baber/WOPTO huggingface dataset:
Patent EP-1026101-B1 (EP)
Inventor: VAN RUTTEN THEORDORUS WILHELMU
IPC: B65D85/52
Filed: 1999-12-31
Granted: 2003-07-23
Abstract: The invention relates to method for providing an envelope (5) round a device comprising one or more platforms (3) positioned one above another, wherein a few upwardly extending, spaced-apart uprights (4) are provided near the circumference of said platform(s), along which the envelope is guided. A cloth formed in one piece is provided round the uprights, the length of which cloth corresponds approximately to the circumference of a platform, and the adjoining, upwardly extending edges of the cloth are joined together by means of a zipper (8) after provision of the cloth. <IMAGE>
Patent EP-0928807-B1 (EP)
Inventor: NOSU TSUTOMU
IPC: C08K3/26
Filed: 1999-01-06
Granted: 2003-06-25
Abstract: Zinc-containing hydrotalcite particles which satisfy the following requirements (1) to (4):   (1) the chemical composition should be represented by the following formula (A): ZnxAl2(OH)4+2xCO3.mH2O wherein x and m satisfy 3.5 </= x </= 4.5 and 0 </= m </= 4, respectively, (2) the average secondary particle size should be 2  mu m or less, preferably 0.3 to 1.5  mu m, (3) the amount of particles having a particle size of 10  mu m or more out of all the particles should be 1 wt% or less, preferably 0.5 wt% or less, and (4) the specific surface area measured by a BET method should be 20 m<2>/g or less, preferably 4 to 15 m<2>/g; and a resin composition comprising 0.001 to 5 parts by weight of the zinc-containing hydrotalcite particles based on 100 parts by weight of the polyolefin resin. This resin composition has excellent heat deterioration resistance, rust formation preventing properties, coloration preventing properties, dispersibility and filter permeability.
Patent EP-0991157-B1 (EP)
Inventor: THOMPSON MALCOLM
IPC: H02G3/04
Filed: 1999-09-14
Granted: 2010-01-06
Abstract: A lid retainer 30 to enable securing of a lid to an elongate cable tray is disclosed. The retainer 30 comprises a flat base section 31 and a side section 32 extending upwardly from an edge of the base section. A lip 33 extends from an upper edge of the side section 32 on the same side as, and generally parallel to, the base section 31. Retaining flanges 34 extend into the angle between the lip 33 and the side section 32 from positions adjacent the upper edge of the side section 32. <IMAGE>
Patent EP-0977513-B1 (EP)
Inventor: STIHL EWALD
IPC: A61B90/00
Filed: 1999-01-22
Granted: 2000-11-29
Abstract: L'invention concerne un instrument médical à tige coulissante présentant une tige coulissante (2) qui comporte deux éléments coulissants (22, 24) placés côte à côte et pouvant coulisser axialement l'un par rapport à l'autre. Cet instrument présente également au moins une partie mâchoire (82, 86) à son extrémité distale, qui peut être actionnée au moyen d'un élément de manipulation (16) à son extrémité proximale, par un mouvement relatif des deux éléments coulissants (22, 24). L'élément de manipulation (16) comprend deux branches (34, 36) mobiles l'une par rapport à l'autre. Le premier élément coulissant (22) est placé de façon à pouvoir pivoter à l'extrémité distale d'une tige tubulaire (12) fixée de façon libérable à l'élément de manipulation (16). La tige tubulaire (12) peut coulisser par rapport au deuxième élément coulissant (24) pour actionner la ou les parties mâchoires. Le premier élément coulissant (22) peut pivoter lorsque la tige tubulaire (12) est libérée par l'élément de manipulation (16) et est légèrement déplacée.
Patent EP-1055253-B1 (EP)
Inventor: SCHMUTZ WOLFGANG
IPC: H01L21/00
Filed: 1999-02-11
Granted: 2002-11-13
Abstract: The invention relates to a device for loading substrates into and unloading them from a clean room, comprising a lock device onto which a transport box for receiving the substrates can be placed and which is fitted with a hermetically sealing lock opening, and a process unit adjacent to the lock opening. To allow for a valid adjustment of the lock device in relation to the process unit even when the lock device is exchanged, the invention provides for an adapter device to be positioned between the process unit and the lock device to which the lock device can be removably fixed and which is maintained at the level of the process unit and can be adjustably aligned in relation to same.
Patent EP-1069152-B1 (EP)
Inventor: ONO MITSUFUMI
IPC: C08F210/02
Filed: 1999-03-17
Granted: 2006-01-18
Abstract: A method which comprises adhering to a substrate surface an ETFE powder having a viscosity γ of 1X104 Pa.sec or lower, a retarded elasticity ε of 5X10-4 Pa-1 or lower, an average particle diameter of 5 to 1,000 ν, and an apparent specific gravity of 0.5 g/cc or higher, heating the adherent powder to melt it, and cooling the melt to solidify it to thereby form a coating film.
Patent EP-1097410-B1 (EP)
Inventor: MORFINO GIUSEPPE
IPC: G05B19/404
Filed: 1999-07-05
Granted: 2002-04-03
Abstract: A system and a process are described for performing the Static Error Compensation on numerically controlled machine tools. The process comprises the steps of: connecting a measuring laser device (5) to a numerically controlled machine tool (1); automatically sending a point 0 of the machine (1) to the laser device (5); sending commands for taking m measure points of the machine (1) from the control (3) to the laser device (5); automatically detecting the measure points and sending consolidated data from the laser device (5) to the control (3); producing a model of static errors of the machine (1); executing the Static Error Compensation depending on said produced model.
Patent EP-1049963-B1 (EP)
Inventor: PISCHEL JOCHEN
IPC: G05B19/418
Filed: 1999-01-13
Granted: 2003-05-02
Abstract: A method for allocating industrial or technical resources within technical systems, in particular to avert malfunctions, the system's operational state being represented by at least two parameter values, in such manner that as regards at least three different system operational states (Examples) at each of which at least one predetermined system function has been attained, the parameter value associated with the particular operational state is detected by detectors and is stored in a memory and in that, by means of pairwise comparison each time of two operational states and represented by the associated parameter values, a gauge is ascertained for the effect of the individual parameters on system function. The method of the invention allows quick and efficient resource allocation within technical systems, malfunctioning of such systems being reliably avoidable. Equipment of the invention operates on the principle of the method of the invention.
Patent EP-1113737-B1 (EP)
Inventor: DRIESEN GEORGES
IPC: A46D1/00
Filed: 1999-07-02
Granted: 2003-09-17
Abstract: The invention is directed to a bristle for a toothbrush, particularly for an electric toothbrush, and to a method for its manufacture. The bristle is manufactured from a monofilament (5) made of plastic. The bristle has in its cross section at least two zones (6, 7) and at least one point of preferred breaking.
Patent EP-1118200-B1 (EP)
Inventor: BANATRE MICHEL
IPC: H04W8/14
Filed: 1999-09-29
Granted: 2008-02-27
Abstract: The invention concerns a portable station for processing data comprising data processing means (10, 11, 12) and communication means (20, 30) capable of exchanging data with another station equipped with compatible communication means. The communication means (20, 30) include a transmission/reception module by direct mode channel (20) operating according to at least a specific data transmission/reception protocol and a module monitoring the zone (40, 50) to detect therein the presence of compatible stations, as well as a local communication module (30) co-operating with the various modules (40, 50, 20, 10, 11, 12) to operate the transmission/reception module according to the specific protocol, when the monitoring module detects a station, then to initialise a dynamic connection with said station, to exchange data according to the specific protocol format, and maintain said connection as long as the station remains detected.
Patent EP-1129190-B1 (EP)
Inventor: SIMS JOHN E
IPC: C12P21/02
Filed: 1999-11-12
Granted: 2007-05-16
Abstract: The invention is directed to purified and isolated novel TSLP polypeptides, the nucleic acids encoding such polypeptides, processes for production of recombinant forms of such polypeptides, antibodies generated against these polypeptides, fragmented peptides derived from these polypeptides, and the uses of the above.
Patent EP-1066689-B1 (EP)
Inventor: HEINILAE MARKO
IPC: H04B1/707
Filed: 1999-12-28
Granted: 2008-12-10
Abstract: The invention relates to a reception method and a receiver to receive signals supplied from a radio path, and the signals include information and each signal which arrives at the receiver is delayed by a unique delay value. The receiver includes a filtering device and a distribution device to determine the strength of a part of a signal delayed by a certain propagation delay by several values of the propagation delay. The distribution device compares the delay differences of the received signals with each other and forms sums of the strengths of the signal parts determined by different values of the propagation delay. The distribution device selects values deviate at least by a predetermined delay difference whose sum of the strengths of the signal parts obtains the highest possible value. The receiver indicates the received information by using the signals selected above.
Patent EP-1140684-B1 (EP)
Inventor: BUMGARNER KIRK P
IPC: B65H75/14
Filed: 1999-12-14
Granted: 2004-10-20
Abstract: An optical fiber shipping spool (22), winding system and method for allowing automated winding of an accessible lead meter portion of optical fiber onto the spool (22). The spool comprises primary and lead meter barrels (24, 28) separated by an outboard flange (26). The outboard flange (26) has a slot (32) extending to its periphery, the slot (32) providing a path for fiber between the lead meter and primary barrels, the slot (32) having an inlet facing the lead meter barrel (28) and an outlet facing the primary barrel (24). The slot (32) is angled such that when fiber being wound onto the lead meter barrel (28) comes into contact with the slot inlet, the fiber is automatically drawn into the slot (32) and then guided by the slot (32) onto the primary barrel (24). According to another aspect, a high-strength rib configuration is disclosed including a plurality of curved, intersecting ribs (90) formed on a flange (26D) of the spool
Patent EP-1115817-B1 (EP)
Inventor: SKOELD ROLF
IPC: C10M173/02
Filed: 1999-09-03
Granted: 2004-12-29
Abstract: The present invention is directed to a method for mechanical working of a metal containing copper, aluminum or an alloy thereof. The method is carried out in the presence of an aqueous cooling lubricant containing an alkanol amine. The lubricant is capable of preventing and reducing the corrosion of both metals and iron.
Patent EP-1121365-B1 (EP)
Inventor: MARCUCCIO SEBASTIAN MARIO
IPC: C07B37/04
Filed: 1999-10-14
Granted: 2005-06-08
Abstract: This invention relates to a process for covalently coupling organic compounds which comprises: reacting an olefinic compound having at least one carbon to carbon double bond or an acetylenic compound having at least one carbon to carbon triple bond with a diboron derivative in the presence of a Group 8-11 metal catalyst to form an organoboron intermediate having an organoboronate residue on at least one carbon atom of the respective double or triple bond; and reacting the organoboron intermediate with an organic compound having a halogen or halogen-like substituent at a coupling position in the presence of a Group 8-11 metal catalyst and a suitable base, whereby the olefinic or acetylenic compound is coupled to the organic compound via a direct bond between the carbon atom having the organoboronate residue and the coupling posiitijno. This invention also relates to a process for preparing an organoboron derivative which comprises reacting an olefinic compound having a leaving group in at the allylic position with a diboron derivative in the presence of a Group 8-11 metal catalyst such that the leaving gruop is replaced with an organoboronate residue. The invention further relates to organoborn intermediates and their preparation.
Patent EP-1124571-B1 (EP)
Inventor: RUDLING MATS
IPC: A61K45/06
Filed: 1999-10-21
Granted: 2005-10-05
Abstract: The invention relates to the use of compounds selected from GH, analogues thereof, and GH-releasing compounds, optionally in combination with lipid-lowering agents or therapy, for the preparation of a drug for treatment of mammals with familial hypercholesterolemia of homozygous form.
Patent IE-86485-B1 (IE)
Title: Epoxy resin adhesive composition and perforated floor panel for clean room comprising the same
Inventor: KIM MYUN SOO
IPC: E04F15/00
Filed: 2012-12-12
Abstract: The present invention provides an epoxy resin adhesive composition and a perforated floor panel for a clean room including the same. The epoxy resin adhesive composition, which is a two-component epoxy resin adhesive composition, includes a main material and a curing agent, wherein the main material includes 18 - 25.7 wt% of a basic epoxy resin, 15 - 22.4 wt% of a modified epoxy resin, 7.3 - 13 wt% of a polyester resin for providing adhesivity, 7 — 19.5 wt% of a methyl ethyl ketone (MEK) solvent for adjusting viscosity, 0.15 — 30.2 wt% of epoxy silane for increasing adhesivity, 6 — 15 wt% of graphite for providing conductivity, 8 - 30 wt% of a first filler for providing viscosity, 5 — 45 wt% of a second filler for providing thixotropy, and 0.01 — 10 wt% of a dispersant for dispersing the first and second fillers, the curing agent includes 14 — 30 wt% of a middle-viscosity amide compound, 10 - 35 wt% of a low-viscosity amide compound, 1.1 — 8.5 wt% of a catalyst for promoting curing, 0.5 - 15 wt% of a methyl ethyl ketone (MEK) solvent for adjusting viscosity, 0.01 - 8 wt% of epoxy silane for increasing adhesivity, 10 - 60 wt% of a first filler for providing viscosity, and 3 — 17 wt% of a second filler for providing thixotropy, and the main material and the curing agent are mixed at a weight ratio of 2:1.
Patent IT-1264665-B1 (IT)
Title: Process for the preparation of polyaspartic acid and its salts
Inventor: CODIGNOLA FRANCO
IPC: C07C/
Filed: 1993-07-05
Granted: 1996-10-04
Abstract: By feeding maleic acid continuously to a reactor held at a temperature of between 150 and 300 degree C and ensuring a residence time of between a few minutes to a few hours, polyaspartic acid of the desired molecular weight and with a small spread of molecular weights is obtained.
Patent IT-1277512-B1 (IT)
Inventor: OLSTAD BJORN
IPC: G01S15/89
Filed: 1995-08-30
Granted: 1997-11-10
Abstract: A method for real-time analysis and measurement of temporal tissue variations and ultrasonic signals which provides quality improvement of tissue images and qualitative and quantitative characterization of the size/shape of the imaged objects is described. A given number of image frames are stored and made available for digital data analysis. For each spatial coordinate, the temporal signal evolution or a derived temporal signal evolution is extracted. These evolutions are analyzed digitally and the resulting image can be displayed on a display unit as an improved 2D tissue image and/or an indicator image for a particular tissue or fluid category in the imaged scene. The resulting image can be further processed with a spatial filter investigating a plurality of neighboring scan lines and a plurality of neighboring ranges at each image coordinate and finally thresholded in order to obtain a binary indicator of the imaged objects that are detected in the combined time and space characterization.
Patent IT-1294733-B1 (IT)
Inventor: BRUNDISINI ANDREA
IPC: A01G25/16
Filed: 1997-09-15
Granted: 1999-04-12
Abstract: Electronic interface associable to an electronic control unit for an automatic watering system for remote controlled management of the system, said electronic control unit having a plurality of output lines (U1 DIVIDED Un, UMV) suitable to control a respective plurality of electro-valves lines (EV1 DIVIDED EVn, MV) of the watering system, the interface comprising a data processing unit (1) connected with first interfacing means (9, 10, 11, 12, 15) of said processing means with at least one communication channel (90, 100, 110, 120, 150) having a remote controlled management apparatus (200, 201, 202 PC), characterised in that it comprises second interfacing means (29) of said processing unit with a first plurality of input lines of the interface that are connectable with output lines of the control unit, and first memory means (7) associated with said processing unit in such a way that said processing unit can detect the changes of state of said output lines of the control unit and memorise such changes of state in said first memory means, and can communicate them to said remote controlled management apparatus, upon request. <IMAGE>
Patent IT-1301841-B1 (IT)
Inventor: ZANONI EDOARDO
IPC: E06B3/30
Filed: 1998-06-30
Granted: 2000-07-07
Abstract: A connecting element (1) for a composite section (100) consisting of a first and a second section (10, 30) comprises two plates (3, 4), one lower (3) and one upper (4), joined by a joining element (5), and a lever (6) integral with the joining element (5); the plates (3, 4) have central axes (103, 104) which are not in the same plane and are inclined at a predetermined angle to each other; the lever (6) is provided with a stop element (7) which engages with a check (18) on the first section (10) to assume a first and a second limit position in which it brings the lower plate (3) into a first and a second inclined position respectively with respect to a first channel (16) of the first section (10), and brings the upper plate (4) into a longitudinal position and into a transverse position respectively with respect to a second channel (31) of the second section (30). <IMAGE>
Patent IT-1311924-B1 (IT)
Inventor: DEL SOLDATO PIERO
IPC: C07C229/64
Filed: 1999-04-13
Granted: 2002-03-20
Abstract: Compounds or their salts having general formula: <?in-line-formulae description="In-line Formulae" end="lead"?>A-B-C-NO<SUB>2</SUB><?in-line-formulae description="In-line Formulae" end="tail"?> wherein: A is a drug radical; B is a linker; and C is a bivalent radical.
Patent IT-1276567-B1 (IT)
Title: Process for the production of ultrafine powders of zirconia stabilised with Y2O3 by low temperature hydrothermal treatment
Inventor: MASCOLO GIUSEPPE
IPC: C01G/
Filed: 1995-05-05
Granted: 1997-11-03
Abstract: Process for the production of ultrafine powders of ZrO2 stabilised with Y2O3 by the low temperature hydrothermal treatment of ternary systems essentially comprising the following stages: a) preparing a suspension containing hydrated ZrO2 gel + Y2O3 + Me2CO3 (where Me = Li, Na, K) + H2O, b) crystallisation treatment, temperature 80-110 degree C, reaction time e.g. 48 hours - 3 days (the reaction time decreases as the crystallisation treatment temperature increases), c) filtration/drying, d) product. The latter may be used as a precursor for the production of solid electrolytes which are mainly used as sensors for gases and in particular oxygen. The invention lies in the scientific field of the production of reactive powders for the advanced ceramics industry. The main problem solved by the invention is the following: the production of reactive ZrO2 powders stabilised with Y2O3 through a single crystallisation treatment performed at a temperature which is so low that it is not found in the literature, all this being performed by means of a very simple process and with the advantage of lesser costs for the ingredients used.
Patent IT-1307121-B1 (IT)
Inventor: DE SIATI LUCA
IPC: F24F13/06
Filed: 1999-01-28
Granted: 2001-10-29
Abstract: According to the invention, a diffuser (10) with an airtight tubular body (11) having a flexible wall is positioned in the upper part of an environment, in which a static layering of warm air tends to occur. The said body (11) has at least one air intake (11.1) through which warm air is conveyed by forced conveying means (13) into the said tubular body (11) and fed in the form of a continuous flow to at least one aperture (nozzle 12) of the body for the outlet of pressurized air, oriented towards the lower layers of air in the environment. A continuous flow of primary air (C) passes through the said at least one aperture (12) into the said lower layers of air in the environment concerned, while it generates an ambient air recirculation field in the vicinity of the aperture (12) by an inductive phenomenon. <IMAGE>
Patent JP-3077697-B1 (JP)
Title: イオン源
IPC: H01J37/08
Filed: 1999-09-09
Granted: 2000-08-14
Abstract: 【要約】
【課題】  真空容器と高電圧が印加される端板との間の 絶縁物へのイオン源物質またはその化合物の付着量を減 少させる。
【解決手段】  このイオン源は、そのイオン源ヘッド８ の一部分を囲む筒状のものであって端板６と同電位の第 １のシールド３０を、端板６から真空容器２内側に向け て延設し、かつイオン源ヘッド８の一部分を囲み、かつ シールド３０と重なり合う部分を有する筒状のものであ って接地電位の第２のシールド３２を、真空容器２から 端板６側に向けて延設している。両シールド３０、３２ 間の重なり合う部分における距離Ｄは、両シールドが置 かれている雰囲気における両シールド間の電位差に対す る放電開始距離をＤ d  、プラズマ生成部１０に導入され るイオン源物質の平均自由行程をλとすると、Ｄ d  ＜Ｄ ＜λを満たすように選ばれている。かつ、両シールド３ ０、３２は、当該イオン源の運転時の両シールド３０、 ３２の表面温度をそれぞれＴ s1 、Ｔ s2 、両シールドが置 かれている雰囲気におけるイオン源物質の再蒸発開始温 度をＴ v  とすると、Ｔ s1 ＜Ｔ v  かつＴ s2 ＜Ｔ v を満たす ように温度制御されている。
Patent JP-3004004-B1 (JP)
Title: 封緘材
IPC: B65D75/64
Filed: 1998-08-26
Granted: 2000-01-31
Abstract: 【要約】
【課題】目的物の開封作業をすばやく正確に行なえるよ うにする。
【解決手段】長手方向に沿ってのみ指先でも引き裂き得 る性質の柔軟な帯状プラスチックフィルム（１１）と、 そのプラスチックフィルム（１１）の表面へ合紙状態に 貼り合わせ一体化された補強用の紙（１２）と、上記プ ラスチックフィルム（１１）の長手中心線上に沿う一定 幅（Ｗ２）の空白部（Ｓ）を残す左右一対の帯状とし て、そのプラスチックフィルム（１１）の裏面にコーテ ィングされた粘着膜（１４ａ）（１４ｂ）と、上記合紙 状態にあるプラスチックフィルム（１１）と紙（１２） との長手方向における一端又は両端の中心部から、広く とも上記空白部（Ｓ）の一定幅（Ｗ２）と同じ一定幅 （Ｗ３）だけ連続的に張り出された一定長さ（Ｌ２）の 引き裂き用摘まみ片（１５）（１５ｆ）（１５ｒ）と、 上記両粘着膜（１４ａ）（１４ｂ）の裏面へ相対的な剥 離自在に貼り合わされたセパレーター（１６）とを備え た封緘材。
Patent JP-2942831-B1 (JP)
Title: 超短光パルス生成器
IPC: G02F1/03
Filed: 1998-09-11
Granted: 1999-08-30
Abstract: 【要約】
【課題】  ファブリ・ペロー光共振器内に、共振器内の 光走行周期に同期して駆動される電気光学位相変調素子 を挿入したファブリ・ペロー形電気光学変調器または変 形ファブリ・ペロー形電気光学変調器と、レーザ光源と を具える超短光パルス生成器において、出力光パルスの 幅を短くするために、電気光学位相変調素子の位相変調 指数を大きくしても不必要なサテライトパルスを抑止す る。
【解決手段】  反射鏡１、２を対向配置したファブリ・ ペロー光共振器３内に、共振器内の光走行周期に同期し て駆動される電気光学位相変調素子４を挿入したファブ リ・ペロー形電気光学変調器６にレーザ光源１０からレ ーザビームを入射させる超短光パルス生成器において、 電気光学位相変調素子４として、位相変調指数が空間的 に分布したものを用い、電圧印加時に通過する光ビーム に対してはビーム断面内で空間的変調勾配が生じ、共振 器としては高損失になるようにして不必要なサテライト パルスの出現を抑圧する。
Patent JP-2753600-B1 (JP)
Title: 製箱機の不良品識別装置
IPC: B31B50/94
Filed: 1996-12-19
Granted: 1998-05-20
Abstract: 【要約】
【課題】  製品中から、不良品を識別し得るようにす る。装置を小型化する。
【解決手段】折曲げを完了した箱を１枚ずつ送出する送 出コンベアに、箱を互いに重ねながら搬送する完成品コ ンベアを接続する。送出コンベアの側部に所定数毎に箱 を側方へ押出すバッティング装置及びこの箱を受け止め るストッパを設け、計数装置とする。さらにこのストッ パの位置又は方向を変化させるストッパ変位装置を設け る。製箱機の工程中に不良品センサを設け、検知した不 良品についてバッティング装置及びストッパ変位装置を 作動させ、不良品の態様を、通常のものとも計数用のも のと異なるようにする。
Patent JP-3041284-B1 (JP)
Title: 管制用通信システム
IPC: G08G5/00
Filed: 1998-12-18
Granted: 2000-05-15
Abstract: 【要約】
【課題】  音声通信とデータリンク通信の両方が用いら れるような過渡的な状況において、通信が効率的に行え るようにする。
【解決手段】  通信切換部１５において、音声通信送受 信部１１及びデータリンク通信送受信部１３の受信信号 から、通信手段（音声通信かデータリンク通信か）を認 識し、通信手段を自動または手動で切り換える。音声通 信使用時はデータリンク通信系が休止状態となり、デー タリンク通信使用時は音声通信系が休止状態となる。音 声通信の場合、管制指示は現状と同様に音声にて行う。 一方、データリンク通信の場合、送受信メッセージ管理 部２２にて代表的な送信メッセージ候補から選択して行 う、あるいは音声識別部２４の音声認識機能を用いて音 声通信と同様に音声にて行う。
Patent MD-4841-B1 (MD)
Title: Polycyclic-carbamoylpyridone compounds and their pharmaceutical use
Inventor: JIN HAOLUN
IPC: C07D498/18
Filed: 2013-12-19
Abstract: The invention relates to polycyclic carbamoylpyridone compounds with the following Formula (I):(I),including stereoisomers and pharmaceutically acceptable salts thereof, wherein R1, X, W, Y1, Y2, Z1 and Z4 are as defined in the present document. The claimed compounds may be used in the treatment of human immunodeficiency virus (HIV) infection.