baber/WOPTO huggingface dataset:
Patent SG-10201809832Y-A (SG)
Title: Otoscope and otoscopic method based on spectral analysis
Inventor: LEPPLE-WIENHUES ALBRECHT
Filed: 2015-05-05
Abstract: Otoscope and otoscopic method based on spectral analysis The invention relates to an otoscope device, especially configured to be manipulated by a 5 user during its application, comprising: a portion configured to be introduced in an ear canal of a patient’s outer ear; and an electronic imaging unit (40) configured for capturing at least one image of the patient’s outer ear, especially of the eardrum; wherein the otoscope device further comprises electronic and/or optic means configured for determining spectral information, especially with respect to wavelengths shorter than 10 550nm, and configured for identifying and/or locating objects shown in the at least one image, especially the eardrum, in dependence on a specific amount of blue components and/or UV components of the image or of radiation reflected from the object. Further, the invention relates to a method of identifying and/or locating objects in a subject’s ear or to a method of identifying an eardrum. 15 (Fig. 1)
Patent SG-10201902585Q-A (SG)
Title: Electrolyte for rechargeable electrochemical cell
Inventor: ADAMSON GEORGE
IPC: H01M50/562
Filed: 2015-10-06
Abstract: ELECTROLYTE FOR RECHARGEABLE ELECTROCHEMICAL CELL The present invention provides an aqueous electrolyte for use in rechargeable zinc-halide storage batteries that possesses improved stability and durability and improves zinc-halide battery performance. One aspect of the present invention provides an electrolyte for use in a secondary zinc bromine electrochemical cell comprising from about 30 wt% to about 40 wt% of ZnBr 2 by weight of the electrolyte; from about 5 wt% to about 15 wt% of KBr; from about 5 wt% to about 15 wt% of KC1; and one or more quaternary ammonium agents, wherein the electrolyte comprises from about 0.5 wt% to about 10 wt% of the one or more quaternary ammonium agents. No suitable Figure
Patent SG-11201804287S-A (SG)
Title: Band-shaped occlusion means
Inventor: MONSTADT HERMANN
IPC: A61B17/12
Filed: 2016-11-24
Abstract: Band-shaped Occlusion Means The invention relates to an implant for vascular applications that can be trans- 5 ported by means of a catheter and is intended in particular to influence the blood flow in the area of arteriovenous malformations, such as fistulas and aneurysms, to fill the saclike dilation of the malformation, promote thrombus formation and cover the neck of the malformation. The implant according to the invention is pro- vided with an occlusion unit (1, 13) having a three-dimensional shape constructed 10 from several subunits (5a, 14) from a framework of struts (5, 16, 17), with a cov- ering, preferably a membrane (6), being located between struts (5, 16, 17). - Figure 4 - 15
Patent SG-11201810105Q-A (SG)
Title: Ticketing management system and program
Inventor: SHIMIZU TOMOYUKI
IPC: G06F21/32
Filed: 2018-05-11
Abstract: 16427/3 TICKETING MANAGEMENT SYSTEM AND PROGRAM PROBLEMS TO BE SOLVED In a prior art system, it was not possible to prevent wrongful re-sale or transfer to third parties via a terminal, and effort and time are required for authentication by face recognition, as is the case with paper tickets. MEANS FOR SOLVING THESE PROBLEMS A ticketing management system 1 having a server 2, a user terminal 3, and a code reader 4. The server 2 has a code issuer configured to issue a unique code 5 when there is a match between biodata that the user has previously registered and biodata that the user registers at an event venue. Additionally, the server 2 has a user authenticator that employs the code reader 4 to authenticate the user as the authentic ticket purchaser by reading the unique code displayed on the user terminal 3. ADVANTAGEOUS EFFECTS To make it possible to reliably prevent wrongful activity such as a wrongful re-sale of a terminal or ticket counterfeiting and re-sale, and to enable a speedy admission process, while using highly accurate biometrics. SELECTED DRAWING FIG. 1
Patent SG-11201811180P-A (SG)
Title: Communication methods, computer-readable media, communication devices, and servers
Inventor: SULAKHE NIKHIL ATUL
IPC: A63F13/55
Filed: 2016-06-29
Abstract: Generatea hint on solving a situation in an electronic game Transmit the hint to a server configured to provide the hint to garners playing the electronic game FIG A (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 04 January 2018 (04.01.2018) WIP0 I PCT Iiiimmomitia °nolo olonmommolionom (10) International Publication Number WO 2018/004453 Al (51) International Patent Classification: A63F 13/30 (2014.01) A63F 13/55 (2014.01) A63F 13/20 (2014.01) A63F 13/69 (2014.01) (21) International Application Number: PCT/SG2016/050302 (22) International Filing Date: 29 June 2016 (29.06.2016) Filing Language: English Publication Language: English Applicant: RAZER (ASIA-PACIFIC) PTE. LTD. [SG/SG]; 514 Chai Chee Lane, #07-05, Singapore 469029 (SG). (72) Inventor: SULAKHE, Nikhil Atul; c/o Razer Inc., 201 3rd Street, Suite 900, San Francisco, California 94103 (US). (74) Agent: VIERING, JENTSCHURA & PARTNER LLP; P.O. Box 1088, Rochor Post Office, Rochor Road, Singa- pore 911833 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) (25) (26) (71) (54) Title: COMMUNICATION METHODS, COMPUTER-READABLE MEDIA, COMMUNICATION DEVICES, AND SERVERS 100 102 104 (57) : According to various embodiments, a communication method may be provided. The communication method may in- clude: generating a hint on solving a situation in an electronic game; and transmitting the hint to a server configured to provide the hint to gamers playing the electronic game.
Patent SG-11201901330X-A (SG)
Title: Modified conjugated diene-based polymer, production method thereof, rubber composition and tire
Inventor: KYO MIKI
IPC: C08L15/00
Filed: 2017-08-09
Abstract: MODIFIED CONJUGATED DIENE-BASED POLYMER, PRODUCTION METHOD THEREOF, RUBBER COMPOSITION AND TIRE A modified conjugated diene-based polymer having a nitrogen atom, wherein a content of the nitrogen atom is 25 mass ppm or more based on a total amount of the modified conjugated diene-based polymer, a shrinking factor (g') is 0.59 or less in a GPC- light scattering measurement method with a viscosity detector, and a weight average molecular weight is 200,000 or more and 3,000,000 or less.
Patent SG-11201907216W-A (SG)
Title: Adjustable flow nozzle system
Inventor: FORGEY CHRISTIAN K
IPC: B05B15/68
Filed: 2018-02-08
Abstract: 104 120 108 104 130 124 108 104 104 104 104 104 110 118 102 132 1-1 112 GC GC 1-1 00 114 116 121 1 -1 (57) : Various embodiments for an adjustable flow nozzle system having a manifold with a plurality of adjustable flow nozzles 0 in which the flow rate of each adjustable flow nozzle may be individually adjusted are described herein. 106 122 128 104 FIG. 2 PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) olimion °noI0 DIDIIHmoMoIIHE111110 DIIIIII DID (10) International Publication Number WO 2018/148448 Al WIPO I PCT (12) INTERNATIONAL APPLICATION (19) World Intellectual Property Organization International Bureau (43) International Publication Date 16 August 2018 (16.08.2018) (51) International Patent Classification: B05B 1/02 (2006.01) B05B 1/30 (2006.01) B05B 1/04 (2006.01) B05B 9/00 (2006.01) B05B 1/12 (2006.01) BO5B 15/00 (2018.01) B05B 1/14 (2006.01) BO5B 15/65 (2018.01) B05B 1/16 (2006.01) BO5B 15/658 (2018.01) B05B 1/20 (2006.01) BO5B 15/68 (2018.01) (21) International Application Number: PCT/US2018/017475 (22) International Filing Date: 08 February 2018 (08.02.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/456,549 08 February 2017 (08.02.2017) US (71) Applicant: OEM GROUP, LLC [US/US]; 2120 W. Guadalupe Road, Gilbert, Arizona 85233 (US). (72) Inventors: FORGEY, Christian K.; 1232 Pine Forest Cir- cle, Round Rock, Texas 78665 (US). NELSON, Mark; 1062 Boeshore Circle, Reading, Pennsylvania 19605 (US). TRUFANOV, Alexander; 572 Creekside Drive, Souder- ton, Pennsylvania 18964 (US). (74) Agent: BAI, Ari M. et al.; Suite 1200, One East Washing- ton, Phoenix, Arizona 85004 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (54) Title: ADJUSTABLE FLOW NOZZLE SYSTEM o [Continued on next page] WO 2018/148448 Al MIDEDIMOMMIDIREEMOMMEIROMOIEHMEMOIMIE TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3))
Patent AT-407495-B (AT)
Title: Device for treating a liquid
IPC: B01F5/06
Filed: 1999-04-23
Granted: 2001-03-26
Abstract: The invention describes a device for treating a liquid, having a closed vessel 1, which is rotationally symmetrical with respect to a vertical axis and the interior of which is divided by a coaxial container insert 6 into a central flow passage 10 and an annular passage 11 which surrounds this flow passage 10, the central flow passage 10 and the annular passage 11 being connected at one end via a coaxial circulation pump 12 with a rotor 13 which adjoins the central flow passage 10 on the suction side and at the opposite end via a guide device 7 which runs in the opposite direction to the direction of rotation of the rotor 13. To create advantageous structural conditions, it is proposed for the rotor 13 of the circulation pump 12, which is designed as a radial pump, to be mounted in the cover 4 of the vessel 1, for the vessel insert 6 to be supported via the guide device 7 on the base 3 of the vessel 1, and for the cross sections of flow of the central flow passage 10 and of the annular passage 11 to be at least substantially equal. <IMAGE>
Patent HU-199177-B (HU)
Inventor: SZEP ISTVAN
IPC: E01C7/18
Filed: 1986-01-16
Abstract: A találmány szerinti eljárás lényege, hogy a károsodott, deformálódott aszfaltburkolatok (1) felújítását az aszfaltbedolgozó gépegységhez (5) kapcsolódó, ahhoz igazodó hevítőberendezés (4) segítségével — infrasugárzó melegítéssel végezzük el, oly módon, hogy a károsodott aszfaltburkolat (1) fölső rétegét a meghibásodástól függően 1—3 cm vastagságban, roncsolásmentesen, infrasugárzó hevítő- berendezéssel (4) 70—120°C közötti értékre melegítjük fel, a melegítéssel egyidőben a fölmelegített képlékennyé vált aszfaltburkolatra (1) szükség szerint 1—3 cm vastagságban egyrétegű, új aszfaltot (2) terítünk, majd a régi és az új felhordott aszfaltrétegeket (1, 2) hengerléssel homogén egységgé dolgozzuk össze. Γ7  a  ΒΓ -1-
Patent HU-208272-B (HU)
Title: Table-frame for production equipments of modular structure
Inventor: STICHT WALTER
IPC: B23Q1/00
Filed: 1985-02-05
Abstract: A modular machine table comprises a pair of vertical plate-like support components interconnected via horizontal transverse struts by releasable coupling devices and supporting a table plate secured by releasable coupling devices. The plate-like components are suitably of channel form and are provided with adjustable lower supports and with bores in the web for receipt of coupling means for joining adjacent tables and in the flange for mounting of a safety module or the like. The table plate is formed with bores and recesses for mounting guiding drive, coding and positioning modules and with a pattern of bores and/or slots for locating and mounting working devices. In one embodiment a table plate is provided with a turntable and two sets of guide modules intersecting at the turntable whereby a workpiece carrier may be displaced from one to another guide path. The plate-like components are arranged flush with edges of the table plates so that the plate-like components of adjacent tables may be abutted. Common parts are used for the construction of different tables in readily dissemblable manner, which are of high rigidity and which by virtue of their modular nature allow flexible arrangement of a production line.
Patent HU-215855-B (HU)
Title: Process for producing lh-rh analogues and pharmaceutical compositions containing them
Inventor: NESTOR JOHN J
IPC: C07K7/23
Filed: 1988-02-04
Abstract: Peptides of formula (I) and pharmaceutically acceptable salts are new: A-B-C-Ser-D-E-F-G-Pro-J (I) where A= aminoacyl from D- or L- isomers of: N-Ac-D,L- delta (3,4)-Pro, N-Ac-D,L-Pro, N-Ac-D,L-Phe, N-Ac-D,L- Pcl-Phe, N-Ac-D,L-PF-Phe, N-Ac-3-(1-naphthyl)-D,L-Ala, N-Ac-3-(2-naphthyl)-D,L-Ala and N-Ac-3-(2,4,6-trimethylphenyl)-D,L-Ala; B = D-Phe, D-Pcl-Phe, D-PF-Phe, D-PNO2-Phe, 2,2-diphenylglycyl, D-alpha-methyl-P-cl-Phe or 3-(2-naphthyl)-D-Ala; C= D-Trp, D-Phe, 3-(3-pyridyl)-D-Ala or 3-(2-naphthyl)-D-Ala; D= L-Phe, L-Tyr, 3-(3-pyridyl)-Ala, Arg or G; E= 3-(2-naphthyl)-D-Ala, 3-(3-pyridyl)-D-Ala, D-Tyr, D-Trp, D-nicotinyl-Lys, pyridylacetyl-Lys, D-Glu(AA) or G; F= L-Leu, L-Nle, L-Phe, L-Trp or 3-(2-naphthyl)-L-Ala; G = gp. of formula (IIa), (IIb) or (IIc); n = 1-5; R1 = 1-6C alkyl or fluoroalkyl; R2 = H or R1; or R1-NH-C=NR2 = ring of formula (IIIa), (IIIb) or (IIIc): m = 1-4; A = H or 1-6C alkyl; X = A or halogen; R3 = H, 1-6C alkyl, phenyl or phenyl-lower alkyl; J = D-Ala-NH2, D-Leu-NH2, Gly-NH2 or -NHR4; R4 = lower alkyl or -NHCONH2; D-On(AA) = anisole adduct to D-Glu to form a P-methoxy-phenylketone (at the carboxyl termius of the glutamic acid side chain), i.e. Glu (pMeO-Ph).
Patent HU-198094-B (HU)
Title: Starch containing ydrophil polymer composition for injection oulding and process for producing shaped product from the composition by injection moulding
Inventor: WITTWER FRITZ
IPC: C08L7/00
Filed: 1984-02-17
Abstract: Capsules and other shaped products formed from a moldable starch composition in an injection molding device is disclosed in the present invention. The composition comprising starch having a molecular mass range of 10,000 to 20,000,000 Dalton, and a water content range from 5 to 30% by weight. The starch contains about 0 to 100% of amylose, and about 100 to 0% of amylo-pectin.
Patent HU-198499-B (HU)
Title: Process for producing cefemcarboxylic acid derivatives
Inventor: NAITO KENZO
IPC: C07D501/18
Filed: 1987-02-27
Abstract: A method for producing a compound of the formula;
     wherein R stands for a hydrogen atom, an acyl group or a protective group other than acyl groups, Q stands for a hydrogen atom or an ester residue, Y stands for the residue of a nucleophilic compound and the dotted line shows the double bond at 2- or 3- position of the cephem ring or a salt thereof, characterized by allowing a compound of the formula;
     [R, Q and the dotted line are of the same meaning as abovelor a salt thereof to react with a nucleophilic compound or a salt thereof and a compound of the formula;
     wherein R 1 , R 2  and R 3  independently stand for a hydrocarbon group having not more than 8 carbon atoms, or R' and R 2 , R 1  and R 3  or R 2  and R 3  may be combined to form polymethylene group, according to which the end product [I] of high quality can be provided in a high yield by one reaction step by using the compound [III] of relatively low cost, thus the method of this invention is advantageous for mass-producing the compound [I] on an industrial scale from the compound [II] and a nucleophilic compound.
Patent HU-191252-B (HU)
Title: Process for producing 4-amino-6,7-dimetoxy-2-/4-/furo-2-y1/-piperazin-1-y1/-quinazoline and pharmaceutically acceptable salts thereof
Inventor: SCHICKANEDER HELMUT
IPC: C07C239/00
Filed: 1984-02-29
Abstract: The invention relates to a new multistage process for the production of 4-amino-6,7-dimethoxy-2-[4-(furo-2-yl)-piperazin-1-yl]-quinazoline corresponding to the following formula   <IMAGE>   and physiologically compatible salts thereof, which gives better yields and uses less expensive and more reactive materials than known processes. The intermediate product formed in this process, N''-cyano-N'-(3,4-dimethoxyphenyl)-O-phenylisourea, shows antihypertensive activity on its own.
Patent LT-3938-B (LT)
Title: Boiler for central heating
Inventor: RINKEVICIUS EDUARDAS
IPC: F24H1/00
Filed: 1995-06-19
Abstract: The invention is used the in branch of thermal energetics, namely for the production of water heating boilers using solid fuel. In order to increase the stability of the burning process, reduce the input of fuel and the quantity of hazardous materials, exhausted to the air, a new part is introduced to the standard boiler using the furnace (1) of the hardened construction, chimney (6), upper (loading) (7) and bottom (cleaning) (8) doors, fire grate (20), an ash collecting bin (11), air in-suck vent (9), which is connected to a draught regulator (10) by a chain, nipples (18) for connecting the heating system and the burning products exhaustion nipple (13) is the installed with an opening at the bottom, which divides (2) the furnace (1) into the chambers of the primary (3) and secondary (4) burnings, the planes of the secondary chamber are covered by fictile catalysers (5), at the bottom of these catalysers, the secondary channels (21) of the air supply are formed, the chimney (6) must be formed in the shape of the letter "U".
Patent LT-3322-B (LT)
Title: The pump
Inventor: KUPRENAS JONAS
IPC: F04C23/02
Filed: 1993-05-04
Abstract: This invention is for the mechanical engineering industry. The purpose of this invention is to simplify construction and increase reliability. The compressor pump consists of a body, which has a spherical surface (1), spherical rotor (2), put on the roll (3), and a spherical rotor cover (4). The axles of the rotor (2) and the rotor cover (4), crossing the middle and the centre of the body, form an angle a = 25-35 degrees. The rotor (2) has radial pistons (5), sealed with gaskets (6). The pistons (5) are connected to the rotor (2) with pins (7), which have looseness in the gaps of rotor cover (4). In the compressor pump body there are two pairs of inlets (8)-outlets (9), located at different levels (upper and lower). The work chambers (10, 11) are formed between the rotor cover (4) and the pistons (5).
Patent ZA-82393-B (ZA)
Title: Base-substituted anthranilic acids,a process for their preparation and their use
Inventor: STURM KARL
IPC: C07D333/20
Filed: 1982-01-21
Abstract: The invention relates to base-substituted anthranilic acids of the formula I   <IMAGE>   in which R denotes furyl, thienyl or phenyl, and to physiologically acceptable salts thereof, and also to a process for their preparation, to an agent containing these and to their use as medicaments.
Patent AT-394241-B (AT)
Title: Lock
IPC: E05B63/16
Filed: 1990-10-08
Granted: 1992-02-25
Abstract: A lock with a latch 2 and a bolt 4 which can be jointly actuated by means of a rotatable follower 3, on which an outer and an inner door handle engage. The follower 3 is connected to the bolt 4 via a linkage 11, 12, 13. A blocking device actuable by a key or the like is provided. The follower 3 is divided into two follower discs 7, 8 in a plane lying perpendicularly to the axis of rotation of the follower. Each follower disc 7, 8 is assigned to a door handle, and a latch 2 and bolt 4 are actuated by only one of the follower discs 8. <IMAGE>
Patent FI-68896-B (FI)
Inventor: WIKLUND KARL THORE EDWARD
IPC: F17D5/04
Filed: 1979-12-27
Granted: 1985-07-31
Abstract: A hose-break valve comprises a valve housing (2) and a sliding gate (1) movable therealong and is connected with a pressure hose (5) which is surrounded by a protective sleeve (14), while defining a space (13) filled with a pressure medium. The sliding gate (1) is under the action of, on the one hand, the pressure medium in said space (13) and, on the other hand, a loading device (17) acting opposite the pressure medium. First and second pressure relieving devices (19 and 80-82, respectively) are provided for closing the valve by means of the loading device (17) when the pressure of the pressure medium in said space (13) respectively exceeds an upper limit value and falls short of a lower limit value.
Patent FI-73675-B (FI)
Inventor: EVANS JOHN MORRIS
IPC: C07D311/70
Filed: 1982-09-23
Granted: 1987-07-31
Abstract: Compounds of formula (I):   <IMAGE> (I)  wherein: one of R1 and R2 is hydrogen and the other is selected from the class of alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy, alkylhydroxymethyl, nitro, cyano, chloro, trifluoromethyl, alkylsulphinyl, alkylsulphonyl, alkoxysulphinyl, alkoxysulphonyl, alkylcarbonylamino, alkoxycarbonylamino, or aminosulphinyl, aminosulphonyl or aminocarbonyl, the amino moiety being optionally substituted by one or two alkyl groups, or alkylsulphinylamino, alkylsulphonylamino, alkoxysulphinylamino or alkoxysulphonylamino, or ethylenyl terminally substituted by alkylcarbonyl, nitro or cyano or -C(alkyl)NOH or -C(alkyl)NNH2, the alkyl groups or alkyl moieties of alkyl-containing groups having from 1 to 6 carbon atoms; one of R3 and R4 is hydrogen or alkyl having from 1 to 4 carbon atoms and the other is alkyl having from 1 to 4 carbon atoms, or R3 and R4 together with the carbon atom to which they are attached are spiroalkyl having from 3 to 6 carbon atoms; R5 is hydrogen, alkyl having from 1 to 3 carbon atoms or acyl having from 1 to 8 carbon atoms; and n is 1 or 2; the lactam group being trans to the OR5 group; have anti-hypertensive activity and are of use in the treatment of high blood pressure.