baber/WOPTO huggingface dataset:
Patent DE-112016000637-B4 (DE)
Title: Elektrische Antriebsvorrichtung und elektrische Servolenkvorrichtung
Inventor: FUJIMOTO MASAO
IPC: H05K1/14
Filed: 2016-01-29
Granted: 2021-07-22
Abstract: Elektrische Antriebsvorrichtung, die durch einen Elektromotor zum Antreiben eines mechanischen System-Steuerelements und eine elektronische Steuereinheit gebildet ist, die gegenüber einer Ausgangswelle des Elektromotors angeordnet ist und zum Steuern des Elektromotors konfiguriert ist, wobei die elektronische Steuereinheit mit einem ECU-Gehäuse (11B), das mit einem Motorgehäuse (11A) verbunden ist, in dem der Elektromotor untergebracht ist, und einer elektronischen Steueranordnung versehen ist, die im ECU-Gehäuse (11B) zum Antreiben und Steuern des Elektromotors untergebracht ist,wobei die elektronische Steueranordnung in eine Stromversorgungsschaltungseinheit (14) mit einer Hauptfunktion, die eine Stromversorgung erzeugt und auf einem Metallsubstrat (17) montiert ist, eine Stromumwandlungsschaltungseinheit (15) mit einer Hauptfunktion, die den Elektromotor antreibt und auf einem Metallsubstrat (18) montiert ist, und eine Steuerschaltungseinheit (16) mit einer Hauptfunktion unterteilt ist, welche die Stromumwandlungsschaltungseinheit (15) steuert und auf einem Harzsubstrat (31) montiert ist,dadurch gekennzeichnet, dass zumindest ein Stromversorgungsverbinder-Verdrahtungselement, das elektrischen Strom von derStromversorgungsschaltungseinheit (14) der Stromumwandlungsschaltungseinheit (15) und der Steuerschaltungseinheit (16) zuführt und einSignalübertragungsverbinder-Verdrahtungselement, das in die Steuerschaltungseinheit (16) einzugebende oder aus dieser auszugebende Signale überträgt, in eine Verbinderanschlussanordnung (12) aus synthetischem Harz eingebettet sind, und dass Verbinderanschlüsse (34, 35, 36, 37, 38, 39) des Stromversorgungsverbinder-Verdrahtungselements und des Signalübertragungsverbinder-Verdrahtungselements, die aus der Verbinderanschlussanordnung (12) freiliegen, direkt mit entsprechenden Verbindern (22, 23, 28, 24, 33E) der Stromversorgungsschaltungseinheit (14), der Stromumwandlungsschaltungseinheit (15) und der Steuerschaltungseinheit (16) verbunden sind.
Patent DE-112016005433-B4 (DE)
Title: Gasturbine und bauteiltemperatur-einstellverfahren dafür
Inventor: TAKAMURA KEITA
IPC: F02C7/18
Filed: 2016-11-25
Granted: 2022-07-21
Abstract: Eine Gasturbine (1;1a;1b;1c;1d;1e;1f;1g) umfassend:einen Verdichter (10), der eine Vielzahl von Verdichterstufen (19) umfasst und ausgestaltet ist, um Luft sequentiell an jeder der Verdichterstufen (19) zu verdichten,eine Brennkammer (20), die ausgestaltet ist, um einen Brennstoff (F) in Luft (A), die durch den Verdichter (10) verdichtet worden ist, zu verbrennen, um ein Verbrennungsgas (G) zu erzeugen,eine Turbine (30), die einen Turbinenrotor (31), der vorgesehen ist, um durch das Verbrennungsgas (G) um eine Achse (Ar) gedreht zu werden, ein rohrförmiges Turbinengehäuse (41), welches den Turbinenrotor (31) abdeckt, und eine Vielzahl von Leitschaufelreihen (46), welche an einer Innenumfangsseite des Turbinengehäuses (41) befestigt sind, umfasst,eine Entnahmeleitung (61;61a), die vorgesehen ist, um durch diese die verdichtete Luft von einer Zwischenverdichterstufe (19a) aus der Vielzahl von Verdichterstufen (19) als eine Entnahmeluft zu entnehmen und die Entnahmeluft zu einem ersten Bauteil (44), das einen Abschnitt des Turbinengehäuses (41) ausgestaltet, einzuführen, undeine Bauteileinführungsleitung (66;66a;66e), die vorgesehen ist, um durch diese die Entnahmeluft, die das erste Bauteil (44) durchströmte, in ein zweites Bauteil von den Bauteilen, welche die Turbine (30) ausgestalten, welches sich von dem ersten Bauteil (44) unterscheidet, einzuführen,wobei ein erster Luftströmungsweg (65;65b;65f), der sich in einer Axialrichtung (Da), in welcher sich die Achse (Ar) erstreckt, und durch welche die Entnahmeluft von der Entnahmeleitung (61;61a) strömen kann, erstreckt, in dem ersten Bauteil (44) ausgebildet ist,wobei das zweite Bauteil ein Niederdruckbauteil (34;47) ist, welches in einer Druckumgebung, deren Druck niedriger als ein Druck der verdichteten Luft an einem Auslass der Zwischenverdichterstufe (19a) ist, angeordnet ist, undwobei ein zweiter Luftströmungsweg (34p;47p), durch welchen die Entnahmeluft von der Bauteileinführungsleitung (66;66a;66e) strömen kann, in dem Niederdruckbauteil (34;47) ausgebildet ist,wobei die Gasturbine (1;1a;1b;1c;1d;1e;1f;1g) so ausgestaltet ist, dass in einem ersten Luftkühlungsschritt die Entnahmeluft, die durch das erste Bauteil (44) strömt, in ein Wiederverwendungsrohr (67) einströmt, wobei ein erstes Ende des Wiederverwendungsrohres (67) mit dem ersten Bauteil (44) verbunden ist und ein zweites Ende des Wiederverwendungsrohres (67) mit dem Turbinengehäuse (41) von der Außenseite des Turbinengehäuses (41) verbunden ist.
Patent CZ-286291-B6 (CZ)
Title: Process of making tube connection
Inventor: IMGRAM FRIEDRICH
IPC: B29K23/00
Filed: 1992-08-21
Abstract: When making connection of tubes according to the present process and consisting of a tube (3) end (4) of crosslinked polyolefin and a connecting part (1), the polyolefin tube (3) end (4) with deformation and inside diameter less than the connecting part (1) outside diameter is first enlarged by making use of an expanding arbor at room temperature to inside diameter being greater than the connecting part (1) outside diameter. After removal of the expanding arbor the enlarged tube (3) end (4) is put on the connecting part (1) and than are fixedly and tightly coupled with each other so that crosslinked polyethylene tube (3) end (4) is automatically shrunk at ambient temperature.
Patent CZ-284288-B6 (CZ)
Inventor: AUTRATA RUDOLF PROF DRSC ING
IPC: H01J37/244
Filed: 1997-03-13
Abstract: Detekční systém rastrovacího elektronkového mikroskopu s odděleným tubusem od vzorkové komory /11/ pomocí diferenciální komory /2/ sestává z monokrystalického scintilátoru /6/ s aperturní clonou /9/ rozděleného na dvě poloviny, který je na bázi podvojných yttritohlinitých oxidů nebo na bázi ytritých silikátů aktivovaných trojmocným cérem a má ve svém středu kónický průchozí otvor /46/ jehož menší základna je na straně přivrácené k dopadu svazku primárních elektronů /33/ a tvoří aperturní clonu /9/. Tento kónický otvor /46/ je opatřen na stykových plochách obou polovin reflexní kovovou vrstvou /37/ a na vnitřní ploše reflexní vrstvou /34/ dielektrika a těžkého kovu. Monokrystalický scintilátor /6/ je umístěn mezi pravým a levým světlovodem /18, 19/ ve vzorkové komoře /11/ nad vzorkem /10/. Od vnějšího dna /3/ diferenciální komory /2/ je oddělen těsněním /45/ a ze strany uložení vzorku /10/ je opatřen kruhovým elektrodovým systémem /7/, sestávajícím nejméně ze dvou elektrod /27, 28/, symŕ
Patent SK-281819-B6 (SK)
Title: New mixtures of herbicides and antidotes
Inventor: WILLMS LOTHAR
IPC: A01N47/36
Filed: 1994-09-19
Abstract: Herbicide-safener combinations comprising A) at least one herbicidal active substance from the group of the substituted phenylsulfonylureas of the formula (A) and salts thereof;    <IMAGE>  (A)   in which R1-R4, W, X, Y, Z and Hal are as defined in claim 1, and B) at least one compound of the formulae (B1) and (B2)    <IMAGE>  (B1)   <IMAGE>  (B2)   in which X', W', Z' R* and n' are as defined in claim 1, are suitable as selective herbicidal compositions for use in crop plants, for example in maize, rice, wheat, barley etc.
Patent CZ-282439-B6 (CZ)
Inventor: FRANZ KLAUS-DIETER DR
IPC: C09C1/00
Filed: 1992-06-26
Abstract: Povrchově modifikované pigmenty na bázi šupinkovitých substrátů, které jsou povlečeny vrstvou  dioxidu titaničitého a na ní se nacházející tenkou vrstvou z titanátu kovu alkalických zemin,  jsou pro zvýšení světlostálosti a snížení reaktivity povrchu vůči organickým sloučeninám,  vyžíhány při teplotách alespoň 800 .sup.o.n.C.ŕ
Patent CZ-285116-B6 (CZ)
Inventor: BINGER MARY-HELEN
IPC: C07K5/08
Filed: 1992-07-10
Abstract: Komplexní soli hematoporfyrinu a jeho derivátů obecného vzorce I, v němž R.sup.1 .n.a R.sup.2 .n.nezávisle na sobě znamenají-CH=CH.sub.2.n., -CH(OH)-CH.sub.3 .n.nebo CH(OR.sup.3.n.)-CH.sub.3.n., kde R.sup.3 .n.znamená skupinu sestávající z jedné až pěti jednotek odvozených od monomeru vzorce II, nebo znamenají stejnou skupinu (CH(R.sup.4.n.)-CH.sub.3.n., kde R.sup.4 .n.znamená karboxymethylaminovou, 1-karboxypentylaminovou, 1-karboxy-2-methylpropylaminovou, 1-karboxy-3-methyl-butylaminovou, 1-karboxy-2-methyl-butylaminovou, 1-karboxy-butylaminovou,1-karboxy-pentylaminovou, 1-karboxy-2-hydroxyethylaminovou, 1-karboxy-2-2-hydroxy-propylaminovou, 1-karboxy-2-merkapto-ethyl-aminovou, 1-karboxy-3-methylthio-propylaminovou, 1,2-dikarboxy-ethylaminovou, 1-karboxy-2-karbamoyl-ethylaminovou, 1,3-dikarboxy-propylaminovou, 1-karboxy-3-karbamoyl-propylamynovou, 1-karboxy-2-fenyl-ethylaminovou, 1-karboxy-2-(4-hydroxyfenyl)-ethylaminovou, 1-karboxy-2-indolyl-ethylaminovou, 2-ŕ
Patent CZ-281954-B6 (CZ)
Title: Absorption article, such as sanitary pad or a pad used during incontinence
Inventor: WIDLUND URBAN
IPC: A61F13/472
Filed: 1991-10-31
Abstract: PCT No. PCT/SE91/00736 Sec. 371 Date Apr. 23, 1993 Sec. 102(e) Date Apr. 23, 1993 PCT Filed Oct. 31, 1991 PCT Pub. No. WO92/07537 PCT Pub. Date May 14, 1992.The invention relates to an absorbent article, such as a sanitary napkin or an incontinence guard intended to be worn in the crotch part of a pair of underpants (9), and comprising an elongated absorbent pad (3) which is enclosed in a casing (1, 2) and which has attached to both long side edges (6, 7) flexible flaps (4, 5) which are intended to be folded around the leg edges (10, 11) of the underpants (9) in use, so as to prevent soiling of the underpants. An inventive article is mainly characterized in that each flap (4, 5) has an edge part which coincides generally with a corresponding edge part on the article casing (1, 2), and in that the flaps (4, 5) and the casing (1, 2) are mutually joined within the mutually coincidental edge parts (12, 13), with the flaps (4, 5) extending inwardly over the absorbent pad (3).
Patent CZ-285746-B6 (CZ)
Title: Bituminous foil or band covering material
Inventor: HOLBEK JOHN
IPC: B32B43/00
Filed: 1990-09-11
Abstract: A bituminous coating sheet has on one side a heat-activatable, surface layer optionally covered by a plastic film. The adhesive layer is formed with a pattern of parallel grooves sepd by unbroken ridges, the spacing of adjacent grooves being not more than 10 mm, pref 1 to 5 mm. The grooves pref have a height of 0.5-6 mm, esp 1-3 mm, as measured from the bottom of the groove, and extend in the longitudinal direction. The plastic film may have a thickness of 3-30 microns. When applying the sheet to a support surface the sheet is heated to decompose the plastic and activate the adhesive; heating may be effected by a flameless hot air stream.
Patent CZ-281248-B6 (CZ)
Inventor: BAUER JURGEN
IPC: B60T13/52
Filed: 1990-10-10
Abstract: Podlatkový posilovač brzd má svůj ventilový píst  (16) tvořen nastavovací objímkou (26) axiálně  dosedající na převodový kotouč (6), a přední  částí (24), která je ve styku s pístní tyčí  (13), přičemž nastavovací objímka (26) je s  ventilovým pístem (16) spojena závitovým  spojením (31,32) a je vedena v tělese (10)  řídícího ventilu a zajištěna proti otáčení  prostřednictvímm axiální drážky (34), do které  zasahuje můstek (35) upravený v tělese (10)  řidícího ventilu.ŕ
Patent CZ-281216-B6 (CZ)
Inventor: OETIKER HANS
IPC: B60K17/22
Filed: 1990-11-22
Abstract: Zařízení zahrnuje protizávaží (40) předem určené velikosti a hmotnosti, a svěrku uzpůsobenou pro upnutí okolo vnějšího obvodu otáčivé součástky (60) s protizávažím v předem určené poloze, při přesné fixaci této polohy, vůči obvodu otáčivé součástky (60). Svěrka ve formě otevřeného svěrného pásku (10) se vzájemně mechanicky spojenými volnými konci obsahuje podélně pružnou část zahrnující nejméně jednu pruživou sekci (20) s vybráním v plochém tělese svěrného pásku (10). V místě vzájemného spojení volných konců svěrného pásku (10) je ke svěrce připojeno protizávaží (40), tvořící spolu s hmotností spojovacích prvků mezi volnými konci svěrného pásku (10) sestavu protizávaží, odpovídající kompenzaci nevyváženosti v otáčivé součástce (60).
ŕ
Patent CZ-293856-B6 (CZ)
Title: Supporting section for mounting a drive mechanism for controlling roller shutter
Inventor: BLACHUT BOHUMIR ING
IPC: E06B9/17
Filed: 1999-04-22
Abstract: The present invention relates to a supporting section for mounting a drive mechanism (4) for controlling a roller shutter wherein the section consists of a molded longitudinal cover strip (11) being provided with arresting and retention elements for attaching to a frame (6) and for insertion on and location of a casing (3) with a drive mechanism (4). Said cover strip (11) is made in the form of a side-open trough with a lid (12) fastened detachably to the front face thereof in order to form a closed interior (13). Said cover strip (11) horizontal upper wall (111) is followed up, at the free end thereof, with a vertical attachment surface (112) being provided at its end with an obliquely extending retention surface (113) that is formed along the entire length thereof, wherein a stepped recess (114) is formed on outer side of a break between said attachment surface (112) and said retention surface (113). Said cover strip (11) horizontal bottom wall (116) is provided at its free end with an elongate anchor element (117).
Patent CZ-294476-B6 (CZ)
Title: Filter cigarette and process for producing thereof
Inventor: TEUFEL EBERHARD
IPC: A24D3/10
Filed: 1996-10-31
Abstract: In the present invention, there is disclosed a filter cigarette, whose filter a) contains fibrous filter material, b) contains an additive with an antimutagenic action on the cigarette smoke in a quantity of less than 15 percent by weight, based on the fiber weight of the filter and c) on smoking a similar unventilated filter cigarette, but not containing additive, has a nicotine retention RiN (in percentage) (determined according to CORESTA recommended method No. 9) satisfying the following formula: RN is greater than or equal to 100*(1-D) in which: D=exp(A*B+C),with A = 21 mm -filter length in mm for filter lengths smaller than or equal to 25 mm or A= -4 mm for filter lengths being longer than 25 mm, B = 9.3*10e-3(1/mm) and C = -(de4* {DELTA}p*K+L) wherein d = filter diameter (mm), {DELTA}p represents draw resistance of the filter (mm hydraulic pressure), K = 1.0228*10e-6 (1/(mme4*mm hydraulic pressure)) and L = 0.2334. Using said filter and measured according to the Ames test with strain TA 98, it is possible to filter mutagenically acting substances with a selectivity of at least 10 percent better than other smoke ingredients, wherein when smoking a similar, not ventilated filter cigarette with a tobacco roll of a check cigarette, the CORESTA method No. 2 is used. Described is also a particularly suitable method for the manufacture of such a filter cigarette, which method comprises applying additive to a filter of fibrous filter material, particularly in the form of cellulose acetate in a mixture with a softener, particularly in the form of glycerol triacetate.
Patent CZ-293376-B6 (CZ)
Title: Connecting anchor
Inventor: MALLEE RAINER DR
IPC: F16B13/14
Filed: 1999-05-28
Abstract: The invented connecting anchor (1) with a threaded section (8) lying outside a borehole (2) can be anchored by means of mortar material within a borehole (2) and has attachment means (5) forming a connecting region within the borehole (2). The attachment means (5) are arranged on the connecting anchor (1) at mutual distance apart from each other, whereby said distance (7) shortens in the direction from the borehole (2) orifice to said borehole (2) bottom. The distance (7) shortens according to a constant coefficient that is less than 1 and the attachment means (5) radially project the connection anchor (1) jacket surface on the gutter collar periphery.
Patent CZ-286359-B6 (CZ)
Title: Disposable absorption article
Inventor: SPIELMANN HARTMUT MARTIN
IPC: A61F13/15
Filed: 1996-12-12
Abstract: In the present invention there is disclosed a disposable absorption article, particularly sanitary towel or a panties cover, containing an upper layer (1) that is permeable to liquids, a bottom layer (2) and an absorption core (3) being placed between the upper layer (1) and the bottom layer (2). The upper layer (1), the bottom layer (2) and the absorption core (3) has a surface turned toward the bearer and a surface turned toward the underwear, whereby the upper layer (1) and the bottom layer (2) are attached to each other along the absorption article circumference. The absorption core (3) has at least two compressed surfaces forming passages (5), whereby each passage (5) depth is at least 25 percent of the absorption core (3) thickness and each of the compressed surfaces forms a deformation region (6) that extends past the compressed surface without contact with the absorption core (3) circumference or with the second deformation region (6). The upper layer (1) surface that is turned toward the bearer underwear is permanently attached to the absorption core (3) surface turned toward the bearer within the deformation region (6) and in the circumference of both the upper layer (1) and the absorption core (3).
Patent CZ-281514-B6 (CZ)
Title: Pharmaceutical preparation
Inventor: DOUGLAS STEPHEN JOHN
IPC: A61K33/245
Filed: 1992-03-05
Abstract: Pharmaceutical prepn. comprises: (a) a salt of ranitidine (I) with a bismuth complex of tartaric or citric acid; and (b) an alkali salt. Pref., the salt is e.g. -N-(Q)-N'-methyl-2-nitro -1,1-ethenediamine-2-hydroxy -1,2,3-propanetricarboxylate -bismuth (3+).
Patent CZ-291072-B6 (CZ)
Title: Method of forming a polyfluorocarbon polymer coating on a razor blade cutting edge
Inventor: TRANKIEM HOANG MAIS
IPC: B05D/
Filed: 1993-04-13
Abstract: The present invention relates to an improved method of forming a polyfluorocarbon coating on a razor blade cutting edge comprising the steps of: (a) subjecting a tetrafluoroethylene polymer powder having an average molecular weight of at least about 1,000,000 g/mol to a dose of ionizing radiation to reduce the average molecular weight from about 700 to about 700,000 (b) dispersing the irradiated fluorocarbon polymer in an aqueous solution which is free of chlorofluorocarbon solvents; (c) coating said razor blade cutting edge with the dispersion; and (d) heating the coating sufficiently to adhere the fluorocarbon polymer to the blade edge.
Patent CZ-288546-B6 (CZ)
Title: Medicament for treating cardiac, cerebral vascular, renal and gastrointestinal disorders
Inventor: COHEN MARLENE LOIS
IPC: A61P15/00
Filed: 1996-06-04
Abstract: In the present invention there is described the use of a benzothiophene derivative of the general formula I, in which Re1 and Re2 represent independently on each other a hydrogen atom, an alkyl group containing 1 to 4 carbon atoms, the group -CO-(Ci(1-6)alkyl), -CHi2-Ar or -CO-Ar, wherein Ar represents an optionally substituted phenyl, Re2 is selected from a group comprising a pyrrolidine radical, a hexamethyleneimino group and piperidino group, or pharmaceutically acceptable salt or solvate thereof for preparing a pharmaceutical preparation intended for treating heart disorders, further for treating cerebral vascular disorders, for treating renal disorders and for treating gastrointestinal disorders by antagonizing or blocking calcium channels in vascular tissues.
Patent CZ-298594-B6 (CZ)
Title: Mobile push-rod key, safety lock barrel for such a key and lock equipped witch such a barrel
Inventor: DARMANIN CHRISTIAN
IPC: E05B35/00
Filed: 1999-03-18
Abstract: In the present invention, there is disclosed a key for a safety lock barrel comprising a blade of elongate flat shaped profile intended for inserting into a keyhole (8) of the cylinder lock rotor (4). This blade has at least one transversely arranged seat that is parallel with central plane of the key blade and that is adapted to receive at least one adjustable driver (32). Said adjustable driver (32) moves transversely relative of the key blade longitudinal axis ensuring so displacement of an adjustable pin-type adjuster (218) to a position enabling angular displacement of the rotor (4) relative to a stator (7). Said adjustable driver (32) comprises at least one shaped lateral surface (40, 41) that is intended for interaction through a hole with an adjustable pin-type adjuster (119) of the rotor (4). Mutual position of the adjustable driver (32) shaped lateral surface (40, 41) and the adjustable pin-type adjuster assigned thereto is defined by a positioning element.
Patent SK-277782-B6 (SK)
Title: Method of decalcification of pelt
Inventor: KOLOMAZNIK KAREL
IPC: C14C1/08
Filed: 1992-07-10
Abstract: Invention deals with method of decalcification of pelt after calcium sulphide limening, which minimizes the contamination of waste waters by ammonium ions. As decalcification agent is used lactate magnesium, which is doses in quantity 0,5 to 3,5 per cent relating to weight of pelt.
Patent SK-278219-B6 (SK)
Title: Maintenance method of drainage or other closeable space
Inventor: RACEK MARIAN
IPC: F16L55/16
Filed: 1990-11-21
Abstract: Non-excavation maintenance is provided as follows: Infiltrated water is forced out by compressed air and a space is filled with a water glass. In the next phase the water glass solution is interchanged with a bentonite suspension in a citric acid aqueous solution under constant overpressure of the air. After saturation of the environment, the suspension is pumped off and the constant air overpressure is holding up in the maintained space until the watertight gel is originated.
Patent SK-288316-B6 (SK)
Title: Process for preparation of aqueous suspension comprising beclometasone diproprionate as active ingredient in form of particles of size suitable for pulmonary or nasal inhalation
Inventor: BERNINI EVA
IPC: A61P37/00
Filed: 1999-10-28
Abstract: A process for the preparation of an aqueous suspension for the treatment of respiratory diseases by pulmonary or nasal inhalation comprising beclometasone diproprionate as active ingredient in the form of particles of a size suitable for inhalation, whereby said process comprising dispersing an aqueous solution in a turboemulsifier apparatus; adding the micronized active ingredient to the aqueous phase; dispersing the micronized particles of the active ingredient in said aqueous phase by applying aspeed comprised between 2000 and 3000 rpm for a time of 15 to 20 minutes; and further subjecting the obtained aqueous suspension to an homogenisation treatment under high-pressure with an homogenizer apparatus including a high pressure pump supplying a pressure up to 150 MPa (1500 bar).
Patent CZ-305728-B6 (CZ)
Title: Process for preparing fluorene derivative
Inventor: MURASE HIROAKI
IPC: C07C43/23
Filed: 2002-01-29
Abstract: In the present invention, there is disclosed a method of producing a fluorene derivative, which comprises subjecting fluorenone and a phenolic compound (such as 2-alkylphenol containing 1 to 4 carbon atoms in the alkyl moiety) to a condensation reaction in the presence of mercaptocarboxylic acid and a hydrochloric acid aqueous solution to obtain a fluorene derivative ( such as 9,9-bis(alkylhydroxyphenyl)fluorene containing 1 to 4 carbon atoms in the alkyl moiety), wherein the fluorenone/mercaptocarboxylic acid weight ratio is approximately 1/0.05 to 1/0.3 wherein the ratio of said mercaptocarboxylic acid to hydrogen chloride comprised in said aqueous solution of hydrochloric acid is approximately 1/0.3 to 1/2. Using the preparation method according to the present invention it is possible to obtain an extremely pure fluorine derivative exhibiting excellent transparency without need of use gaseous hydrogen chloride, which is difficult to handle.