baber/WOPTO huggingface dataset:
Patent MX-167601-B (MX)
Title: "proceso para la recuperacion de aceites aislantes para transformadores electricos
Inventor: ARAUJO GUERRERO MARCO ANTONIO
IPC: H01F27/12
Filed: 1987-12-18
Abstract: La presente invención se refiere a un proceso para la recuperación de aceites aislantes para transformadores eléctricos a partir de aceites lubricantes de naturaleza nafténica, caracterizado porque comprende los pasos de: mezclar el aceite nafténico con una corriente de hidrógeno; hacer reaccionar la mezcla en presencia de un catalizador a presiones de 40 a 70 Kg/cm cuadrado y temperaturas de 300 a 420 grados C; separar la fase gaseosa rica en hidrógeno de la fase líquida que contiene el aceite lubricante hidrotratado; destilar el aceite para estabilizarlo y someterlo a un tratamiento con arcilla para eliminar las impurezas presentes en el aceite y filtrar para obtener el aceite aislante.
Patent NO-162465-B (NO)
Title: Substituerte imidazolinyl-pyridiner og -kinoliner og anvendelse derav som herbicide midler.
Inventor: LOS MARINUS
IPC: C07D405/14
Filed: 1981-06-01
Abstract: Det er tilveiebrakt nye 2-(2-imidazolin-2-yl)-pyridin-og -kinolin-forbindelser, en fremgangsmåte og mellomprodukt-forbindelser for fremstillingen derav, og en fremgangsmåte for å regulere en stor mengfoldighet av ettårig og flerårig plantearter dermed.En mer foretrukket gruppe av disse 2-(2-imidazolin-2-yl)pyridiner kan illustreres med formelen (Ia):. hvor B er hydrogen, CO-alkyl C-Cg eller CO-yA erhvor Rer som beskrevet for formel (I) ovenfor; X er hydrogen og Y og Z betyr hver hydrogen, CCg alkyl, C-C-alkoksy, halogen, C-C-halogenalkyl eller fenyl og, når de tas sammen, betyr YZ -(CH)-.De i formel (Ia) mest foretrukne 2-(2-imidazolin-2-yl)-yridin-forbindelser er slik hvori B, X, Y og Z hver er hA er COORog Rer som beskrevet for formel () ovenfor.
Patent NO-160245-B (NO)
Title: Katalysator og fremgangsmaate for fremstilling av hydrogengass fra karbonmonoksyd og vann.
Inventor: VENAELAEINEN TAPANI
IPC: B01J31/24
Filed: 1985-05-23
Abstract: Katalysator for fremstilling av hydrogengass fra karbonmonoksyd og vann og en fremgangsmåte til fremstilling av hydrogengass fra karbonmonoksyd og vann i nærvær av en katalysator. Katalysatoren fremstilles fra et gruppe VIII metallkarbonyl og en herocyklisk base. Gruppe VIII metallkarbonylet er Ru(CO), FeRUjICO) 12, Fe2Ru(CO) 12,. eller deres derivat M3(CO) 12-xljc' nor M er Ru eller Fe, x = 1 eller 2 og L er en trialkyl- eller triarylfosfin eller -fosfitt. Den hetrocykliske basen er 2,2'-bipyridin eller 1,10-fenantrolin.
Patent NO-169898-B (NO)
Inventor: LEE VING JICK
IPC: C07C327/58
Filed: 1987-07-07
Abstract: Intermediates useful for synthesis of cephalosporins are disclosed, which intermediates are concerned with 1,2,3-thiadiazole-4-thiolates and the preparation of such thiolates.
Patent NO-162898-B (NO)
Inventor: HAUGS AUDUN
IPC: B25B7/12
Filed: 1987-09-25
Abstract: PCT No. PCT/NO88/00071 Sec. 371 Date Apr. 26, 1990 Sec. 102(e) Date Apr. 26, 1990 PCT Filed Sep. 26, 1988 PCT Pub. No. WO89/02806 PCT Pub. Date Apr. 6, 1989.Pliers comprising a stationary pliers member (10) with associated first jaw member (11) and a moveable pliers member (12) with associated second jaw member (13). Jaw member (13) of the moveable pliers member is moveable towards and away from jaw member (11) of the stationary pliers member by means of an actuating handle (21) pivotable relative to the stationary pliers member (10). The second jaw member (13) is moveable towards the first jaw member (11) in a two-step movement, that is to say with a first movement with relatively long length of movement and with relatively little force by means of a first actuating means (17, 19) between the actuating handle (21) and the moveable pliers member (12) and with a second movement with relatively short length of movement and with relatively large force by means of a second actuating means (26) between the actuating handle (21) and the moveable pliers member (12).
Patent NO-173576-B (NO)
Inventor: LISLE RONALD JAY
IPC: G06F5/00
Filed: 1987-12-03
Abstract: A text compression method and apparatus are disclosed that enable overall compression ratios of more than six or eight to one for normal language text. Plural multiple-word dictionaries that are specialized for the particular field of use are employed together with a header transmission format that identifies which dictionaries are to be used. In addition, entries in these dictionaries are categorized by a weighted frequency of use ranking in which the product of the word length in characters and the frequency of occurrence of that word in the text is taken as the weighted figure of merit for ranking words to be placed in the individual dictionaries.
Patent SE-380042-B (SE)
Inventor: KRONISH D P
IPC: C12M1/34
Filed: 1970-04-17
Abstract: 1,266,274. Microbiological heating. WARNERLAMBERT CO. April 9, 1970 [April 17, 1969], No. 16962/70. Heading C6F. A diagnostic reagent for the identification and differentiation of Staphylococci e.g. as between S. aureus and S. epidermis is based on mannitol fermentation and coagulase detection, and consists of a bibulous material containing in one form or another (i) a composition comprising a nutrient capable of supporting the growth of microorganisms, D-mannitol and a chemical indicator which produces a colour change in the presence of acid degradation products which are formed by the fermentation of mannitol, and (ii) a coagulable material from which substantially all glucose has been removed. A test strip may have 6 zones viz. A the coagulase detection composition (ii) applied on a dextran coating, B hydrophobic barrier, C the mannitol fermentation composition (i), D a second hydrophobic barrier, E untreated and F impregnated with an identifying dye (specified). Alternatively, composition (ii) can be superimposed on composition (i) in a single first zone. Composition (i) typically includes D-mannitol (or D, L-mannitol), beef extract, protein hydrolysate, sodium chloride, a thickening agent, especially dextran, and an indicator such as phenol red, brom thymol blue or brom cresol purple. The coagulable material may be lyophilized human plasma (or rabbit plasma) or fibrinogen, freed from glucose by dialysis. The hydrophobic barrier is preferably polymerized methyl methacrylate.
Patent SE-377153-B (SE)
Inventor: BROCKHAUS E
IPC: E05D7/10
Filed: 1972-04-26
Abstract: 1370256 Door hinge ED SCHARWACHTER KG 3 May 1972 [10 May 1971] 20624/72 Heading E2F A door hinge comprising a first hinge part 7 with an eye 6 and a second hinge part having arms 1, 2 with eyes 5 at either side of and coaxial with the eye 6, has a hinge pin 4 with at least two radially extending protruberances which on insertion of the pin into the hinge cause distortion of the internal surface of the eyes. Thus the pin is prevented from radial displacement. The pin has radially extending corners 26 formed between an end surface 14 and an elongated slot 27, and, on the side of the pin diametrically opposite to the corners, radial hump-shaped parts 21, 23, the part 21 which is further forward in the direction of insertion of the pin being of less radial extent than the part 23. On insertion the part 21 produces a groove 25 in the softer material of the eyes 5, and is finally supported by outside surface 12 of the arm 2. The part 23 deepens the groove and the corners penetrate the material of the eye 5 in the arm 1. In a modification, Fig. 5, (not shown), the end surface 14 is provided with a number of radial protruberances (29) formed by the corners of elongated slots (30) one only of which extends the entire length of the pin. The hinge pin 4 may be provided with a coating of plastics material, at least in the region of the eye 6.
Patent YU-47128-B (YU)
Title: Uredjaj za sferno oblikovanje staklenih ploča
Inventor: VANASCHEN L
IPC: C03B35/14
Filed: 1989-06-29
Abstract: UREDJAJ ZA SFERNO OBLIKOVANJE STAKLENIH PLOČA, prema kome se staklena ploča postavlja na kraj transporterasa valjcima 2 koji prolazi kroz tunelsku peć i izlazi na drugom kraju a zatim se nakon dostizanja temperature sfernog oblikovanja, ploča prenosi fleksibilnom transportnom trakom 8, 28 do prvog uredjaja za transport a zatim do sklopa za sfero oblikovanje koji se sastoji od bar jednog gornjeg kalupa 3 zasferno oblikovanje koji ploču prihvata usisavanjem a zatim je diže i sferno oblikuje u željeni oblik nakon čega se ploča prenosi prstenastim okvirom 26 do stanice za hladjenje odnosno termičko kaljenje, naznačen tim e, što se transport staklene ploče od peći do sklopa za sferno oblikovanje izvodi reverzibilnim pomeranjem koje je paralelno sa pravcem F2 kretanja staklene ploče od prednjeg dela fleksibilne transportne trake (8, 28) koji je postavljen izmedju donjeg dela transportera sa valjcima (2) i sklopa za sferno oblikovanje do zadnjeg dela trake (8, 28) koji se nalazi ispod ravni transportera sa valjcima (2). Prijava sadrži još 1 nezavisan i 13 zavisnih zahteva.
Patent YU-46428-B (YU)
Title: Trajni zaštitnik induktora indukcionih peći
Inventor: MARINKO MARINKOVIC
IPC: C22B4/08
Filed: 1987-10-09
Abstract: TRAJNI ZAŠTITNIK INDUKTORA INDUKCIONIH PEĆI, gde navojni sloj 9 naleže na vatrostalno dno 13 o obodnu azbestnu oblogu 8 a ova na liskunski sloj 5 oko koje je postavljena zaštitna mrežica 4 obložena s druge strane liskunnskim slojem 3 a ovaj tankim betonskim slojem 2, naznačen time, što je izmedju azbestne obloge (8) i liskunskog sloja (5) izliven betonski sloj (7) sa integralno izvedenim sigurnosnim prstenom (7a) a izmedju betonskog sloja (7) i liskunskog sloja (5) postavljen azbestni sloj (6), pri čemu sigurnosni prsten (7a) prekriva sa gornje strane tanki vatrostalni sloj (2) oba liskunska sloja (3) i (5) i zaštitnu mrežicu (4) i što je mrežica (4) sa gornje strane električno povezana sa izvodom (10) koji je provučen kroz šamotnu opeku (11) i plašt (12).
Patent RS-49749-B (RS)
Inventor: NAGEL JUERGEN
IPC: B65D83/14
Filed: 2000-05-24
Abstract: Kanister (1) koji sadrži formulaciju aktivne supstance koja sadrži so, kiselinu, bazu ili elektrolite sa TG 134a i/ili TG 227 kao pogonski gas za terapijsku inhalaciju, se sastoji od posude (2) i ventilskog poklopca (8) sa ventilom (9) koji je smešten u njemu, naznačen time, što je posuda napravljena od legure sa udelom gvožđa od 40,0 – 53,0 %, nikla 23,0 – 28,0 %, hroma 19,0 – 23,0 %, molibdena 4,0 – 5,0 %, mangana 0,0 – 2,0 %, bakra 1,0 – 2,0 %, silicijuma 0,0 – 1,0 %, fosfora 0,0 – 0,045 %, sumpora 0,0 – 0,035 %, i ugljenika 0,0 – 0,020 %. Prijava sadrži još 27 zahteva.
Patent ZA-804765-B (ZA)
Title: Reclosable bags, apparatus and method
Inventor: TILMAN P
IPC: B31B23/00
Filed: 1980-08-06
Abstract: Bag forming material is obtained by feeding sheet material (2) together with male and female closure elements (5, 6) to a nip between guide roller (3) and pressure rollers (9, 10) at which adhesive is applied from nozzles (11, 12). The resulting material is fed to an accumulator (16) on a continuous basis and then intermittently over a forming shoulder (21) into a tubular form (22) while maintaining the closure elements (5, 6) at a predetermined distance apart before the forming shoulder (21) by means such as grooves (19) in guide roller (18) and locating the closure elements (5, 6) in predetermined positions facing each other downstream of the shaping shoulder by suitable means (23) which may include rotatable guide elements. The material is drawn through the apparatus by transverse reciprocating sealing bars (26) and a pilfer proof closure can be provided by vertical sealing bars (25).
Patent ZA-815924-B (ZA)
Title: Extraction process for the selective removal of cobalt (ii) from aqueous solutions
Inventor: RICKELTON WILLIAM ANDREW
IPC: C22B3/00
Filed: 1981-08-26
Abstract: The invention relates to novel organic phosphinic acid compounds of the formula <CHEM> wherein R1 is 2,4,4-trimethylpentyl and R2 is 2,4,4-trimethylpentyl or cyclohexyl, and their use for the extraction of metals.
Patent ZA-826087-B (ZA)
Title: Copolymers of alpha-beta-unsaturated dicarboxylic acid esters,methods for their production and their use as lubricants for processing plastics
Inventor: BECK HEINZ
IPC: C08F8/14
Filed: 1982-08-20
Abstract: 1. Claims for the Contracting States : BE, CH, FR, GB, IT, LI, NL Copolymers for alpha,beta-unsaturated dicarboxylic acid esters with alpha-olefins, characterized in that they consists of alpha-olefins containing from 8 to 24 C-atoms and of alpha,beta-unsaturated dicarboxylic acid esters of which the alcohol component is an ethoxylated al-cohol having a degree of ethoxylation of from 1 to 45. 1. Claims for the Contracting State : AT A process for producing copolymers of alpha,beta-unsaturated dicarboxylic acid esters with alpha-olefins, characterized in that alpha-olefins containing from 8 to 24 C-atoms and alpha,beta-unsaturated dicarboxylic acid anhydrides or alpha,beta-unsaturated dicarboxylic acids are copolymerized in an inert gas at 80 to 210 degrees C in the presence of a peroxide catalyst and then esterified with ethoxylated alcohols having a degree of ethoxylation of from 1 to 45 in a molar ratio of alpha,beta-unsaturated dicarboxylic acid (or anhydride) to ethoxylated alchol of from 1 : 1 to 1 : 2.
Patent ZA-849460-B (ZA)
Title: Lobe rotor pumps
Inventor: ELLIS GEORGE WILLIAM
IPC: F16D1/02
Filed: 1984-12-05
Abstract: A lobe rotor pump including a casing (10) and two lobe rotors (16, 18) the rotors each having, coaxial with its axis of rotation, an axially extending cylindrical sleeve (20, 22) formed integrally therewith. A seal (33-37) is mounted in a fluidtight manner within the casing (10) and seals against the outer cylindrical surface of the sleeve. A blind bore (21, 23), which is closed at the rotor end, (24, 25) has therewithin a drive shaft (28, 30) and retaining means (42 to 57) are provided to hold the sleeve and the rotor on the drive shaft with the drive connection engaged, said retaining means being located on the side of the seal (33-37) remote from the rotor.
Patent ZA-851351-B (ZA)
Title: Process and device for drying of coated work pieces through infrared radiation
Inventor: BERKMANN ADOLF
IPC: B05C9/14
Filed: 1985-02-22
Abstract: PCT No. PCT/EP85/00066 Sec. 371 Date Oct. 24, 1985 Sec. 102(e) Date Oct. 24, 1985 PCT Filed Feb. 22, 1985 PCT Pub. No. WO85/03766 PCT Pub. Date Aug. 29, 1985.The present invention relates to a process for drying coated workpieces, particularly workpieces of irregular shape, by infrared radiation and to an apparatus for carrying out this process. The present invention can be used for drying castings, particularly those having an irregular shape, thin-walled sheet-metal products as well as ceramic and glass products which have been coated with a powder or an electro-dipping varnish or water-soluble or solvent-containing varnishes. According to said process the workpieces are dried by infrared radiation in several zones at a specific temperature, an air flow being provided in the zones and the air being drawn off from one zone. According to the present invention the workpieces are preheated in the first preheating zone. In the second rest zone the infrared radiation is interrupted so that the temperature of the workpieces slightly decreases. In the third reheating zone the workpieces are completely dried by subjecting them once more to infrared radiation while the air is circulated and heat is additionally supplied to the workpieces by convection. The apparatus comprises a casing, wherein infrared emitters having reflectors are disposed in several zones at intervals from the casing walls, the emitters encompassing an irradiation space. The apparatus also has inlet and outlet openings and a means for conveying the workpieces through the casing and a suction device. According to the present invention a rest zone without any infrared emitters is disposed between a preheating zone and a reheating zone. The suction device in the rest zone is so disposed that the air is circulated within the casing.
Patent ZA-858975-B (ZA)
Title: Shackle mechanisms
Inventor: BELLINGHAM RONALD SIDNEY
IPC: F41B15/00
Filed: 1985-11-22
Abstract: An "arrest" handcuff has the usual ratchet and pawl mechanism for closing the wrist aperture. In order to deadlock the pawl (10) a runner (16) is shifted by means of a manual push-button (22) extending from the back face of the runner so that a stump (19) on the runner then overlies the nose (23) of the pawl. To release the deadlocking and pivot the pawl clear of the ratchet the runner (16) must be shifted to the left, which movement is normally blocked by a lever pack (25) operating on the runner stump (21). A correct key, however, can lift the levers and turn the runner back. If the option to deadlock the pawl is not taken up in any particular arrest situation the pawl still remains engaged with the ratchet under its spring bias (13) and the correct key is still needed to perform a leftward movement of the runner to lift the pawl from the ratchet.
Patent ZA-902559-B (ZA)
Title: Interphenylene 7-oxabicycloheptyl substituted heterocyclic amide prostaglandin analogs useful in the treatment of thrombotic and vasospastic disease
Inventor: MISRA RAJ NARAIN
IPC: A61K31/415
Filed: 1990-04-03
Abstract: Interphenylene 7-oxabicycloheptane substituted prostaglandin analogs are provided which are useful in treating thrombotic and vasospastic disease and have the structural formula <CHEM>  wherein  m is 1, 2 or 3;  n is 0, 1, 2, 3 or 4; Y is O, vinyl or a single bond, with the proviso that when n is 0, Y is a single bond; R is CO2H, CO2alkali metal, CO2lower alkyl, CH2OH, CONHSO2R<3>, CONHR<3a> or 5-tetrazolyl, with the proviso that when R is 5-tetrazolyl, n is other than 0;  X is O, S or NH; R<1> is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl, saturated heterocycle, saturated heterocyclicalkyl, aromatic heterocycle, aromatic heterocyclicalkyl or amido; each optionally substituted with an alkyl, aryl, cycloalkyl, or cycloalkylalkyl; and R<2> is hydrogen, lower alkyl, aryl, or aralkyl, or R<1> and R<2> together with the N to which they are linked form a 5- to 8- membered ring; R<3> is lower alkyl, aryl or aralkyl and R<3a> is hydrogen, lower alkyl, aroyl or aralkyl.
Patent ZA-907280-B (ZA)
Title: Water-based autoxidisable coating composition
Inventor: TAYLOR PHILIP LOUIS
IPC: C08F8/14
Filed: 1990-09-12
Abstract: A water-based autoxidisable coating composition, especially a gloss or partial gloss coating composition (eg paint, varnish, woodstain or timber preservative) suitable for application at ambient temperatures which comprises water, minimal organic cosolvent and a partially esterified carboxylic acid film-forming copolymer at least partially neutralised by monovalent cations wherein the copolymer contains added 3-allyloxy-2-hydroxypropyl groups or certain analogues derived from addition of allyl glycidyl ether or certain of its analogues to carboxylic acid groups, in a copolymeric backbone portion derivable from a prepolymer of weight average molecular weight less than 30 000. The partially esterified copolymer has an acid value of 25 to 60 and preferably a dynamic solution viscosity of 1 to 500 Pa.sec measured in 1-methoxy-2-hydroxy propane by oscillatory parallel plate rheometer. The coatings lap well, dry quickly and achieve acceptable water resistance. Also the optionally unneutralised copolymer and the coating composition when containing a minor amount of particulate copolymer which is found to improve gloss. Discolouration on ageing may be improved by neutralising with Group 1 metal cations.
Patent ZA-912617-B (ZA)
Title: Flexible razor head
Inventor: CHEN EVAN N
IPC: B26B21/40
Filed: 1991-04-09
Abstract: A flexible razor head is provided which features a flexible cap and seat. Corrugations, having portions (55,59) of different widths, present in the seat enhance the ability of the seat to lengthen in response to shaving forces. <IMAGE>   <IMAGE>
Patent ZA-913131-B (ZA)
Title: Container
Inventor: LOMBARDI MICHAEL HENRY
IPC: A45D40/00
Filed: 1991-04-25
Abstract: A Saturn-shaped container is provided which includes a receptacle forming a lower portion of the container, a lid forming an upper portion of the container, a ring member surrounding the receptacle and supporting the lid, and a seal member positioned between receptacle and lid so as to define a first and second compartment within the container. Advantageously, the lid is transparent and may serve as a magnifying means for viewing contents within the container.
Patent ZA-917606-B (ZA)
Title: Pharmaceutical azagranatane derivatives
Inventor: KING FRANCIS DAVID
IPC: A61K31/495
Filed: 1991-09-24
Abstract: Compounds of formula (I) wherein X is a phenyl group or a monocyclic 5 or 6 membered heteroaryl group, either of which group is optionally fused to a saturated or unsaturated 5-7 membered carbocyclic or heterocyclic ring; A is linking moiety; Z is C1-6 alkyl, C3-8 cycloalkyl, C3-8 cycloalkyl C1-4 alkyl, phenyl, naphthyl, phenyl C1-4 alkyl or naphthyl C1-4 alkyl wherein a phenyl or naphthyl moiety is optionally substituted by one or more of halo, C1-6 alkoxy or C1-6 alkyl; R is hydrogen or methyl having 5-HT3 receptor antagonist activity.
Patent ZA-925085-B (ZA)
Title: Gellan gum for non-brittle gels
Inventor: CHANG HELENA C
IPC: C12P19/04
Filed: 1992-07-08
Abstract: A partially deacylated gellan gum capable of forming elastic gels having low brittleness, and a process for its preparation.
Patent ZA-941544-B (ZA)
Title: Crystalline cyclodextrin complexes of ranitidine hydrochloride, process for their preparation and pharmaceutical compositions containing the same.
Inventor: FISCHER WILFRIED
IPC: A61K31/34
Filed: 1994-03-04
Abstract: PCT No. PCT/EP94/00645 Sec. 371 Date Dec. 15, 1995 Sec. 102(e) Date Dec. 15, 1995 PCT Filed Mar. 4, 1994 PCT Pub. No. WO94/20091 PCT Pub. Date Sep. 15, 1994The present invention relates to cyclodextrin inclusion complexes of ranitidine hydrochloride which exhibit a novel, to date unknown crystalline structure, being significantly different from those of known "Form 1 and 2" and to the preparation of such inclusion complexes. The inclusion complexes are prepared from aqueous common solution or suspensions of ranitidine hydrochloride and cyclodextrin by removal of water. As complexing agents  alpha -,  beta - and gamma-cyclodextrins, their alkylated, hydroxy alkylated derivates or their suitable mixtures are utilized. Finally, the invention concerns pharmaceutical compositions comprising the new complexes.
Patent ZA-947014-B (ZA)
Title: Tricot nonwoven fabric
Inventor: SUEHR SUSAN LYNN
IPC: B23K26/38
Filed: 1994-09-12
Abstract: A nonwoven fabric of entangled fibers defining a predetermined pattern of openings with the fabric having excellent draping characteristics.
Patent ZA-976562-B (ZA)
Title: Isobutylgaba and its derivatives for the treatment of pain.
Inventor: SINGH LAKHBIR
IPC: A61K31/195
Filed: 1997-07-23
Abstract: The instant invention is a method of using certain analogs of glutamic acid and gamma-aminobutyric acid in pain therapy.
Patent GB-2342353-B (GB)
Title: Fluorinated triazine monomers and polymers providing oil- and water-repellency
Inventor: WILLIS COLIN
IPC: C08F246/00
Filed: 1998-07-16
Granted: 2001-10-03
Abstract: A compound of formula (I), wherein R1 and R2 are independently selected from saturated fluorocarbon substituted side chains, such as NR5(CH2)nCmF2m+1, O(CH2)nCmF2m+1, S(CH2)nCmF2m+1, NR5S(O)2(CH2)pCmF2m+1, or CR5[CO2(CH2)nCmF2m+1]2, where R5 is hydrogen or alkyl, n and m are independently an integer of 1-12, and p is 0 or an integer of 1-12, R3 is an unsaturate moiety which may be polymerised, and X is O, S or NR4 where R4 is hydrogen or alkyl, as well as methods for the preparation of these compounds. Compounds of formula (I) are useful monomers in the preparation of oil- and water-repellent polymers.