwg
Patent RU-2736237-C9 (RU)
Inventor: ASABA TSUYOSHI
IPC: F15B3/00
Filed: 2018-02-26
Granted: 2021-05-31
Abstract: Устройство (10) повышения давления снабжено парой цилиндров (12а, 12b), установленных с обеих сторон центрального блока (20), поршнями (14а, 14b), каждый из которых размещен внутри одного из пары цилиндров, и поршневым штоком (26), соединяющим поршни. Каждый из цилиндров имеет приводную камеру (34а, 34b) и камеру (36а, 36b) повышения давления, разделенные поршнями. Устройство повышения давления дополнительно снабжено переключающим клапаном (18), переключающимся в результате приведения в контакт с каждым из поршней, и клапаном (98) сброса, размещенным в канале прохождения текучей среды, соединяющем порт (45) подачи и одну из пары приводных камер (34а, 34b) друг с другом. Технический результат – возможность легкого перезапуска устройства. 4 з.п. ф-лы, 7 ил.
Patent DK-26793-D0 (DK)
Inventor: HOHLWEG ROLF
IPC: A61P25/00
Filed: 1993-03-10
Abstract: Tricyclic benzazepines having the general formula nd  beta -marked carbon atoms is a cyclopentene, cyclohexene, furan, dihydrofuran, pyran, dihydropyran, thiophene, oxazole, pyrrole, pyrroline, tetrahydropyridine or dioxole ring, R1 is H or alkyl, R2 and R3 independently are H, alkoxy, halogen, nitro, cyano or hydroxy, or R2 and R3 together may form a furan, dihydrofuran, cyclopentene or dioxole ring and R4 is H, alkoxy, nitro, cyano, hydroxy or halogen, or a pharmaceutically acceptable salt thereof, are useful in treatment of certain disorders in the central nervous system, e.g., psychosis, pain, depression, sleep disturbances, dyskinesia, Parkinson's disease, stroke.
Patent DK-48690-D0 (DK)
Inventor: FOLKERS KARL
IPC: A61K38/04
Filed: 1990-02-23
Abstract: Antide is the decapeptide, N-Ac-D-2-Nal,D-pClPhe, D-3-Pal, Ser,NicLys, D-NicLys, Leu, ILys, Pro, D-Ala,NH2 which is an antagonist of luteinizing hormone releasing hormone (LHRH). This decapeptide, like others of the present invention, has high antiovulatory activity (AOA) and releases negligible histamine. Antide is scheduled for scale-up, safety testing and evaluation in the experimental primate and in clinical medicine. Numerous other peptides having structures related to Antide were prepared and tested. These peptides had variations primarily in positions 5, 6, 7, and 8. Of these, N-Ac-D-2-Nal, D-pClPhe,D-3-Pal,Ser,PicLys,cis-DpzACAla, Leu,ILys,pro,D-Ala-NH2 was one of the most potent and had higher antiovulatory activity than Antide, i.e. 73%/0.25 ug and 100%/0.5 ug vs. 36%/0.5 ug and 100%/1.0 ug. Antide showed significant, (p<0.001) duration of action, when injected at a dose of 10 ug, 44 hours before 50 ng of the agonist, [D-3-Qal6]-LHRH. Antide showed oral AOA at 600 ug (73%) and at 1200 ug (100%) with negligible difference being found between water and corn oil oral formulations.
Patent DK-203489-D0 (DK)
Inventor: STEINMAN LAWRENCE
IPC: C12Q1/68
Filed: 1989-04-27
Abstract: Polymorphic regions of the variable region gene of T-cell receptors can be identified as being associated with particular autoimmune diseases. By detecting the presence of the particular sequence in the host genome, particularly rearranged, or the T-cell receptor expression product, the propensity for the autoimmune disease may be diagnosed. In addition, antibodies or peptides related to the specific sequence may be prepared for use in prophylaxis and therapy.
Patent DK-217285-D0 (DK)
Inventor: KOLLER KLAUS-PETER
IPC: C12P19/34
Filed: 1985-05-15
Abstract: 1. Claims for the contracting states : BE. CH. LI. DE. FR. GB. IT. LU. NL. SE DNA sequence B, obtainable from Streptomyces tendae strains, which produce tendamistat and have preferably been treated with sublethal doses of acriflavine, by isolation of the complete DNA, digestion with Pst l, Southern hybridization with the DNA sequence A, 5'-(**32 P-)CCT TCA GTG TCG TCT TCG TA-3' (A) isolation of the 2.3 kb Pst l fragment, cutting with BamHl, Southern hybridization with the sequence A, isolation of the 0.94 kb Pst l-BamHl subfragment, cutting with Sau 3a, Southern hybridization with the sequence A, isolation of the 0.525 kb BamHi-Sau 3a subfragment and sequencing of the DNA, and which has the following features : a) it is located immediately upstream of the tendamistat structural gene, b) it codes at the amino terminal end for Met-Arg-Val-Arg-Ala-Leu-Arg, c) it codes at the carboxyl terminal end for Ala-Ser-Ala and d) it codes in the middle for a hydrophobic region X which comprises 10 to 25, preferably 17 to 20, amino acids. 1. Claims for contracting state AT A process for the preparation of polypeptides composed of genetically codable amino acids, characterized by the expression, in a host cell of the genus Streptomyces, of a gene structure which contains in the reading frame with the structural gene for the desired polypeptide the DNA sequence B of a prepeptide, which sequence is obtainable from Streptomyces tendae strains, which produce tendamistat and have preferably been treated with sublethal doses of acriflavine, by isolation of the complete DNA, digestion with Pst l, Southern hybridization with the DNA sequence A, 5'-(**32 P-)CCT TCA GTG TCG TCT TCG TA-3' (A) isolation of the 2.3 kb Pst l fragment, cutting with BamHI, Southern hybridization with the sequence A, isolation of the 0.94 kb Pst l-BamHl subfragment, cutting with Sau 3a, Southern hybriridization with the sequence A, isolation of the 0.525 kb BamHl-Sau 3a subfragment and sequencing of the DNA, and a) is located immediately upstream of the structural gene, b) codes at the amino terminal end for Met-Arg-Val-Arg-Ala-Leu-Arg, c) codes at the carboxyl terminal end for Ala-Ser-Ala and d) codes in the middle for a hydrophobic region X which comprises 10 to 25 amino acids.
Patent DK-266089-D0 (DK)
Inventor: HABERZETTL CECELIA
IPC: G01N33/53
Filed: 1989-05-31
Abstract: An assay support, generally planar and elongated in shape, comprises a gripping section (16) a sample receiving well section (12), and a connecting section (14) therebetween, each of the sections being aligned along a longitudinal axis. The sample receiving well section comprises at least two spaced-apart receiving wells (18, 20) each of which has an open end on a first face of the support, a concave inner surface extending concavely into the support, and a convex outer surface which projects convexly from an opposed face of the support. The convex outer surface of at least one of the wells is provided with at least one stabilising leg (21) and the assay support is also provided with a levelling projection (25) which cooperates with the stabilising leg(s) to maintain the support level when resting on a flat surface. The sample receiving section is also provided with a dam means (22) adapted to preclude the flow of a liquid sample from one of the wells to another.
Patent DK-295090-D0 (DK)
Inventor: SUNDHOLM GOERAN
IPC: F16J10/02
Filed: 1990-12-12
Abstract: The invention relates to a working cylinder comprising a cylinder unit with a front end part, a rear end part and a cylinder tube connecting these end parts, a piston movable in the cylinder tube and a piston rod secured to the piston and extending through the front end part. The purpose is to provide a novel, simple solution for securing the cylinder tube to the end parts. Each end part has a shoulder, the cylinder tube being connected to each end part by means of a compression ring which upon deformation of the end of the cylinder tube and by means of said end tightly clamps the end shoulder.
Patent DK-311088-D0 (DK)
Inventor: DATTA SUDHIN
IPC: C08F210/00
Filed: 1988-06-08
Abstract: Polymers of olefin monomers and a substantially uniform concentration of carboxyl, hydroxyl, thio, amino, cabonyl and imino functional group-containing monomers. Polymers of olefin monomers and carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers substantially devoid of halogen. Method for preparing polymers by reacting carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers with non-halogenated organometallic compounds to form masked, functional group-containing monomers and polymerizing polymer chain monomers with the masked, functional group-containing monomers to produce a polymer chain. Method for forming masked, functional group-containing monomers by reacting carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers with non-halogenated organometallic compounds. Masked, carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers.
Patent DK-450486-D0 (DK)
Inventor: SMID JACOB KORNELIS
IPC: C11D1/52
Filed: 1986-09-19
Abstract: The invention relates to a process for the preparation of a detergent containing one or more compounds having the formula RCONH(C₂H₄O)<sub>n</sub>CH₂COOH and/or salts thereof, where R represents a linear or branched aliphatic hydrocarbon group with 5-21 carbon atoms and n is a number from 1-20, by amidating, ethoxylating and carboxy­methylating one or more fatty acids having the formula RCOOH and, if so desired, converting all or part of the ether carboxylic acid obtained to a salt thereof, characterised in that an oil or fat is started from and that this oil or fat is aminolysed in the presence of an alkali(ne earth) metal and the reaction mixture obtained is in the usual manner ethoxylayed, carboxymethylated and, if desired, converted in whole or in part to a salt.
Patent HU-912169-D0 (HU)
Title: Process for the production of 3,3'-ditio-bis(propionic acid)-derivatives and esthers, and medical preparations containing them
Inventor: ANDERSSON CARL-MAGNUS ALEXANDE
IPC: C07C323/60
Filed: 1991-06-27
Abstract: New 3,3'-dithiobis(propionic acids) and esters thereof with immunomodulating effect, processes for their preparation, pharmaceutical compositions containing them and methods of their pharmacological use.
Patent HU-912923-D0 (HU)
Title: Method for producing new ureido derivatives of poly-(4-amino-2-carboxi-1-methyl-pyrrhol) compounds and pharmaceutical preparatives containing said compounds
Inventor: MONGELLI NICOLA
IPC: C07D207/335
Filed: 1991-01-07
Abstract: The invention relates to ureido derivatives of substituted pyrroles of formula    <IMAGE>  (I)  wherein each of m and n, being the same, is an integer of 1 to 3; W is oxygen of sulphur; each of the B groups, which are the same, is a) a saturated or unsaturated, carbocyclic or condensed carbocyclic ring substituted by one or more acid groups; b) a saturated or unsaturated, heteromonocyclic or heterobicyclic ring, containing one or more heteroatoms chosen from nitrogen, oxygen and sulphur, substituted by one or more acid groups; c) a pyranyl or furanyl sugar residue substituted by one or more acid groups; or d) a -CH2(CHA)rCH2A group, wherein each A group, being the same or different, is an acid group and r is 0, 1 or 2; and the pharmaceutically acceptable salts thereof, which are useful as angiogenesis inhibitors.
Patent HU-904912-D0 (HU)
Title: Process for producing thiazole derivatives
Inventor: MATSUO MASAAKI
IPC: A61K31/427
Filed: 1990-08-06
Abstract: A compound of the formula : <CHEM>  wherein  R<1> is hydrogen or acyl which may be substituted with halogen, R<2> is hydrogen, lower alkyl, hydroxy(lower)alkyl, halogen or carboxy,  A is -CH2-, -CO-, -C(=NOR<4>)- [wherein R<4> is lower alkyl, <CHEM>  [wherein m is 0, 1 or 2], and R<3> is aryl which may be substituted with halogen, hydroxy, lower alkoxy, nitro, amino or acylamino; or N-containing unsaturated heterocyclic group which may be substituted with lower alkyl, amino, hydroxy or halo(lower)alkyl,  and pharmaceutically acceptable salts thereof, processes for their preparation and pharmaceutical compositions comprising them as an active ingredient in admixture with pharmaceutically acceptable carriers.