baber/WOPTO huggingface dataset:
Patent PT-84433-B (PT)
Inventor: TOOTHILL RICHARD B
IPC: A61K9/22
Filed: 1987-03-09
Abstract: Prepn. of a sustained release bolus formulation comprises (a) injecting a softened dry blend or pelletised dry blend of 1-20wt.% active ingredient (I), 1-40wt.% wax or mixt. of waxes, 0-23wt.% fat and 20-85wt.% high density filler into a mould; (b) cooling the mould to solidify the bolus; and (c) removing the bolus from the mould. (I) is pref. diflubenzuron, avoparcin, sulphamethazine, tetracycline, tylosin or a polyether ionophore, or levamisol, tetramisol, ivermectin or a phenothiazine. The wax may be a paraffin or microcrystalline animal, mineral or vegetable wax.
Patent PT-84543-B (PT)
Inventor: MAZZOLI RENATO
IPC: E05B17/04
Filed: 1987-03-23
Abstract: A single-throw bar lock operating with a conventional cylinder, comprising two parallel toothed plates (3, 8), two bars (20) fixed to them, a main gear wheel (4) and an auxiliary gear wheel (5) which are interposed between said toothed plates and engage with them, said main gear wheel being in the form of a ring gear which is incomplete due to the presence of a slot, said auxiliary gear wheel being a complete circular gear wheel and each of said toothed plates having a discontinuity in the toothing by virtue of a recessed portion (7, 7').
Patent PT-88323-B (PT)
IPC: G02C5/14
Filed: 1988-08-23
Abstract: The device consists of an elongated sheath (10) welded along three of its sides and having an opening defined by the edges (20, 22) enabling a side-piece (24) of the spectacles to be introduced. The sheath (10) preferably covers the side-piece of the spectacles, so as to allow some play, over its whole length up to the frame (26). Application to the protection of side-pieces of spectacles while having a hairdo at the hairdresser's. <IMAGE>
Patent PT-88438-B (PT)
Inventor: COHEN MARLENE LOIS
IPC: A61K31/40
Filed: 1988-09-06
Abstract: This invention provides bicyclic carboxylic esters and amides, their pharmaceutical formulations, and a method for their use in treating migraine, emesis, gastrointestinal disorders, schizophrenia, or anxiety in mammals.
Patent PT-92160-B (PT)
Inventor: KREUZER MARTIN
IPC: B60R21/20
Filed: 1989-10-31
Abstract: The air bag crash protection device which can be integrated into the steering wheel or the dashboard of motor vehicles has a cover consisting of elastic plastic which is connected to the gas generator carrier, the lid of said cover having exactly defined predetermined break lines and the circumferential frame of said cover which is fastened to the carrier being connected in a hinge-like manner to the lid sections formed by the predetermined break lines. In order to be able to dispense with the armouring, the cover consists of a one-piece injection moulded body of thermoplastic elastomer. …<IMAGE>…
Patent PT-96983-B (PT)
Inventor: ALIG LEO
IPC: C07C237/36
Filed: 1991-03-08
Abstract: Acetic acid derivatives of formula H2N(NH)C-X-Y-CO-Z-CH(Q1)COOQ2 (I), their hydrates, solvates and salts. In (I), Q1 = H, CH3 or phenyl. Q2 = H, phenyl-alkyl or physiologically-cleavable alkyl. X = 1,4-phenylene, 2,5- or 3,6-pyridylene or 1,4-piperidylene, which is bound to Y via the 4-C atom. Y = -(CH2)n-CONH-CH(Q3)-(CH2)m- (where n = 0-2 and m = 1-3); -CONH-CH2-CH(Q4)-, -(CH2)2-NHCO-CH2-, -NHCO-(CH2)3-, or a group of formula (a), (b) or (c). In the formulae, Q3 = H, CH3, phenyl, COOH, -COO-alkyl, -CONH-(CH2)2-COOH or -CONH-(CH2)2-COO-alkyl. Q4 = H, CH3 or phenyl. Z = 1,4-piperazinyl, 1,4-piperidinyl (which is bound to the CO group via the 1-N atom) or a group of formula -NH-CH(R1)- or -NH-CH(COR2). R1 = H, CH3, phenyl or COO-alkyl. R2 = an alpha-amino carboxylic acid linked via the amino group (or its ester or amide) or a group of formula -NH-(CH2)2-Ar, -CO2R2, an optionally mono- or dialkylated -CONH2 group, or a pyrrolidinoyl or piperidinoyl. Ar = phenyl optionally substituted by alkyl, alkoxy, -COOH, -CO-alkyl, -O(CH2)p-COOH (p = 1-4), O(CH2)p-COO-alkyl, -CONH2, -CONH-alkyl, -CO(alkyl)2, pyrrolidinoyl or piperidinoyl.
Patent SE-339994-B (SE)
Inventor: RASMUSSEN T
IPC: D21H/
Filed: 1968-11-13
Abstract: 1,207,556. Opening fibrous material; lapforming. K. K. K. KROYER. 7 Nov., 1968 [15 Nov., 1967], No. 52836/68. Heading D1N. The formation of fibre clots in a fibre layer formed on a moving surface 5 is avoided by feeding fibres suspended in a stream of gas through an inlet 22 into a housing 1 placed above the surface 5 and which has a perforated plane base 4 and a stirring device with impellers 13 rotating just above the base. A suction box 6 is mounted beneath the surface 5. Any lumps accumulating on the base are removed through a slit in the housing wall by means of a stream of compressed air issuing from nozzle 19. The lumps then pass via pipe 21 to a disintegrating device, preferably provided with a plurality of nozzles connected with a source of compressed air, before being recycled to the housing. (For Figures see next column)
Patent SE-306048-B (SE)
Inventor: PRAGER G
IPC: B65B25/14
Filed: 1964-12-30
Abstract: 1,079,550. Wrapping-machines; conveyers, chains &c. BELOIT CORPORATION. Dec. 23, 1964 [Sept. 29, 1964], No. 52215/64. Headings B8A and B8C. Apparatus for wrapping, rolls of paper or the like in sheet material comprises a station for centring rolls for wrapping, a pair of rotating drums for. spinning the roll during wrapping and a conveyer passing between the drums which is raised and lowered to lift. a roll from or. lower it on to the drum The. machine may include end. reinforcing &c. tape appliers, wrapper end. folders and end. disc applicators and may be arranged to adjust automatically for various roll sizes. In one arrangement,. Figs. 2, 6, a roll. 37 is placed in rollers. 53 and centring flights 51 move towards. each other to centre the roll for wrapping operation. The rollers 53 are mounted in. pivoted cradles 76, 86, the latter being raised by means 75 to tilt the roll so that it passes on to the. rotating drums. 29. While on the rollers. 53, a probe. (not shown) gauged its diameter so that the correct length of wrapper from one or more. of various width supplies 11-14 would be cut-off after feeding into the nip between the roll and the adjacent drum 29. Glue is sprayed. on to the leading and trailing ends of the wrapper to produce initial adhesion to the toll and final securing of the overlap. A conveyer, Figs. 7, 9, consisting of troughed flights 90 on chains 104 passes between the drums. It is mounted on a beam 103 which is raised bodily by mechanical jacks 91 to lift the roll from the drums and convey it to a station where applicators 32 apply tape either at or between the roll ends. The applicators, Figs. 11, 12 (not shown), comprise tape roll (148), supports (-144), roller feed (151, 152) and glue spray means (163) and are mounted on screw feed carriages (174) for adjustment relative to each other for various roll lengths &c. The conveyer again rises and removes the roll to the end folders 39 likewise adjustable on carriage 193, Fig. 13, and comprising folders 209, each rotated by a tyre 225 which is lowered into contact with the roll periphery by an arm 210. After end folding, a kicker 45 ejects the roll on to a heading station -where members 233 (not detailed) retain by suction, discs which they apply to the roll ends. In an alternative arrangement, Fig. 1 (not shown), the roll is centred and ejected on to drums (24) between which passes the conveyer. The conveyor moves the roll to further drums (29) at a station -where wrapping, taping and end folding are done in succession and the roll is then ejected to the heading station.
Patent SE-444913-B (SE)
Inventor: SCHELKMANN WILHELM
IPC: B29D30/58
Filed: 1981-05-14
Abstract: METHOD OF RENEWAL OF THE TREAD ON A WORN PNEUMATIC OF SOLID RUBBER TYRE The invention is concerned with a method of renewal of the tread of a worn pneumatic or solid rubber tyre. A layer of bonding rubber is applied to the prepared body of the tyre and a prefabricated rubber tread ring is applied. Gaseous inclusions between the applied layers are avoided or led away and the resulting blank is heated in an autoclave for vulcanizing the bonding rubber. The tread rins, which on its underside exhibits a rough face of projections and recesses forming a net work of passages, produced in a press mould simultaneously with the production of the tread and kept fit for bonding, is applied to the body coated with the layer of bonding rubber and any gaseous inclusions are led away out of the layers by application of reduced pressure, where upon the lateral outlet openings from the super imposed layers are sealed off, and/or by squeezing out by means of the exertion of mechanical pressure on the tread.
Patent SE-423679-B (SE)
Inventor: JOHNSSON B A
IPC: A61M1/32
Filed: 1981-07-07
Abstract: A device for the transfer of one or more substances between a gas and a fluid, the gas being introduced into the fluid in the form of bubbles from which the said substances are transferred to the fluid, whereupon the excess gas is removed together with any substances transferred from the fluid to the gas. The device comprises an annular heat and gas exchange chamber (11) with a heat exchanger (12) in the form of a pipe coiled in helical manner. The device is characterized in that the heat exchanger (12) consists of two parts (12a, 12b) coiled in helical manner, one of which is coiled outside the other. The device is intended chiefly as a so-called oxygenator, the said fluid being constituted of blood and the said gas being constituted of oxygen or an oxygen mixture. Carbon dioxide is removed from the blood with the excess gas.
Patent SE-426452-B (SE)
Title: Arrangement for forming of candle ends
Inventor: OLANDERSSON ROLF URBAN
IPC: B26B27/00
Filed: 1981-09-22
Abstract: The present invention concerns an arrangement for forming of the end or ends of a candle, preferably a stearin candle. The underlying purpose of the present invention is to create a candle shaper with especially simple design and with great diversity both in terms of size of candle and type of candle and candle ends. This purpose is accomplished according to the present invention in that the above-mentioned arrangement is provided with two shanks 1, 2 oriented opposite each other for placement at either side of the end of the candle, wherein the side of the shanks 1, 2 facing the end of the candle is curved, so that the edges can be pressed against the surface of the candle's end, and wherein at least one of the shank edges, extending coaxial with the candle, has a blade 5 for working of the candle end during rotation of the candle and/or the shanks 1, 2 as they are pressed against the candle surface. <IMAGE>
Patent SE-449436-B (SE)
Title: Hospital bed back part
Inventor: FINNHULT C A
IPC: A47C20/08
Filed: 1983-09-13
Abstract: The bed back part is collapsible and held in position by a gas spring which, by means of a collapsible lever (24) is located below the base of the bed (28). On the lever is fitted a hand grip (32) of elastically bendable material. The hand grip extends from the lever up through an aperture in the bed base, and has its grip part (32) located along the mattress (40) edge side in an outlet position. This allows a patient lying on the mattress easily to take hold of the grip part to draw in the hand grip, causing the lever to collapse.
Patent SE-445385-B (SE)
Title: Valve, such as a three-port pilot valve, primarily for fluid flow
Inventor: NORDSTROM C
IPC: F16K11/04
Filed: 1983-11-03
Abstract: Valve, such as a three-port pilot valve, primarily for fluid flow, comprising a housing (1, 2) with two or more ports (5, 6, 8) constituting an inlet and outlet, in which housing a stop cock plug (3) or the like is adjustably situated to work together with a seat or the like (4) in the housing, where the size and, where appropriate, composition of the flow can be affected.The invention valve is especially distinguished by the valve housing (1, 2) which is made up of a first, outer housing (1), which contains the aforementioned ports (5, 6, 8), and a second, inner housing (2) that is replaceably situated in the first housing (1) and contains the aforementioned stop cock plug (3) and seat (4). The second housing (2) is to be made in two or more variants based on, for example, the shape of the stop cock plug (3) and seat (4), both/all fitting in the first housing (1) so that the valve properties, most importantly valve characteristics and/or permeability at a specific pressure drop across the valve, the so-called kv value, can be selected by incorporating a specific second housing (2) in the uniform shape of the first housing (1).<IMAGE>
Patent SE-441820-B (SE)
Inventor: MATTSSON KARL-AXEL
IPC: B65D88/12
Filed: 1984-02-29
Abstract: PCT No. PCT/SE85/00095 Sec. 371 Date Oct. 22, 1985 Sec. 102(e) Date Oct. 22, 1985 PCT Filed Feb. 28, 1985 PCT Pub. No. WO85/03921 PCT Pub. Date Sep. 12, 1985.An arrangement for rendering difficult the unauthorized opening of door etc. arrangements on containers which have corner fittings with openings of a non-circular shape. The arrangement enables the security against unauthorized opening of the doors etc. on containers to be increased, using simple means, and it is also possible to remove the arrangements from the said containers when they are not required for the said purpose. A bar or a similar arrangement for preventing opening, which can be fixed across an end wall or another side wall or a roof with a pivotable door arrangement on it, has two locking devices disposed at a mutual distance from each other and adapted to the openings in the said corner fittings, of which at least one locking device can be influenced by a manual influencing member which can be locked to the said bar, the said locking devices being designed so that when the bar and the influencing member are held in a connecting position they can be inserted in the complementary openings in the corner fittings on the container in question, and when in a blocking position they are forcibly retained in the said openings in order to hold the locked bar in place to prevent the container in question from being opened.
Patent SE-452246-B (SE)
Title: Adjustable rail for wardrobes
Inventor: BJORKLUND T
IPC: A47B61/02
Filed: 1986-03-17
Abstract: The wardrobe insert comprises of a frame with the rails (4,5) that support the clothes hanging rail. The hanging rail is connected to a motor (M) which allows the rail to move along the supporting rail, so as to bring the clothes downwards and towards the person. The device can be adapted to different standard widths of wardrobes, and is electrically driven.
Patent SE-459670-B (SE)
Inventor: LOBERG M
IPC: E04F13/04
Filed: 1986-12-04
Abstract: The present invention relates to a net anchoring means for anchoring of a reinforcing net outside an insulation layer which is secured for instance to a wall by means of a mounting means, for instance a collar sleeve (1; 3). The net anchoring means is introduced through a bore of the collar (3) of the mounting means (1; 3) and is prevented from being retracted in that hooks or nobbies (8) of the anchoring menas (6) engage the bore edge at the inner side of the collar (3). The anchoring means (6) also is formed with a through bore so that plaster can enter said bore thereby preventing the hooks or nobbies (8) from becoming released from the said bore edges.
Patent SE-466071-B (SE)
Title: Method and arrangement for high-quality utilization of biofuels
Inventor: GRAVERSEN P
IPC: F22B31/04
Filed: 1988-10-04
Abstract: In an arrangement with a solid-fuel furnace 1 for combustion of biofuels, for example straw or a combination of straw and solid waste, and with a superheater 2 for increasing the temperature of the steam generated, there is also a pyrolysis unit 3 which is supplied with the biofuel and which generates gas. The gas is fed into the superheater, and a degassed pyrolysis residue of the biofuel is fed into the solid-fuel furnace. In this way, an increase in the thermodynamic efficiency is achieved, without using supplementary fuel. <IMAGE>
Patent SE-462666-B (SE)
Title: Overhead projector
Inventor: BERGLUND S
IPC: G03B21/132
Filed: 1988-10-14
Abstract: An overhead projector comprises a horizontal object plate 4, an objective lens 7 and a deflection member 6 in the region above the object plate in one end region 46 of the general projection direction 50, a Fresnel lens 1, the axis of which is directed towards the deflection member 6 and a light source 32 in one focus 3 of the Fresnel lens, the other focus 8 of the Fresnel lens lying essentially on the deflection member 6. The deflection member 6 is a prism and is located above the front end region 46 of the object plate in the projection direction. <IMAGE>
Patent ZA-9510426-B (ZA)
Title: Water-based organopolysiloxane-containing compositions processes for their preparation and their use
Inventor: STANDKE BURKHARD
IPC: C08L83/04
Filed: 1995-12-08
Abstract: Water-based, organopolysiloxane-contg. compsns. (A) are essentially free from organic solvent, have a flash pt. of more than 70 degrees C and generate no alcohol by hydrolysis when diluted with water. Also claimed is a process for the prodn. of compsns. (A).
Patent AT-413401-B (AT)
IPC: B05B7/04
Filed: 2003-12-02
Granted: 2006-02-15
Abstract: The invention relates to a through-flow volume limiter comprising a through-flow body. The through-flow body is penetrated by at least one channel, which can be cross-flown by a fluid, said channel being provided with an inlet and an outlet and at least one gas channel comprising a gas suction channel which is provided with a gas suction opening and a gas outlet opening for a gas which is to be mixed with the fluid exiting from the channel. An inlet funnel is connected to the inlet.
Patent CN-1366402-B (CN)
Title: 分组交换的负载平衡装置
Inventor: JINZHANG LI
IPC: H04L12/803
Filed: 2002-02-05
Granted: 2010-10-13
Abstract: 本发明所实施的分组交换的负载平衡装置，是在多重连接端口网络设备的传输环境中，通过标签的分配机制(Ticket DistributionMechanism)与标签指定机制(Ticket Assignment Mechanism)，促使数据包在分组交换的传输过程中，达到输出负载平衡。并在分组交换的过程中，进一步包含一种负载监视机制(Load Monitoring Mechanism)，使驱动装置能动态调整标签分配机制而使输出负载平衡达到最佳化。
Patent CN-1009085-B (CN)
Inventor: GUANGZHAO MU
IPC: C07C315/02
Filed: 1985-04-01
Abstract: 本发明公开一种将硫醚定量地氧化成亚砜的方法，即以乙酐为溶剂，30%的H 2 O 2 为氧化剂，在室温及氮气保护下，藉助浓硫酸的催化作用将对称及非对称的烷基(或芳基)硫醚定量地氧化成亚砜，本发明的优点是反应时间短，专一性好，收率高，可获高纯度的亚砜。
Patent CN-1004180-B (CN)
Title: 枢轴转动式安装的反应堆围筒屏蔽
Inventor: HANKINSON MICHAEL FRANCIS
IPC: G21C11/02
Filed: 1986-01-10
Abstract: 通过在反应堆围筒周围设置永久性安装的屏蔽支架并使其配接支承诸如铅板之类屏蔽件的方法，来屏蔽在换装燃料过程中在该反应堆周围工作的技术人员。屏蔽支架包括一个环绕围筒的永久性轨道和枢轴转动式地安装在永久性轨道上的摆出臂。在使用期间，屏蔽件通过双头螺栓拉伸器升降机安置到邻近摆出臂的位置，而摆出臂被向外转出，以接受屏蔽件。在安装时，屏蔽件的边缘互相搭接。
Patent CN-1003443-B (CN)
Title: 新型无机人造大理石组成及其制造方法
Inventor: XIANMING BAI
IPC: C04B11/06
Filed: 1986-04-10
Abstract: 本发明是一种新型无机人造大理石的组成和制造方法。它是以铝酸盐收缩补偿水泥，硫铝酸盐早强水泥、硫铝酸盐微膨胀水泥以及Ｉ型低碱度水泥为主要原料，加入填充料、颜料及水，采用一次成型制造人造大理石的方法。此方法不仅生产成本低、工艺简单、无污染和公害，而且后期强度稳定、表面不返碱、不龟裂、光泽度高、耐气候性好、无老化现象。
Patent CN-1008115-B (CN)
Title: 使白酒催化老熟的方法
Inventor: HUAIBIN ZHANG
IPC: B01J29/04
Filed: 1986-11-06
Abstract: 本发明涉及白酒催化老熟的方法。该方法包括使基础白酒按照一定的液体时空速度流过装有沸石催化剂的熟化器，便可达到相当自然贮存半年以上的催熟效果。经上述方法处理的白酒，可以去除白酒中的邪杂臭味，使酒变成绵甜爽净，又无损于酒的香味成分，酒度和风格亦不变。
Patent FI-116402-B (FI)
Inventor: KOIVUKUNNAS PEKKA
IPC: D21G1/00
Filed: 2001-04-17
Granted: 2005-11-15
Abstract: A paper web is calendered by passing the paper web through a nip formed by a heatable thermo roll and a backing roll. The surface temperature of the thermo roll is above the glass transition range of the paper.
Patent FI-130498-B (FI)
Title: Pulp machine having an arrangement for heating a pulp web
Inventor: KARI TIMO
IPC: D21F7/00
Filed: 2021-09-20
Granted: 2023-10-10
Abstract: The invention relates a pulp machine having an arrangement for heating a pulp web. The arrangement includes water distribution means (19) for hot water and steam distribution means (20) for steam both arranged above the pulp web (16). The arrangement includes further includes suction means (21) arranged below the pulp web (16). The water distribution means (19) include a water box (22) and the steam distribution means (20) include a steam box (23). The water box (22) is separate from the steam box (23) and arranged before the steam box (23). Further the suction means (21) include a suction box (24).
Patent HK-1049198-B (HK)
Title: A louvre system
Inventor: METZEN PAUL PETER
IPC: E06B7/088
Filed: 2002-10-31
Abstract: A louvre system is disclosed which includes a frame having spaced apart side frame members (13, 14). A plurality of louvre blades are disposed between, and mounted to the side frame members (13, 14) so as to be rotatable about an axis of rotation. One of the frame members (14) includes a drive arrangement (21) which includes a plurality of gears (28) mounted on a subframe and connected to respective louvre blades. The gears are driven by a timing belt under the drive of a manual or electric actuator, to impart synchronised movement to the louvre blades.
Patent HK-1052919-B (HK)
Title: Highly resistant and ductile fibre concrete
Inventor: CASANOVA PASCAL
IPC: C04B20/00
Filed: 2003-07-18
Abstract: A concrete in which metallic fibers are dispersed, obtained through mixing with water a composition including a cement; ultrafine elements with a pozzolanic reaction; granular elements distributed into two granular classes (C<SUB>1</SUB>)>1 mm and <5 MM AND (C<SUB>2</SUB>) ranges from 5 to 15 mm; cement additions; an amount of water E added in the mixture; a dispersant, and preferably a superplasticizer; metallic fibers, in an amount maximum equal to 120 kg per m<SUP>3 </SUP>of concrete, the contents of the various components (a), (b), (C<SUB>1</SUB>), (C<SUB>2</SUB>), (d) and the amount of water E, expressed in volume, meeting the following relationships: ratio 1: 0.50<=(C<SUB>2</SUB>)/(C<SUB>1</SUB>)<=1.20; ratio 2: 0.25<=[(A)+(B)+(D)]/[(C<SUB>1</SUB>)+(C<SUB>2</SUB>)]<=0.60; ratio 3: 0.10<=(b)/(a)<=0.30; ratio 4: 0.05<=E/[(a)+(b)+(d)]<=0.75; ratio 5: (d)/(a)<=0.20. The invention applies to the manufacture of voussoirs without frameworks, of tiles and of elements of the plate, shell type or the like.
Patent HU-179435-B (HU)
Title: Diagnostical instrument for detecting leukocytes in body-liquides and process for producing reagents for the colourreactions
Inventor: BERGER DIETER
IPC: G01N33/52
Filed: 1979-06-19
Abstract: Diagnostic agent for the detection of leukocytes in body fluids, comprising an absorbent carrier which is impregnated with a chromogen and a buffer substance, wherein the chromogen is a sulfonphthalein ester of the formula   <IMAGE>   wherein R1 is a carboxylic acid residue optionally substituted by halogen or lower alkoxy; or is an amino acid or peptide residue having a nitrogen protective group; R2 is a halogen atom or a lower alkyl radical; and R3 and R4 are individually selected from hydrogen and halogen. Certain of the chromogen are provided as novel compounds.
Patent HU-180220-B (HU)
Title: Process for preparing 3-alkyl-xanthine derivatives
Inventor: KJELLIN PER G
IPC: C07D473/06
Filed: 1979-10-19
Abstract: 3-Alkylxanthines characterized by the formula 
<CHEM>
 wherein R<1> is n-propyl, n-butyl, isobutyl, n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobuty, cyclopentyl of cyclohexylmethyl, and R<2> is hydrogen or methyl, provided that R<2> is methyl when R<1> is n-propyl, n-butyl or isobutyl, or a physiologically acceptable salt thereof, for example the compound 3-cyclopetnyl-3, 7-dihydro-1H-purine-2, 6-dione, have activity against chronic obstructive airway disease or cardiac disease. These compounds are produced by several methods, exemplified by the following one: reacting a compound of the formula 
<CHEM>
 with a compound of the formula
 R<2>-X
 wherein R<1> and R<2> have the definition given above and X is -COOH, -CONH2 or -OC-O-CO-R2 and, if necessary, submitting the obtained product to dehydration. The starting compounds wherein R<1> is n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl or cylohexylmethyl are not previously described in teh literature They are prepared by reacting a compound of the formula R<1>NHCONH2 with cyanoacetic acid, cyclising the produced 1-cyanoycetyl-3-R<1>urea with alkali, nitrosing the so produced 1-R<1>-6-aminouracil with HNO2 and reducing the so produced 1-R<1>-5-nitroso-6-aminouracil with H2//PtO2.