JPH0747038B2 - Supercooled heat storage - Google Patents
Supercooled heat storageInfo
- Publication number
- JPH0747038B2 JPH0747038B2 JP62290034A JP29003487A JPH0747038B2 JP H0747038 B2 JPH0747038 B2 JP H0747038B2 JP 62290034 A JP62290034 A JP 62290034A JP 29003487 A JP29003487 A JP 29003487A JP H0747038 B2 JPH0747038 B2 JP H0747038B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- heat
- storage material
- small chambers
- capillary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Central Heating Systems (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は熱エネルギーを過冷却状態で蓄え、必要な時に
蓄えた熱エネルギーを取り出すことができる、繰返し使
用可能な蓄熱体を利用する分野に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of utilizing a reusable heat storage body capable of storing thermal energy in a supercooled state and taking out the stored thermal energy when needed.
従来の技術 従来より潜熱を利用する潜熱蓄熱材は単位重量当りの蓄
熱量が大きい、一定温度の出力が得られるなどの利点を
有するため、コードレスの装身採暖装置・保温装置・加
温装置に用いる試みが行なわれてきた。しかし、従来の
蓄熱体は過冷却を防止した蓄熱材を用いる試みがほとん
どであった。すなわち、蓄熱材は加熱（蓄熱）完了と同
時に放熱を開始するタイプである。したがって必要な時
に放熱させることができず用途が限定されたものとなっ
た。ところが最近過冷却現象を利用した任意の時に蓄熱
材より熱を取り出す手段が試みられてきた。すなわち、
特開昭61−14283号公報あるいは特開昭60−1020号公報
等に過冷却蓄熱体と過冷却を崩壊する手段とが記載され
ている。しかし、この過冷却形蓄熱体を採暖装置などに
用いる場合、次のような問題点があった。すなわち、蓄
熱材は蓄熱時（過冷却時）液体であるため可撓性がある
が、放熱すると固体となるため可撓性がなくなる。この
傾向は固体となり温度が低下すると強くなる。採暖装置
としては可撓性の喪失は致命的である。これを解決する
ために、従来の過冷却を防止した蓄熱材では実開昭57−
87276号公報あるいは実開昭57−85154号公報のように可
撓性を有するシートの一部を接合し複数箇の小室を設
け、この小室に蓄熱材を封入し、前記接合部分の屈折に
より可撓性をもたらせようとする試みが行なわれてき
た。しかし過冷却蓄熱体の場合、熱を取り出すためには
過冷却を崩壊させる手段が必要であり、その手段として
前記特開昭61−14283号公報あるいは特開昭60−1020号
公報に記載されているような刺激を与える必要がある。
このような刺激手段を実開昭57−85154号公報あるいは
実開昭57−8726号公報に記載されている複数箇の小室そ
れぞれに設けることは実用上困難であった。すなわち、
熱を取り出す時に各小室毎にいちいち刺激を与えねばな
らない。また、刺激手段をそれ自体が身体に対して異和
感のあるものであった。Conventional technology Since latent heat storage materials that use latent heat have advantages such as a large amount of heat storage per unit weight and the ability to obtain a constant temperature output, they are suitable for cordless clothing warming / warming / warming devices. Attempts have been made to use it. However, most of the conventional heat storage bodies have tried to use a heat storage material that prevents supercooling. That is, the heat storage material is of a type that starts radiating heat upon completion of heating (heat storage). Therefore, it was not possible to radiate heat when necessary, and the application was limited. However, recently, a means for taking out heat from the heat storage material has been tried at an arbitrary time utilizing the supercooling phenomenon. That is,
Japanese Unexamined Patent Publication (Kokai) No. 61-14283 or Japanese Unexamined Patent Publication (Kokai) No. 60-1020 discloses a supercooled heat storage body and means for collapsing supercooling. However, when this supercooling type heat storage body is used for a heating device or the like, there are the following problems. That is, the heat storage material is liquid because it is a liquid when it stores heat (at the time of supercooling), but it loses flexibility because it becomes a solid when it radiates heat. This tendency becomes solid and becomes stronger as the temperature decreases. Loss of flexibility is fatal for a warming device. In order to solve this, conventional heat storage materials that prevent overcooling have
As disclosed in Japanese Patent No. 87276 or Japanese Utility Model Application Laid-Open No. 57-85154, a part of a flexible sheet is joined to provide a plurality of small chambers, and a heat storage material is enclosed in the small chambers. Attempts have been made to provide flexibility. However, in the case of a supercooled heat storage body, in order to take out heat, a means for collapsing the supercooling is required, and as a means therefor, it is described in the above-mentioned JP-A-61-14283 or JP-A-60-1020. It is necessary to give a stimulus that makes you feel like you are.
It was practically difficult to provide such a stimulating means in each of a plurality of small chambers described in Japanese Utility Model Laid-Open No. 57-85154 or Japanese Utility Model Laid-Open No. 57-8726. That is,
Each room must be stimulated when removing heat. Moreover, the stimulating means itself had a strange feeling to the body.
発明が解決しようとする問題点 本発明は前記蓄熱体の課題を解決しようとするものであ
る。すなわち、過冷却可能な蓄熱体を採暖装置などに用
いた場合、容易に蓄熱でき利便性よく簡単確実に装置全
体の過冷却を崩壊し熱を取り出すことができると共に、
身体に装着した場合可撓性があり異和感のないようにす
るものである。Problems to be Solved by the Invention The present invention is intended to solve the problems of the heat storage body. That is, when a heat storage body capable of supercooling is used in a warming device or the like, heat can be easily stored, and it is possible to conveniently and simply collapse the supercooling of the entire device to take out heat.
When worn on the body, it is flexible and does not give a strange feeling.
問題点を解決するための手段 本発明は上記問題点を解決するために、フィルムまたは
チューブの適当箇所を接合し複数箇の小室を設け、この
小室に過冷却可能で刺激により液体から固体に相変化し
潜熱を放出する蓄熱体を封入すると共に前記小室間にわ
たって毛細管体を設け、さらに前記小室の少なくとも一
つの小室に前記蓄熱材の過冷却状態を崩壊させる刺激体
を封入したものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a plurality of small chambers by joining appropriate portions of a film or a tube, and the small chambers can be supercooled and can be changed from liquid to solid by stimulation. A heat storage body that changes and releases latent heat is enclosed, a capillary body is provided between the small chambers, and a stimulator that collapses the supercooled state of the heat storage material is enclosed in at least one of the small chambers.
作用 本発明は前記構成のため簡単確実に蓄熱材より熱を取り
出すことができると共に可撓性を有する蓄熱体とするこ
とができる。すなわち、前記蓄熱体は過冷却可能で刺激
により容易に過冷却状態が崩壊する蓄熱材が小室に封入
され、各小室が毛細管体により接続されている構成にな
っている。この毛細管体は各小室において蓄熱材と接し
ているため、蓄熱材は毛細現象により毛細管体に吸いあ
げられる。すなわち、毛細管体は蓄熱材で含浸された状
態となっている。したがって、蓄熱体は複数の小室に区
分されているが、蓄熱材は実質的に蓄熱体全体にわたっ
てつながっている。いま、蓄熱体の一つの小室内に設け
られた刺激部に刺激を与えると、この部分で過冷却が崩
壊し蓄熱材は液体から固体へ潜熱を放出しながら相変化
を始める。この過冷却の崩壊は刺激部を有する小室全体
に拡がっていく。次いで毛細管体中の蓄熱材の過冷却が
崩壊し、さらに、隣接する小室の蓄熱材の過冷却が崩壊
する。このように過冷却の崩壊は蓄熱体全体に拡がって
いく。すなわち、一つの小室の蓄熱材の過冷却が崩壊す
るとそれは毛細管体を介して蓄熱体全体の小室に拡がっ
ていく。本発明の過冷却形蓄熱体では可撓性を持たせる
ために、蓄熱体に接合部を設け蓄熱材を複数箇の小室に
分散させても１ケ所の刺激で蓄熱体を構成する全小室の
蓄熱材の過冷却を崩壊することができる。Effect The present invention can easily and surely take out heat from the heat storage material and has a flexible heat storage body because of the above configuration. That is, the heat storage material is configured so that a heat storage material that can be supercooled and whose supercooled state is easily collapsed by stimulation is enclosed in the small chambers, and the small chambers are connected by a capillary body. Since this capillary body is in contact with the heat storage material in each small chamber, the heat storage material is sucked up by the capillary body due to the capillary phenomenon. That is, the capillary body is in a state of being impregnated with the heat storage material. Therefore, the heat storage material is divided into a plurality of small chambers, but the heat storage material is substantially connected to the entire heat storage material. Now, when stimulation is given to a stimulating portion provided in one small chamber of the heat storage body, supercooling collapses at this portion, and the heat storage material starts phase change while releasing latent heat from liquid to solid. The collapse of this supercooling spreads throughout the small chamber having the stimulating portion. Next, the supercooling of the heat storage material in the capillary body collapses, and further the supercooling of the heat storage material in the adjacent small chamber collapses. In this way, the collapse of supercooling spreads throughout the heat storage body. That is, when the supercooling of the heat storage material in one small chamber collapses, it spreads to the small chamber of the entire heat storage body via the capillary body. In the supercooled heat storage body of the present invention, in order to have flexibility, even if the heat storage body is provided with a joint portion and the heat storage material is dispersed in a plurality of small chambers, all the small chambers that constitute the heat storage body are stimulated by one place. The supercooling of the heat storage material can be destroyed.
実施例 以下、本発明の実施例について説明する。第１図は本発
明の蓄熱体１の平面図、第２図は断面図である。蓄熱体
１はフィルムまたはチューブ２の適当箇所を熱融着して
得られた接合部３によって複数箇の小室４に区分された
構成となっている。この小室４には過冷却可能で刺激に
より液体から固体に相変化し潜熱を放出する蓄熱材５が
封入されている。さらに小室４は毛細管体６によりお互
いに連結されている。また、過冷却を崩壊させるための
刺激体７が小室４内に設けられている。Examples Examples of the present invention will be described below. FIG. 1 is a plan view of the heat storage body 1 of the present invention, and FIG. 2 is a sectional view. The heat storage body 1 is divided into a plurality of small chambers 4 by a joint portion 3 obtained by heat-sealing an appropriate portion of a film or a tube 2. A heat storage material 5 which is capable of being supercooled and which changes its phase from a liquid to a solid by stimulation and releases latent heat is enclosed in this small chamber 4. Furthermore, the small chambers 4 are connected to each other by a capillary body 6. Further, a stimulator 7 for collapsing the supercooling is provided in the small chamber 4.
以下、各要素毎に説明する。容器２は蓄熱材５と非反応
性・非相溶性の材料でつくられる。接合部は一対のシー
トを熱融着するか、チューブ等の適当箇所を熱融着する
等の方法で設ける。熱融着以外でも接着剤による接着で
もよい。特に長寿命を必要とする場合はアルミラミネー
トフィルムが良い。以下、２枚のシートを用いた場合を
記す。小室４は周囲を接合部３で囲われたものであり、
使用目的により任意の大きさ、任意の形とすることがで
きる。蓄熱材５は塩化カルシウム６水塩、硫酸ナトリウ
ム10水塩、チオ硫酸ナトリウム３水塩などの水和塩形蓄
熱材であり融点以上に加熱し冷却すると容易に過冷却状
態とすることができる。また、蓄熱材５は必要に応じて
増粘剤、安定剤または熱伝導性物質とを混合する。毛細
管体６は蓄熱材５と非反応性・非相溶性の材料よりなる
繊維質体、例えば、綿・セルロース等の天然繊維または
ポリエステル、アクリル、ナイロン、芳香族ポリアミド
等の合成繊維よりなる糸状体、織布あるいは不織布、ま
たはステンレス、銅等よりなる金属細線体、または各種
連続気泡体よりなる。熱シールは前記毛細管体６を二枚
のシート２の間にはさみ込んで行われ、熱シール後容器
材料に密着し固定される。毛細管体６は熱シール時の熱
に耐える必要があり、熱シール時に融解しシート２材料
と一体となってはならない。毛細管体６が融解しシート
２材料と一体となるともはや毛細管力がなくなり蓄熱材
５融液が浸透してこなくなり過冷却の崩壊がこゝで途切
れてしまうからである。例えばラミネートフィルムの最
内層（融着層）がポリエチレンの場合は、木綿、ポリエ
ステル、ポリアミド等の糸状体がよい。毛細管体の取り
付け位置や取り付け方法は特に限定されるものではな
く、接合部３を介して小室と小室とを結ぶことができた
ら良い。刺激部７は過冷却状態にある蓄熱材に刺激を与
える部分である。刺激を与える手段としては、前記特開
昭60−1020号公報に記述されている方法でもよい。Hereinafter, each element will be described. The container 2 is made of a material that is non-reactive and incompatible with the heat storage material 5. The joining portion is provided by a method such as heat-sealing a pair of sheets or heat-sealing an appropriate portion such as a tube. Adhesion by an adhesive may be used instead of heat fusion. Especially when long life is required, aluminum laminate film is preferable. Hereinafter, the case of using two sheets will be described. The small chamber 4 is surrounded by the joint portion 3,
It may have any size and any shape depending on the purpose of use. The heat storage material 5 is a hydrated salt heat storage material such as calcium chloride hexahydrate, sodium sulfate decahydrate, and sodium thiosulfate trihydrate, and can be easily brought into a supercooled state by heating above the melting point and cooling. Moreover, the heat storage material 5 mixes a thickener, a stabilizer, or a heat conductive substance as needed. The capillary body 6 is a fibrous body made of a material which is non-reactive and incompatible with the heat storage material 5, for example, a filamentous body made of natural fibers such as cotton and cellulose or synthetic fibers such as polyester, acrylic, nylon and aromatic polyamide. , A woven or non-woven fabric, a fine metal wire body made of stainless steel, copper or the like, or various open-cell bodies. The heat sealing is carried out by sandwiching the capillary body 6 between the two sheets 2, and after the heat sealing, it is brought into close contact with and fixed to the container material. The capillary body 6 needs to withstand the heat at the time of heat sealing, and should not melt and not be integrated with the material of the sheet 2 at the time of heat sealing. This is because when the capillary body 6 melts and becomes united with the material of the sheet 2, the capillary force is no longer present, the melt of the heat storage material 5 does not permeate, and the collapse of supercooling is interrupted at this point. For example, when the innermost layer (fusion layer) of the laminate film is polyethylene, filaments of cotton, polyester, polyamide, etc. are preferable. The attachment position and attachment method of the capillary body are not particularly limited, and it suffices if the small chambers can be connected to each other via the joint 3. The stimulator 7 is a part that stimulates the heat storage material in a supercooled state. As a means for giving a stimulus, the method described in JP-A-60-1020 may be used.
以下、具体的な一実施例を示す。A specific example will be described below.
最内層がポリエチレンからなる二枚のアルミラミネート
フィルムの間に毛細管体としてポリエステルからなる糸
をはさみ、熱シールにより5mmの接合部を５×5cmの正方
形の小室の周囲に設ける。この熱シールにあって、すべ
ての小室が毛細管体により少なくとも１ケ所で他の小室
と連結できるように毛細管体をあらかじめ配しておく。
この小室に蓄熱材として酢酸ナトリウム３水塩を20グラ
ムづゝ充填し、減圧下でを封口した。このようにして小
室が１列当り４ケ,2列合計８ケからなる蓄熱体を作成し
た。この蓄熱体の一つの小室に前記特開昭60−1020号公
報に記載されている。ストリップを封入し刺激部とし
た。この蓄熱体を酢酸ナトリウム３水塩の融点58℃より
高い90℃に加熱し蓄熱材を完全に融解した後室温まで冷
却すると、蓄熱材は容易に過冷却状態になった。加熱中
小室の一つに150kgの応力を加えたが、毛細管体より蓄
熱材の流動が極度に限定されているので蓄熱材が他の小
室に移動し偏肉が生ずるようなことはなかった。この過
冷却した蓄熱体を断熱材で覆い刺激部を指圧で刺激する
と容易に過冷却状態が崩壊し蓄熱体全体から熱の放出が
みられた。人体に装着し０℃の雰囲気下で使用したが約
２時間わたって人体側表面で40℃以上の熱出力があっ
た。また、装着した場合、接合部を軸として容易に屈曲
するため、なんら異和感を感じることがなく快適な暖房
が得られた。A polyester thread is inserted as a capillary between two aluminum laminated films whose innermost layer is polyethylene, and a 5 mm joint is provided around a 5 × 5 cm square chamber by heat sealing. In this heat seal, the capillary bodies are arranged in advance so that all the small chambers can be connected to other small chambers at least at one place by the capillary bodies.
20 g each of sodium acetate trihydrate as a heat storage material was filled in this small chamber, and the container was sealed under reduced pressure. In this way, a heat storage body having four small cells in one row and a total of eight rows in two rows was prepared. One of the small chambers of this heat storage body is described in JP-A-60-1020. The strip was enclosed and used as a stimulator. When the heat storage material was heated to 90 ° C. higher than the melting point of sodium acetate trihydrate of 58 ° C. to completely melt the heat storage material and then cooled to room temperature, the heat storage material easily became a supercooled state. A stress of 150 kg was applied to one of the small chambers during heating, but the flow of the heat storage material was extremely limited by the capillary body, so the heat storage material did not move to the other small chambers and uneven thickness did not occur. When the supercooled heat storage body was covered with a heat insulating material and the stimulation part was stimulated with acupressure, the supercooled state was easily collapsed and heat was released from the entire heat storage body. Although it was attached to a human body and used in an atmosphere of 0 ° C, the heat output was 40 ° C or more on the human body side surface for about 2 hours. Further, when it is attached, since it easily bends around the joint, a comfortable heating can be obtained without any discomfort.
発明の効果 以上のように本発明の蓄熱体によれば次の効果が得られ
る。Effects of the Invention As described above, according to the heat storage body of the present invention, the following effects are obtained.
すなわち、本発明の蓄熱体は蓄熱材を封入した複数箇の
小室より形成され、しかも各小室が蓄熱材を含んだ毛細
管体で接続されているため、過冷却状態を崩壊させるた
めの刺激部が１個でもよく、構成が簡単になる。さら
に、刺激部が小室中に設けられているので、蓄熱材が外
部に漏出することがない。また、人体に装着した場合、
小袋と小袋とを結ぶ接合部が屈曲し外部応力に容易に追
従するので、ほとんど異和感を感じない。小室の蓄熱材
と小室の蓄熱材とが毛細管体で結ばれているため、一部
の小室に大きな圧力が加わっても蓄熱材の流動が毛細管
体で阻止され他の小室に移動することがない。したがっ
て蓄熱体に偏肉が生ずることがない。That is, the heat storage body of the present invention is formed by a plurality of small chambers enclosing a heat storage material, and since each small chamber is connected by a capillary body containing the heat storage material, a stimulating portion for collapsing the supercooled state is provided. Only one is required, and the configuration is simple. Further, since the stimulation unit is provided in the small chamber, the heat storage material does not leak outside. Also, when attached to the human body,
The joint between the pouches bends and easily follows the external stress, so there is almost no discomfort. Since the heat storage material of the small chamber and the heat storage material of the small chamber are connected by the capillary, even if a large pressure is applied to some small chambers, the flow of the heat storage material is blocked by the capillary and does not move to other small chambers. . Therefore, uneven thickness does not occur in the heat storage body.
以上のごとく、本発明の蓄熱体構成によれば、簡単に過
冷却状態を崩壊させ熱を取り出すことができると共に可
撓性を有するため異和感のない蓄熱体とすることができ
る。As described above, according to the configuration of the heat storage body of the present invention, the supercooled state can be easily collapsed to take out heat, and since the heat storage body has flexibility, a heat storage body having no discomfort can be obtained.
第１図は本発明の一実施例の過冷却等蓄熱体の平面図、
第２図は同断面図である。 １……蓄熱体、２……シート、３……接合部、４……小
室、５……蓄熱材、６……毛細管体、７……刺激部。FIG. 1 is a plan view of a supercooling heat storage body according to an embodiment of the present invention,
FIG. 2 is a sectional view of the same. 1 ... Heat storage body, 2 ... Sheet, 3 ... Joint, 4 ... Small chamber, 5 ... Heat storage material, 6 ... Capillary body, 7 ... Stimulator.
Claims (1)
と、この小室に封入された過冷却可能で刺激により液体
から固体に相変化し潜熱を放出する蓄熱材と、前記接合
部に設けられ前記小室間にわたる毛細管体と、前記小室
の少なくとも一つに封入され前記蓄熱材の過冷却状態を
崩壊させる刺激体とより構成された過冷却形蓄熱体。1. A plurality of small chambers divided by a joint, a heat storage material enclosed in the small chambers, which is capable of being supercooled and which changes a phase from a liquid to a solid by a stimulus to release latent heat, and provided in the joint. A supercooled heat storage body comprising a capillary body extending between the small chambers, and a stimulating body which is enclosed in at least one of the small chambers and collapses a supercooled state of the heat storage material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290034A JPH0747038B2 (en) | 1987-11-17 | 1987-11-17 | Supercooled heat storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290034A JPH0747038B2 (en) | 1987-11-17 | 1987-11-17 | Supercooled heat storage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131657A JPH01131657A (en) | 1989-05-24 |
| JPH0747038B2 true JPH0747038B2 (en) | 1995-05-24 |
Family
ID=17750927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62290034A Expired - Fee Related JPH0747038B2 (en) | 1987-11-17 | 1987-11-17 | Supercooled heat storage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0747038B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645181Y2 (en) * | 1988-07-04 | 1994-11-16 | エヌオーケー株式会社 | Heat storage material pack |
| JP5998683B2 (en) * | 2012-07-05 | 2016-09-28 | 三菱樹脂株式会社 | Flooring with heat storage function |
-
1987
- 1987-11-17 JP JP62290034A patent/JPH0747038B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01131657A (en) | 1989-05-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |