baber/WOPTO huggingface dataset:
Patent FI-93956-B (FI)
Inventor: BLASCHKE HEINZ
IPC: C07D403/12
Filed: 1989-12-05
Granted: 1995-03-15
Abstract: The invention relates to new piperazinylalkyl-3(2H)-pyridazinones of the formula   <IMAGE> I  in which the radicals R1 represents hydrogen, phenyl, benzyl, or (C1-C6)-alkyl which is unsubstituted or substituted one or more times by hydroxyl, piperidine, morpholine or by a group NR4R5 in which R4 and R5 can be identical or different and which represent hydrogen, methyl or ethyl, R2 and R3 represent hydrogen, halogen, (C1-C6)-alkoxy or (C1-C6)-alkyl, where at least one of the radicals R2 or R3 denotes hydrogen, R6 represents hydrogen, (C1-C4)-alkyl, phenyl, benzyl or phenylethyl, B represents (C1-C7)-alkylene which is unsubstituted or substituted one or more times by hydroxyl, (C1-C4)-alkyl or by the group NR4R5 and which can optionally be closed to form an alicyclic 4- to 7-membered ring, R8 and R9, which can be identical or different, represent hydrogen or (C1-C6)-alkyl and Z represents phenyl, naphthyl, pyridyl or thiazolyl, each of which can be unsubstituted or substituted one or more times by (C1-C6)-alkyl, (C1-C6)-alkoxy, benzyloxy, trifluoromethyl, halogen, nitro, (C3-C7)-cycloalkoxy, (C1-C4)-alkylthio, trifluoromethylthio or by the group NR4R5, the pharmaceutically utilizable salts thereof, a process for the preparation thereof and the use thereof as medicament for the treatment of hypertension, cardiac insufficiency and disturbances of peripheral circulation.
Patent FI-93443-B (FI)
Inventor: HINSKEN WERNER
IPC: A61K31/445
Filed: 1990-10-30
Granted: 1994-12-30
Abstract: The present invention relates to a process for the preparation of N-(2-hydroxyethyl)-2-hydroxymethyl-3,4,5-trihydroxypiperidines of the general formula (I) 
<IMAGE>
Patent FI-88593-B (FI)
Inventor: STORMI RAIMO JOHANNES
IPC: B28C5/42
Filed: 1991-03-13
Granted: 1993-02-26
Abstract: A method for making concrete and transporting to casting station in which method with mixing means equipped bowl (4) is used for mixing the concrete and as transporting device is used an excavator (1). The loading of the sand to the mixing bowl (4) is carried out by the excavator and by means of the same vehicle the concrete is transported to the casting station in its mixing bowl.
Patent FI-94712-B (FI)
Inventor: LARSEN HANS KURT
IPC: A21C11/02
Filed: 1991-06-17
Granted: 1995-07-14
Abstract: A machine for the automatic forming of dough based product comprising a conveyor belt (11) above which is a reciprocating punch die (13) fitted with a cutter (15) shaped to conform to the perimeter of the desired dough product and beneath which is a rotating disc (18) provided on its upper surface with a plurality of small rollers (21) arranged to form at least one spiral which rollers (21) are adapted to press against the lower side of the conveyor belt (11) when the punch die descends. <IMAGE>
Patent FI-112074-B (FI)
Inventor: BRAISH TAMIM F
IPC: C07B61/00
Filed: 1993-09-03
Granted: 2003-10-31
Abstract: A novel process for converting trans-isomeric N-methyl-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-naphthaleneamine to cis-isomeric N-methyl-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-naphthaleneamine is disclosed. The process involves contacting trans-isomeric N-methyl-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-naphthaleneamine, or a mixture of same with up to about an equal part by weight of the corresponding cis-isomer, with a basic equilibration agent like potassium tert.-butoxide in a reaction-inert polar organic solvent to ultimately afford a cis/trans-mixture wherein the amount of cis-amine present in said mixture achieves a constant value of about 2:1 on a weight-by-weight basis. The aforesaid resultant mixture is useful as an intermediate product that ultimately leads to pure cis-(1S) (4S)-N-methyl-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-naphthalenea mine (sertraline), which is a known antidepressant agent.
Patent FI-97856-B (FI)
Inventor: THOMAS DENNIS ALBERT
IPC: A61F13/62
Filed: 1993-12-20
Granted: 1996-11-29
Abstract: The invention is a refastenable mechanical fastening system, made of free formed prongs (22) joined to a substrate (24). The prongs (22) taper and are nonperpendicularly oriented relative to the plane of the substrate. The prongs (22) also have an azimuthal angle relative to the machine direction of the substrate. Each prong (22) has an engaging means (30) projecting laterally from the periphery of the prong. The free formed prongs (22) are manufactured by the process of depositing liquid material onto a moving substrate (24) to form the base of the prong, stretching the liquid material in a direction parallel to the plane of the substrate (24), severing the stretched material to form the distal end and engaging means (30) of the prong (22) and allowing the prong to azimuthally angle. The advantageous usage of the fastening system in an article of manufacture, such as disposable absorbent article specifically a diaper, is also disclosed.
Patent FI-95519-B (FI)
Inventor: TURUNEN HARRI
IPC: H02G7/00
Filed: 1994-07-11
Granted: 1995-10-31
Abstract: The invention relates to a marker ball fastenable to a wire for facilitating the detection of the wire. The ball includes two spheerical caps (1, 2) with a gap (3) therebetween for bringing and securing the wire inside a mounting element (5). From the top spherical cap (1) extends an insulation-facilitating cog (4), which further indicates on which side of the ball said wire is capable of passing inside the mounting element (5). The mounting element (5) is fastened to the top spherical cap (1) and held by a spring (9) at a distance from the bottom spherical cap (2) which is movable towards the top spherical cap by means of a clamping screw (8) against the force of said spring (9). The design enables installation from the ground or a boat even on a live wire as a ring (10) at the bottom end of said clamping screw can be grabbed with a hook-pointed implement carried at the end of a long rod.
Patent FI-105459-B (FI)
Inventor: BLOMQVIST SEPPO
IPC: B24B53/007
Filed: 1995-07-11
Granted: 2000-08-31
Abstract: A method and an apparatus for sharpening the surface of a grindstone for a pulp grinder. In the method a high-pressure water jet is obliquely projected on the surface of the grindstone for detaching bonding material between abrasive grains, without excessively wearing a medium between grinding segments. The apparatus comprises a nozzle, arranged to spray water obliquely onto the surface of the grindstone and a high-pressure pump for feeding high-pressure water through the nozzle. The nozzle is arranged to be moved by transfer means in the axial direction of the grindstone while the grindstone is being rotated. <IMAGE>
Patent FI-116286-B (FI)
Inventor: BRANDT BURKHARD
IPC: C02F9/00
Filed: 1995-08-31
Granted: 2005-10-31
Abstract: In an electrochemical treatment the cationogenous components are removed from the cellulose waste lye containing lignin sulphonates in the anode space. Lignin sulphonic acids are produced from the waste lye.
Patent FI-106601-B (FI)
Inventor: VAITOVIRTA HANNU
IPC: H04W76/02
Filed: 1997-04-23
Granted: 2001-02-28
Abstract: The invention relates to a method for implementing transmission in a mobile network in which base stations (BTS) communicate through a transmission network with a base station controller (BSC) and through a radio path with mobile stations (MS). In order that the transmission of the fixed part of the mobile network may be implemented in a simpler way than heretofore, a common transmission link (TL) is established between several base stations and their common base station controller, a combining network element (41, 42) being located at least at one point of the transmission link in which network element signals arriving from different base stations are combined of the base station to which the time slot basis for incorporation into the time slots of the frame structure used on the transmission link in such a way that the signal from the frame of the common transmission link (TL) for the use of the radio channels dynamically in such a way that any one of several different radio channels can use a specific channel on the transmission link.
Patent HU-189849-B (HU)
Title: Process for producing 1,4-dihydropyridine-lactone derivatives substituted with chromone - and thiochromone-groups
Inventor: GOLDMANN SIEGFRIED
IPC: A61K31/495
Filed: 1984-03-23
Abstract: Dihydropyridines of the formula   <IMAGE>   in which R1, R2, R5 and R6 can be hydrogen or various halogen or organic radicals, R4 is an optionally substituted hydrocarbon radical, A is a direct bond, a C1-C20-alkylene chain or a C2-C20-alkenylene chain, which chains are optionally interrupted by O or S X is O or S, and Y is a direct bond, O, S, -NH-or-N-alkyl with 1 to 8 C atoms or a pharmaceutically acceptable salt, are useful as cardiotonic agents for improving heart contractility, antihypotonic agents, for lowering the blood sugar level, for detumescing mucous membranes and for influencing the salt and/or liquid balance.
Patent HU-200658-B (HU)
Title: Process for extermination of cotton-seed weevil, colorado beetle, lucerne-leaf weevil and maize gall nematode by using bacillus thuringiensis towin
Inventor: HERRNSTADT CORINNA
IPC: A01N63/23
Filed: 1987-03-20
Abstract: Spores and crystals of  B .  thuringiensis  strain  san   diego  are useful to control the cotton boll weevil, the Colorado potato beetle, the alfalfa weevil, and the corn rootworm.
Patent HU-203314-B (HU)
Title: Process for separating pentaerithryl-tetrakis/3-(3,5-di/terc-butyl/-4-oxyphenyl)- -propionate/ from the reaction mixture
Inventor: GLUSHKOVA LJUDMILA VASILEVNA
IPC: C07C69/732
Filed: 1987-12-14
Abstract: Penta-erythryl-tetrakis -(3-(3,5-ditert.- butyl-4-oxyphenyl) -propionate is recovered from the reaction mass obtd. by the trans-esterification of 3-(3,5-ditert.-butyl -oxyphenyl)-propionic acid methyl ester with pentaerythritol in the presence of an alkali by: (a) treating the reaction mass with cyclohexane at 100-120 deg.C; (b) filtering at 60-75 deg.C; (c) cooling the cyclohexane soln. to 15-20 deg.C to crystallise the prod.; (d) filtering; (e) re-dissolving in n-hydrocarbons at 45-75 deg.C; and (f) re-crystallising at 15-20 deg.C.
Patent HU-202741-B (HU)
Inventor: ALAPI JOZSEF
Filed: 1989-03-30
Abstract: A találmány szerinti kompozíció, amelyben mosóaktív komponensként ismert, a samponokban, krémszappanokban vagy tusfürdőkben szokásos tisztító hatású felületaktív anyagok, valamint segédanyagok, továbbá adott esetben sűrítő- és/vagy töltőanyagok vannak, a mosóaktív komponens 100 tőmegegységére számítva 3-15 tömegrész háromkomponensű kondicionáló adalékot tartalmaz, mely kondicionáló adalék 50-80 tömegrész önmagában ismert - adott esetben kvatemerezett - N-metil-(2-6 szénatomos)-alkil- vagy -alkenil-amin, vinilimidazol, dimetilamino-(2-6 szénatomos)-alkil - metakrilát, előnyösen dimetilamino-etil-metakrilát, vinilpirrolidon és ak- rilamid monomerekközül legalább egyet tartalmazó homo-, ko- vagy terpolimert, 5-20 tömegrész (I) általános képletű vinilpirrolidon-alfa-olefin kompolimert, amely képletben Rí jelentése hidrogénatom vagy 1-20 szénatomos telített alkilcsoport, R2 jelentése hidrogénatom vagy 1 22 szénatomos telített alkilcsoport, míg R3 és R4 azonos vagy eltérő 6-22 szénatomos telített alkilcsoportot jelent, n értéke pedig 20-80, előnyösen 30-50, és 10-30 tömegrész (Π) általános képletű polioxietilén-glicerin-monoricinoleátot, mely képletben R5 jelentése a ricinolsav alkilláncára jellemző összetételű alkillánc, m értéke pedig 40-50, előnyösen 10-40, tartalmaz. H,C-CH — Rí I   I r2-hc   c-o \/   (I) I -C—CH-- I I r3 r4 J n H,C- OH I HC — O — (CHoCHoOlm —H I   (II) HoC — O—C— Re 0 A leírás terjedelme: 10 oldal, 1 ábra HU 202 741 A -1-
Patent HU-209755-B (HU)
Title: Method for the treatment (conditioning) of raw natural gas and waste gases respectively for their direct vtilization and a block arrangement for the treatment (conditioning) of the gas
Inventor: BORBELY PALNE
IPC: B01D53/00
Filed: 1989-04-07
Abstract: Gas is heated to bring its combustible hydrocarbon content into the gaseous state. Then the remaining liq. - components and solid particles are removed. The gas pressure is reduced in one or more steps, to the level required by the user, while heat is added to maintain the heaviest hydrocarbon in a dry state. If required, the gas is filtered again and its temp. is adjusted as required by the user. The equipment comprises a heater filter/separator and units (TPi) which are connected in series in the required numbers, each comprising a heater, pressure reducer and a by-pass. The last of these units is connected, directly, or through a fine filter and/or final heater to the user which is pref. a gas burner. - (Dwg.No.0/1)
Patent HU-193987-B (HU)
Title: Process for preparing polyester resin solutions modified by vinyl compounds
Inventor: BUERCHNER ISTVAN
IPC: C08G63/46
Filed: 1985-06-13
Abstract: Polyester resins of regular chemical structure comprise (all wt.% values): (A) 1-15 satd. monohydric alcohol, 2-35 dicarboxylic acid or its anhydride, 2-20 oxirane ring cpd. pref. glycidyl-methacrylate or fumarate and 0-25 satd. oxirane ring contg. cpd. pref. 2 ethyl-hexyl-glycidyl ester, or (B) 4-16 monohydric alcohol, 4-31 unsatd. dicarboxylic acid anhydride 12-16 satd. oxirane ring cpd. pref. epoxydised soyabeanoil-phenyl-glycidyl ester, 0-27 satd. monocarboxylic acid or, (C) 2-20 unsatd. monohydric alcohol, 10-20 satd. dicarboxylic acid anhydride 10-45 satd. oxirane ring cpd. pref. epoxydised butyl-oleate, butyl-glycidyl ether and 0.05 tert-ammonium cpd. - These resins (5-90) are suited at 25-50 deg.C with (95-10) vinyl or acrylic ester monomers e.g. with maleic acid ester. To every 100 pts.wt. of mixt. 0.5-2.5 of a peroxide initiator is added and 12-80 organic solvent. This mixt. is kept at 70-160 deg.C for 1-5 hrs. Solid concns. are finally adjusted by solvent addn. to required levels.
Patent HU-193118-B (HU)
Inventor: KARASZEK ZOLTAN
IPC: G11B21/10
Filed: 1985-06-18
Abstract: ávjai (1,2) excentricitásának mérésére, amelynek
során a fejet (3) álló lemezcsomag mellett
érintőirányban periodikusan mozgatjuk és ezzel
lényegében normál olvasást végzünk. A fej
(3) és a lemezfelület között folyadékfilmet alakítunk
ki. A szervosáv (1,2) dipulzusainak olvasásával
megállapítjuk a szervosávnak (1,2)
a fejhez (3) képest felvett excentricitását és annak
irányát. Az eljárás által szolgáltatott excentricitás
a szervolemez központosítására is
lehetőséget teremt.
Patent HU-207387-B (HU)
Inventor: MICZKO JANOS
IPC: F16K7/06
Filed: 1990-04-25
Abstract: A találmány csőelzáró szerkezet, különösen szemcsés anyagot tartalmazó közeg szállítására szolgáló csövekhez, amely csőelzáró szerkezetnek áramlási keresztmetszetet meghatározó, egy házban befogott, elasztikus anyagból való tömlője és ezt deformáló záróelem van. A találmány szerinti csőelzáró szerkezetet az jel- lemzi, hogy a ház (2) falának támaszkodó tömlője (1) van és hogy záróelemének (3) a tömlő (1) deformálásában részt vevő szakasza forgástest alakú, továbbá hogy a záróelem (3) mozgásterét jelentő és/vagy ezzel közlekedő zárt tere („c”), és az ezt határoló falban kiképzett, érzékelőt csatlakoztató és/vagy közegelvezető legalább egy furata („d”) van.  1. ábra HU 207 387 B A leírás terjedelme: 4 oldal (ezen belül 1 lap ábra)
Patent HU-204405-B (HU)
Title: Activated fungicide composition containing substituted 1,2,4-triazols as active components and process for producing morpholino-alkyl-aryl- -sulfonates as activating component
Inventor: NOWAK EDWARD
IPC: C07D265/30
Filed: 1987-06-05
Abstract: Microbicidal agent containing a compound of the formula I 
<IMAGE>
 or an acid addition salt of this compound in which
 Z represents -CH2CH2-, CH2CH2CH2-, -CH(CH3)- or -CH2-CH(C1-C10-alkyl)-; and
 Ar represents a thiophenyl radical, halogenothiophenyl radical or a naphthalenyl radical, or represents a phenyl radical which is unsubstituted or optionally up to trisubstituted by halogen, C1-C4-alkyl, C1-C4-alkoxy, cyano or nitro
 and a salt of the formula II 
<IMAGE>
 in which
 the R radicals independently of one another represent C1-C4-alkyl,
 R<1> represents hydrogen or C1-C4-alkyl,
 m represents 0, 1, 2, 3 or 4 and
 n represents 0, 1, 2, 3 or 4,
 and novel salts of the (restricted) formula II, their preparation, and the control of microbial infections of plants using the above agents.
Patent HU-201205-B (HU)
Inventor: MARTON L CSABA
IPC: A01H1/04
Filed: 1988-06-08
Abstract: A találmány tárgya eljárás humán hasznosítású, magas grízkihozatalú kukorica gazdaságos termesztésére. Az eljárás abban áll, hogy a kiválasztott fajták magvait korán elvetve a hasonló körülmények között termelt takarmánykukorica tőszámához képest mintegy 10%-al alacsonyabb tőszámot hagyunk meg, hatóanyagban számítva hektáronként legfeljebb 120 kg nitrogén dózist használunk mintegy 0.7-0.8:1:1 N:P:K arány mellett, az első öntözést legkorábban a nővirágzást követő húsz napón túl önmagában ismert módon végezzük el. HU 201 205 A A leírás térjedelme: 4 oldal, rajz nélkül -1-
Patent HU-189085-B (HU)
Inventor: FOELDI TIVADAR
IPC: E02B15/04
Filed: 1983-09-01
Abstract: A találmány eljárásra és berendezésre vonatkozik vízfelületnek szennyeződéstől, különösen olajszennyeződéstől történő megtisztítására. Az eljárás szerint a víz felszíne alatt, a víztükörre (12) merőleges irányban az említett víztükörtől távolodó értelmű stacioner áramlást hozunk létre, ezzel a víz felszínét a létrehozott áramlás centruma felett homorúvá tesszük, és az ide folyó olajat vagy más szennyező folyadékot önmagában ismert módon kiszivattyúzzuk. A berendezés lényege, hogy úszó testek, célszerűen tartályhajók (10) közé összekötő tagok (9) közbejöttével fémszegmenseket (6) tartalmazó hengerpalást (5) vagy ahhoz közel álló alakú test van fiigesztve, amelynek egyes szegmensei mágnestekercsekként (1, 2), illetve elektromágnesek fegyverzeteiként (3, 3a, 4, 4a) vannak kialakítva, a hengerpalást (5) villamos szerelvényei az összekötő tagon (9) elhelyezkedő villamos vezeték útján a tartályhajón (10) elhelyezett villamos generátorhoz kapcsolódnak és a tartályhajóból (10) a felgyűlt olaj (13) környezetébe önmagában ismert vezeték (11) nyúlik.  I. óbro -1-
Patent HU-198169-B (HU)
Title: Continuous process for producing aldehydes
Inventor: HIBBEL JOSEF
IPC: B01J31/00
Filed: 1983-09-12
Abstract: The continuous preparation of aldehydes from olefins and synthesis gas by the use of a water-soluble catalyst system containing rhodium. The reaction takes place at 100 to 30,000 kPa and 90 DEG  to 150 DEG C. The proportion of gaseous components in the liquids is 5 to 30% by volume, based on the total gaseous and liquid components, the volume ratio of aqueous to organic parts being 1:1 to 100:1. After completion of the reaction, the liquid components and the gaseous components are separated into a liquid phase and a gaseous phase, then the liquid phase is divided into aqueous and organic parts, separation taking place without previous cooling. The heat contained in the reaction product is either removed by water or steam, or is carried over to the hydroformylation products.
Patent HU-198238-B (HU)
Inventor: BORSOS FERENC
IPC: F16K5/00
Filed: 1985-09-20
Abstract: A találmány tárgya tömítés elrendezés hengeres csapforgóval ellátott csapok számára, amely a csapforgó és a csap háza között van elrendezve, mimellett a csapforgónak a csap nyitott állapotában a csap átömlönyílásával egytengelyű átömlőfurata van. A találmány szerinti megoldás lényege abban áll, hogy a tömitö elrendezés a csapforgó (3) és a ház (1) azt befogadó hengeres furata (2) között, az átömlöfurat (5) két oldalén szimmetrikusan van elhelyezve, mimellett a csapforgó (3) hengeres palástjában a tőmitó elrendezést befogadó, önmagába záródó horony (7) van kialakítva.  11 HU 198238 B A leírás terjedelme: 4 oldal, 1 rajz, 2 ábra -1-
Patent HU-188120-B (HU)
Title: Process for producing new peptides
Inventor: KITAURA YOSHIHIKO
IPC: A61P31/04
Filed: 1981-12-30
Abstract: A compound of the formula or its pharmaceutically acceptable salt: …<CHEM>… wherein R<1> and R<5> are hydrogen or certain substituents, R<2> is carboxy or protected carboxy, R<3> and R<4> are carboxy, protected carboxy or certain substituents with proviso that at least one of R<3> or R<4> is always carbamoyl, and processes for their preparation and also a pharmaceutical composition comprising as an ingredient the above compound.
Patent HU-197766-B (HU)
Title: Process for producing cell lines independent of serum
Inventor: WILSON ELAINE
IPC: C12R1/01
Filed: 1983-12-29
Abstract: The invention relates to new human cell lines which proliferate in the absence of serum or any exogenous macromolecular growth factor. The invention concerns especially the serum-independent Bowes II cell line and the proteins obtainable therefrom. The invention also provides a process for the production of said cell lines and said proteins. Said proteins are useful for the prophylactic and therapeutic treatment of the human body.
Patent HU-204861-B (HU)
Title: Process for producing solid catalyst component suitable for polymerization of alpha-olefins
Inventor: SATO AKIHIRO
IPC: C08F10/00
Filed: 1986-12-04
Abstract: A solid catalyst component which can produce a-olefin polymers having a high stereoregularity and a good powder fluidity, stably and with a good efficiency in gas phase polymerization, particularly in gas phase copolymerization, a catalyst for a-olefin polymerization using the above solid catalyst component and a process for producing the above catalyst component, are provided,
     which solid catalyst component is characterized in that it contains titanium as an active ingredient and is in the form of hollow fine particles, and   which process is characterized by adding a reaction product (I) of an organoaluminum compound (A) with an electron donor (B,) to TiCℓ 4  and reacting these under agitation in a baffle ratio of 0.35 or less with a power required for agitation of 2.50 KW/m 3  or less at a temperature of 0° to 70°C for a period of I to 10 hours and further reacting an electron donor (B 2 ) and an electron acceptor (E) with the resulting solid product (II) to obtain a solid product (III) i.e. the solid catalyst component.
Patent HU-208151-B (HU)
Title: Process for producing 11beta-phenyl-14beta-steroids and pharmaceutical compositions comprising same
Inventor: SCHOLZ STEFAN
IPC: C07J15/00
Filed: 1989-09-20
Abstract: PCT No. PCT/EP89/01090 Sec. 371 Date Mar. 20, 1991 Sec. 102(e) Date Mar. 20, 1991 PCT Filed Sep. 20, 1989 PCT Pub. No. WO90/03385 PCT Pub. Date Apr. 5, 1990.New 11 beta -phenyl-14 beta H-steroids of general formula (I), where Z is an oxygen atom or the hydroxyimino-grouping N DIFFERENCE OH, and M and N are either jointly a second compound or L is a hydrogen atom and M is an  alpha -permanent hydroxy group and either A and B together are a second compound and D is a hydrogen atom, where R1 is a five or six-part heteroalkyl residue or a cycloalkyl, cycloalkenyl or aryl residue or A is a hydrogen atom and B and D together are a methylene bridge, where R1 besides the aforementioned residues may be a possibly substituted hydrocarbon residue with up to 10 C atoms, a possibly substituted amino group, a hydroxy or C1-8 alkoxy, mercapto or thioalkyl group, R2 is a methyl or ethyl residue, and R3/R4 represents the usual combination of substituents on the C17 atom in steroid chemistry, having antigestagenic and other properties.