baber/WOPTO huggingface dataset:
Patent WO-2021075418-A1 (WO)
Inventor: FUJII MASASHI
IPC: A61B1/045
Filed: 2020-10-13
Abstract: Provided is an image processing method comprising: a first acquisition step S1 for acquiring a first medical image obtained by photographing or depicting an observation target; a first extraction step S4 for extracting a feature amount of the first medical image; a second acquisition step S8 for acquiring a second medical image obtained by photographing or depicting the observation target; a second extraction step S10 for extracting a feature amount of the second medical image; a comparison step S11 for comparing the feature amount of the first medical image with the feature amount of the second medical image; and a positional relationship specifying step S13 for specifying a positional relationship between the first medical image and the second medical image, on the basis of a comparison result of the comparison step S11.
Patent WO-2021079944-A1 (WO)
Inventor: FUJITA ETSUNORI
IPC: A61B5/11
Filed: 2020-10-22
Abstract: 正確かつ簡易に生体信号を測定でき、日常の健康管理を促す。　三次元立体編物からなる人体当接側クッション部材１０が平面視で略円形に形成されている。また、ベースクッション部材２０も平面視で略円形に形成されている。方形のものに着座等すると、角部付近を中心として端縁がめくれたり折れたりするなど変形が生じやすい。このような変形が生じると検出データに歪みが生じやすい。また、折れなどが生じると違和感になる。これに対し、略円形の場合には、このような折れなどの発生は抑制される。
Patent WO-2021157152-A1 (WO)
Title: Power amplification circuit, high-frequency circuit, and communication device
Inventor: TAHARA KENJI
IPC: H03F3/24
Filed: 2020-11-09
Abstract: The objective of the present invention is to suppress gain. In a power amplification circuit (10), a first transistor (Q1) has a first input terminal (11), a first output terminal (12), and a first ground terminal (13). A second transistor (Q2) has a second input terminal (21), a second output terminal (22), and a second ground terminal (23). The second input terminal (21) is connected to the first input terminal (11). The second output terminal (22) is connected to the first output terminal (12). A first bias circuit (5) is connected to the first input terminal (11). A second bias circuit (6) is connected to the second input terminal (21). A first resistor (R1) is connected between the first ground terminal (13) and ground. A second resistor (R2) is connected between the second ground terminal (23) and ground. The resistance value of the second resistor (R2) is greater than the resistance value of the first resistor (R1).
Patent WO-2021117438-A1 (WO)
Inventor: TODAKA Takumi
IPC: B65D33/00
Filed: 2020-11-18
Abstract: Provided is a container, with a zipper, comprising a container body that has a first surface facing a housing space, and an elongated member that is joined to the first surface and defines one side of the housing space. The elongated member has a cross-sectional shape that includes: a first base strip joined to the first surface; a second base strip which partially faces the first base strip, and which is joined to the first surface in a region that is positioned on the opposite side, of the elongated member, with respect to the housing space in the widthwise direction and that does not face the first base strip; mutually engageable first and second engaging parts that respectively project from the first and second base strips; and a tear-away strip that is formed separated from the first base strip in the widthwise direction of the elongated member, and that is joined to the first surface.
Patent WO-2021260965-A1 (WO)
Inventor: KACHU Yoshimasa
IPC: B63H23/36
Filed: 2020-11-20
Abstract: Provided is a bearing for supporting the propulsion shaft of a ship, with which it is possible to form a water coating with excellent lubricating characteristics on a sliding surface between the bearing and the propulsion shaft, and which is excellent in wear resistance and is economical.　A bearing according to the present invention supports the propulsion shaft of a ship and includes, on an inner peripheral surface of a cylindrical shell, a sliding layer and an elastic layer in this order in the radial direction from the cylinder center, wherein the sliding layer has: a load action portion which is on the lower surface side of the inner peripheral surface of the shell and on which a load of the propulsion shaft acts, the center angle θ thereof being in a range of θ=60°-180° with the axis of symmetry being the vertical axis; and a cooling action portion which opposes the load action portion and is provided with a plurality of required water cooling grooves on both ends being the first and last. The vertical axis refers to the axis of symmetry of a lateral cross section of the shell parallel to the center of gravity direction of the propulsion shaft.
Patent WO-2021107039-A1 (WO)
Inventor: SHINOZUKA YUKIO
IPC: B25J15/04
Filed: 2020-11-26
Abstract: A robot hand comprising a motor having a rotation shaft, an accommodation member that accommodates a tip-end part of the rotation shaft, a plurality of swing members that swing with respect to the accommodation member as the rotation shaft rotates, and a plurality of claw members that respectively swing with the plurality of swing members. The rotation shaft has a worm gear part formed on the outer circumference thereof. The swing members each include, on a part of the outer circumference thereof, a worm wheel part that is engaged with the worm gear part and, on a part of the outer circumference thereof, a fixing surface provided on a side opposite to the rotation shaft via a swing center of the swing member. The claw members are each removably fixed to the fixing surface by a first fixing member, and the accommodation member removably exposes the first fixing member.
Patent WO-2021117867-A1 (WO)
Inventor: KISHIDA HIROTAKA
IPC: F16H63/18
Filed: 2020-12-11
Abstract: [Problem] To realize a structure with which the transmission route of motive power can be switched by an electric actuator. [Solution] On the basis of the rotation of a drive cam 50, a motive power transmission route switching device 5 switches between: a first mode in which a friction engagement device 40 is connected and a rotation transmission state switching device 41 has been switched to a free mode; a second mode in which the friction engagement device 40 is disconnected and the rotation transmission state switching device 41 has been switched to a lock mode; and a switch mode in which the rotation transmission state switching device 41 has been switched to a one-way clutch mode, the switch mode being established during switching from the second mode to the first mode.
Patent WO-2022130439-A1 (WO)
Inventor: HATA SHUNJI
IPC: H02J50/05
Filed: 2020-12-14
Abstract: 非接触給電システム（１）は、直流電源（２１）から出力された直流電力を交流電力に変換する電力変換器（２２）と、電力変換器（２２）で変換された交流電力が印加される送電電極（２４）と、受電電極（３１）を有し送電電極（２４）と受電電極（３１）との間の容量結合により電力を受電し負荷（３５）に給電する受電装置（３）と、送電電極（２４）の電圧を検出する電圧検出部（２６）と、電圧検出部（２６）により検出された電圧（Ｖｓ）に基づき、直流電源（２１）または電力変換器（２２）を制御する制御部（２７）と、を備え、電圧検出部（２６）は、電圧検出用電極（２５）を有し、送電電極（２４）と電圧検出用電極（２５）との間の容量結合により送電電極（２４）の電圧を検出する。
Patent WO-2021176816-A1 (WO)
Inventor: YAMAGUCHI TADASHI
IPC: H01F5/04
Filed: 2020-12-24
Abstract: [Problem] To provide: an insulated wire capable of increasing a partial discharge start voltage, preventing the deterioration of an insulating body, and not deteriorating a space factor; a coil using the insulated wire; a thickness changing insulating tape used in manufacturing the insulated wire; and a method for manufacturing the thickness changing insulating tape. [Solution] The above problem is solved by an insulated wire 10 for a coil, which has a conductor 1 and insulating coverings 2, 3 provided on the outer circumference of the conductor 1 and is constituted by the thick insulating covering 3 for a region where voltage increases and a partial discharge easily occurs when wound into a coil and the thin insulating covering 2 for a region where the voltage does not increase and the partial discharge hardly occurs, wherein the the thick insulating covering 3 and the thin insulating covering 2 are repeatedly provided at arbitrary intervals. The above problem is also solved by a coil 40 which is obtained by winding this insulated wire 10 and formed so that the insulating covering 3 of the insulated wire 10 in the region where the partial discharge easily occurs is thick and the insulating covering 2 of the insulated wire 10 in the region where the partial discharge hardly occurs is thin.
Patent JP-WO2019159759-A1 (JP)
Title: 操作検出装置及び操作検出方法
IPC: G06F3/0346
Filed: 2019-02-05
Abstract: 一実施形態の操作検出装置は、操作部に接近する対象物を検出する操作検出装置である。この操作検出装置は、対象物との距離を複数の画素として検出するセンサと、対象物を検出する対象物検出部と、を備える。対象物検出部は、複数の画素のうち距離が最も短い最短距離に対応する第１画素を特定し、第１画素の周囲に位置する複数の第２画素を走査し、複数の第２画素のうち、各第２画素に対応する距離と最短距離との差が一定値以下である第２画素の数が所定数以上ある場合に、対象物を検出する。
Patent JP-WO2020066652-A1 (JP)
Title: 積層フィルムの分離回収方法
IPC: C08J11/16
Filed: 2019-09-12
Abstract: 反応性接着剤でラミネート接着された積層フィルムの分離回収方法であって、前記積層フィルムを２０〜９０℃の加熱攪拌または超音波振動させながらアルカリ溶液に積層フィルムを浸漬する工程１と、分離した各層の単層フィルムを回収する工程２とを有することを特徴とする、積層フィルムの分離回収方法。前記反応性接着剤が、ポリイソシアネート組成物とポリオール組成物とを含有する反応性接着剤であることが好ましく、ポリイソシアネート組成物とポリオール組成物と、酸性基を有する化合物を含有する反応性接着剤であることがなお好ましい。
Patent JP-WO2019187050-A1 (JP)
Title: 中空樹脂成形品の製造方法及び中空樹脂成形品の製造装置
IPC: B29C45/46
Filed: 2018-03-30
Abstract: 中空樹脂成形品の製造技術の更なる向上を図ること。成形型８０のキャビティ８３に溶融状態の樹脂材料ｒを注入する樹脂注入工程と、前記キャビティ８３に接続されたインジェクタ２を介して、前記樹脂材料ｒの注入された前記キャビティ８３にガスａ及び液体ｗを注入して、前記キャビティ８３内の前記樹脂材料ｒに中空部ｈを形成する中空部形成工程と、前記キャビティ８３内の前記液体ｗを前記キャビティ８３の外部に排出する排出工程と、を有し、前記中空部形成工程は、前記インジェクタ２に圧縮状態のガスａを注入し次いで前記ガスａよりも高圧に加圧された液体ｗを注入する加圧工程を有し、前記インジェクタ２は、前記キャビティ８３における鉛直方向の最下端部に接続され、前記排出工程において、前記インジェクタ２を介して前記液体ｗを排出する、中空樹脂成形品の製造方法。
Patent JP-WO2019198129-A1 (JP)
Title: 制御システム、空気調和機およびサーバ
IPC: F24F11/64
Filed: 2018-04-09
Abstract: 第１地域にある建物に設置された空気調和機（１０）が備える制御装置（１７）の情報取得部（３１）は、第１時間帯における第１地域の環境条件が第１時間帯よりも前の第２時間帯における第１地域から離れた第２地域の環境条件と類似すると判定される場合に、第２地域にある建物に設置された空気調和機（８０）により第２時間帯において運転中に得られた運転情報（４１）を取得する。制御装置（１７）の運転制御部（３２）は、空気調和機（１０）の運転を、情報取得部（３１）により取得された運転情報（４１）に基づいて第１時間帯よりも前から先回りして制御する。
Patent JP-WO2019208791-A1 (JP)
Title: 電池、電池パック、電子機器、電動車両および蓄電システム
IPC: H01M10/052
Filed: 2019-04-26
Abstract: 電池は、正極と、負極と、電解液とを備える。正極は、融点が１６６℃以下であるフッ素系バインダーを含む正極活物質層を有する。正極活物質層中におけるフッ素系バインダーの含有量が、０．７質量％以上２．８質量％以下である。電解液が、カルボン酸エステルを含み、カルボン酸エステルの炭素数が、４以上１０以下である。【選択図】図１
Patent JP-WO2020013009-A1 (JP)
Title: 含フッ素重合体、膜及び医療用具
IPC: C08F20/26
Filed: 2019-07-01
Abstract: タンパク質等の生体成分が吸着しにくい、生体親和性に優れた含フッ素重合体、前記含フッ素重合体を用いた膜及び医療用具の提供。メトキシエチルアクリレートに基づく単位と、含フッ素部分とを有する含フッ素重合体であって、前記メトキシエチルアクリレートに基づく単位の含有量が、前記含フッ素重合体の総質量に対して５０質量％以上であり、前記含フッ素部分が、融点が３７℃以下の含フッ素重合開始剤に基づく部分、ガラス転移温度が３７℃以下の含フッ素マクロ開始剤に基づく部分、融点が３７℃以下の含フッ素単量体に基づく単位、及びガラス転移温度が３７℃以下の含フッ素マクロモノマーに基づく単位からなる群から選ばれる少なくとも１種であり、前記含フッ素部分の含有量が、前記含フッ素重合体の総質量に対して０．１〜１６質量％である、含フッ素重合体。
Patent JP-WO2020105154-A1 (JP)
Title: データ分析システム及びデータ分析方法
IPC: G06Q10/06
Filed: 2018-11-21
Abstract: データ分析システムであって、人物の生産性に関する目的指標と人物の活動場所の環境に関する環境指標との関連を示す数理モデルを保持する記憶部と、センサから取得した人物の活動場所の環境に関するデータである環境データと、人物によって入力された人物の活動に関する目標を含む業務目標データとを受け付け、業務目標データと数理モデルとに基づいて、人物の生産性を高めるのに適した環境指標の条件を探索し、環境指標の条件と環境データとに基づいて、人物の生産性を高めるのに適した活動場所に関する情報を探索し、探索によって得られた活動場所に関する情報を出力する推奨処理部と、を有する。
Patent JP-WO2020262673-A1 (JP)
Title: プログラム、情報処理方法及び情報処理装置
IPC: G06Q50/30
Filed: 2020-06-26
Abstract: 情報処理装置は、複数の乗客が相乗りする車両の利用を既に予約している前記乗客の乗車地点又は降車地点と、該乗客の乗車時刻又は降車時刻とを示す第１乗客情報を取得する第１取得部と、前記車両を利用する新たな前記乗客の乗車地点又は降車地点と、該乗客の乗車時刻又は降車時刻とを示す第２乗客情報を取得する第２取得部と、前記第１及び第２乗客情報に基づき、前記乗客を乗車又は降車させながら運行する経路を示す運行計画を生成する生成部とを備えることを特徴とする。
Patent WO-2021171821-A1 (WO)
Inventor: OKAMURA KATSUMASA
IPC: A61F7/10
Filed: 2021-01-15
Abstract: [Problem] To propose a head cooling cap set for medical purpose that can cool the scalp at an improved efficiency, gives no sense of oppression to a wearer and does not slip. [Solution] A head cooling cap set for medical purpose configured from a heat cooling cap, an inner cap and an outer cap, characterized in that: the outer cap is provided with two first belts which are drawn respectively from both sides of the opening, extend outward and can be connected together by a first stopper so that, after a wearer puts the head in the opening and wears the cap, the belts can be fastened by the stopper at the back of the neck; and two second belts extending from the vicinity of the central edge of the back part to the front edge can be connected together by a second stopper so that, after the wearer puts the head in the opening and wears the cap, the second belts can be fastened by the stopper around the forehead.
Patent WO-2022168319-A1 (WO)
Inventor: KOYAMA TATSUYA
IPC: B64G1/22
Filed: 2021-02-08
Abstract: 伸展ブーム（１２０）は、筒形に巻かれた状態から筒形の短手方向の一方である伸展方向に伸展される。筒形の長手方向における一端と他端とのそれぞれには突起部（１２５）と窪み部（１２６）とが交互に形成されている。一端における突起部（１２５）は他端における窪み部（１２６）と対向している。一端における窪み部（１２６）は他端における突起部（１２５）と対向している。伸展ブーム（１２０）は、筒形に巻かれた状態から伸展方向に沿って伸展される際に、一端における突起部（１２５）と他端における窪み部（１２６）とが噛み合い、一端における窪み部（１２６）と他端における突起部（１２５）とが噛み合い、伸展方向に沿って筒状の形状が構成される。
Patent WO-2022176100-A1 (WO)
Inventor: KATSU Kouhou
IPC: G06Q40/00
Filed: 2021-02-18
Abstract: A data processing device 1 comprises: an extraction unit 152 which extracts, from invoice data, a plurality of sets of item data that indicate a plurality of items including the product name and amount shown on an invoice; an identification unit 153 which identifies the issuer of the invoice corresponding to the invoice data; a determination unit 154 which, on the basis of the identified issuer, determines whether to generate journalization data corresponding to compound journal entry or journalization data corresponding to single journal entry from the extracted plurality of sets of item data; a generation unit 155 which generates journalization data corresponding to compound journal entry on the basis of the plurality of sets of item data if it is determined that journalization data corresponding to compound journal entry is to be generated, or generates journalization data corresponding to single journal entry on the basis of the plurality of sets of item data if it is determined that journalization data corresponding to single journal entry is to be generated; and an output unit 156 which outputs the generated journalization data.
Patent WO-2021182414-A1 (WO)
Title: Method for manufacturing actuator, and actuator
Inventor: KODA YUTA
IPC: F16H1/06
Filed: 2021-03-08
Abstract: The present invention facilitates the work of accommodating a deceleration mechanism including a scissors gear in a gear case. The angular positions of gear teeth of a first gear (11) and the angular positions of gear teeth of a scissors gear (12) are matched against the elastic force of a torsion spring (19), and in this state, the angular positions are fixed by a fixing member (82) (position fixing step). The first gear (11), the scissors gear (12), and a second gear (13) are accommodated in a gear case (20), and the gear teeth of the second gear (13) are caused to engage with the gear teeth of the first gear (11) and the gear teeth of the scissors gear (12) (gear accommodation step). The fixing of the angular position of the first gear (11) and the angular position of the scissors gear (12) by the fixing member (82) is released through an opening (21e) formed in the gear case (20).
Patent WO-2021187333-A1 (WO)
Title: Image capturing device, and gain ratio acquisition method for same
Inventor: TABATA HIDENORI
IPC: H04N5/378
Filed: 2021-03-11
Abstract: The objective of the present invention is to shorten the time required for calibration between gains in a level adjusting circuit.　The level adjusting circuit performs level adjustment of analog signals output to vertical signal lines corresponding to each column of a pixel array, using either of mutually different first and second gains. An analog to digital converter converts the level-adjusted analog signals to digital signals. A test signal generating unit generates mutually different first and second test signals. A gain ratio acquiring unit supplies the first test signal to one of the vertical signal lines, and simultaneously supplies the second test signal to another of the other vertical signal lines, and acquires the gain ratio between the first gain and the second gain of the level adjusting circuit.
Patent WO-2022054314-A1 (WO)
Inventor: TAKAMI YOSHIO
IPC: B66B7/12
Filed: 2021-03-12
Abstract: ワイヤロープ検査装置は、ワイヤロープ（Ｗ）に対して磁束を印加する励磁部と、ワイヤロープ（Ｗ）に対して相対的に移動しながらワイヤロープ（Ｗ）の磁束を検知する検知コイル（２０）と、を備える。検知コイル（２０）は、ワイヤロープ（Ｗ）が延びる方向と直交する方向におけるワイヤロープ（Ｗ）に対する検知コイル（２０）からの距離であるセンサ離間距離（Ｄ１、ｄ１、Ｄ２、および、ｄ２）を変更可能に構成されている。
Patent WO-2021201125-A1 (WO)
Title: 撥水シート、および、撥水シートの製造方法
Inventor: HOSHI Sayaka
IPC: D21H19/10
Filed: 2021-03-31
Abstract: 撥水シートは、繊維基材と、多孔質部と、撥水膜とを備える。多孔質部は、ラジカル重合性モノマーの重合体を含み、繊維基材が有する２つの面のうちの少なくとも一方の面と、繊維基材が含む繊維間の間隙とに位置する。撥水膜は、多孔質部の表面上に位置する。多孔質部は、撥水シートの厚さ方向の全体に渡って、繊維基材の２つの面の各々と繊維間の間隙とに位置する。
Patent WO-2021201257-A1 (WO)
Inventor: MIYACHI KOICHI
IPC: G02F1/139
Filed: 2021-04-01
Abstract: This liquid crystal display element 10 comprises: a first substrate 11; a second substrate 12 disposed to face the first substrate 11; and a liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12 and containing liquid crystal molecules having a negative dielectric anisotropy. The liquid crystal display element 10 has a plurality of pixels 30. The liquid crystal display element 10 has a photoalignment film or a polymer layer. Each pixel 30 has a plurality of orientation regions in which the orientation directions of the liquid crystal molecules are different from each other. The liquid crystal layer 13 contains a chiral agent, the liquid crystal molecules are twisted and oriented between the first substrate 11 and the second substrate 12 in a state in which a voltage is applied, and the twisting directions of the liquid crystal molecules in the plurality of orientation regions are the same.
Patent WO-2022219752-A1 (WO)
Title: Communication control system, communication control method, and program
Inventor: SASAKI MOTOHARU
IPC: H04W24/08
Filed: 2021-04-14
Abstract: A communication control system according to the present invention comprises: an acquisition unit that acquires information pertaining to a wireless communication device and environmental information which affects wireless communication quality; a prediction unit that predicts future wireless communication quality on the basis of the information pertaining to the wireless communication device and the environmental information; a control unit that controls a target device on the basis of the future wireless communication quality so as to achieve wireless communication quality according to the intention of a user who uses wireless communication; and a coordination unit that operates the acquisition unit, the prediction unit, and the control unit, so as to implement a cycle consisting of acquisition of the information by the acquisition unit, prediction of the future wireless communication quality by the prediction unit, and control of the target device by the control unit.
Patent WO-2021210662-A1 (WO)
Inventor: NOZAKI SHINYA
IPC: A61P37/06
Filed: 2021-04-16
Abstract: 本発明の課題は、タンパク質製剤、特に、抗体製剤の原薬溶液の着色を除去する方法、それを一部の工程に含むタンパク質製剤の原薬溶液の製造方法および高濃度化された無色の当該製剤原薬溶液を提供することにある。　本発明は、タンパク質製剤、特に、抗体製剤の原薬溶液に含まれる着色原因となる終末糖化産物を陰イオン交換クロマトグラフィーにて除去する方法を提供する。この方法により、無色の製剤原薬溶液を提供することが可能となった。
Patent WO-2021230008-A1 (WO)
Title: Battery
Inventor: TAMURA TAKAAKI
IPC: H01M50/155
Filed: 2021-04-19
Abstract: This battery comprises: an electricity generation element having at least one unit cell including an electrode layer, a counter electrode layer, and an electrolyte layer positioned between the electrode layer and the counter electrode layer; and an insulating member that covers the electricity generation element. The insulating member is provided with: a first member that includes a first primary surface covering section that covers a first primary surface of the electricity generation element; and a second member that includes a second primary surface covering section that covers a second primary surface of the electricity generation element opposite to the first primary surface, the second member being joined to the first member. The joined section between the first member and the second member overlaps a side surface of the electricity generation element when viewed from a direction perpendicular to the side surface, and the elastic modulus of the first member is greater than the elastic modulus of the second member.
Patent WO-2022070494-A1 (WO)
Inventor: SAWADA RYUJI
IPC: C12M1/00
Filed: 2021-04-27
Abstract: A data processing system (1) comprising an information processing device (2) and an information display device (4), the information processing device (2) comprising: a data registration unit (8) configured to register a plurality of data items, acquired by a predetermined data acquiring device (6), as data to be handled by the data processing system (1) in which the data and at least one type of accompanying information about each of the data items are associated with each other; a registration data holding unit (10) for holding the data registered by the data registration unit (8); a data tree creating unit (12) which, using an optionally selected type of the accompanying information, classifies the plurality of data items held by the registration data holding unit (10) into groups so that the data with common accompanying information belong to the same group, and which creates a virtual data tree indicating the state of grouping of the plurality of data items; and an information display unit (14) configured to display the data tree created by the data tree creating unit (12) on the information display device (4).
Patent WO-2022034724-A1 (WO)
Title: Wiring device
Inventor: FUNABASHI YASUMASA
IPC: H05K7/14
Filed: 2021-05-21
Abstract: This wiring device is provided with a flexible substrate and a casing for housing the flexible substrate. The flexible substrate has a three-dimensional shape having a first linear part, a second linear part, and a linking part that is provided between the first linear part and the second linear part so as to be convex towards the reverse surface side of the flexible substrate, the linking part linking the first linear part and the second linear part so that the first linear part and the second linear part form a prescribed relative angle in plan view. The casing has a first housing part for housing the first linear part, a second housing part for housing the second linear part, and a third housing part that is provided in a concave shape between the first housing part and the second housing part, the third housing part housing the linking part and holding the linking part.
Patent WO-2021241754-A1 (WO)
Title: Composite particle, negative electrode active material, and lithium secondary battery
Inventor: KAWAGUCHI Naoto
IPC: C01B32/05
Filed: 2021-05-28
Abstract: The present invention pertains to a composite particle containing silicon and carbon, wherein when volume distribution information of domain sizes obtained by fitting a small-angle X-ray scattering spectrum of the composite particle with a sphere model in a carbon-vacancy binary system is accumulated in ascending order, the vacancy region having a domain size of 2 nm or less is 44-70 vol%, and the true density is 1.80 g/cm 3  to 2.20 g/cm 3  as calculated from a dry density measured by a constant volume expansion method using helium gas.