JP2531179B2 - Poultice - Google Patents
PoulticeInfo
- Publication number
- JP2531179B2 JP2531179B2 JP62118400A JP11840087A JP2531179B2 JP 2531179 B2 JP2531179 B2 JP 2531179B2 JP 62118400 A JP62118400 A JP 62118400A JP 11840087 A JP11840087 A JP 11840087A JP 2531179 B2 JP2531179 B2 JP 2531179B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- poultice
- adhesive
- cloth
- swellable
- 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 - Lifetime
Links
Landscapes
- Medicinal Preparation (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は湿布剤に関し、更に詳しくは用時水を含ませ
る湿布剤に関する。TECHNICAL FIELD The present invention relates to poultices, and more particularly to poultices containing water before use.
(従来の技術) 湿布剤は、炎症部位の冷却、薬物の局所作用、患部の
保護などを目的とするものであるが、薬物の経皮吸収や
炎症部位の冷却には湿布剤中に多量の水を保持させてお
く必要がある。(Prior Art) A poultice is intended for cooling an inflamed area, local action of a drug, protection of an affected area, etc. However, a large amount of poultice is contained in the poultice for percutaneous absorption of a drug and cooling of an inflamed area. It is necessary to keep water.
従来は、湿布剤として粘着性保水層を支持布に伸展し
たものが用いられているが、これらの湿布剤は保存中に
水を分離したり、水を失って硬化するなど長期の保存に
耐えないばかりか、水を多量に含むため重く嵩ばって輸
送や保存に不便であった。Conventionally, as a poultice, an adhesive water retention layer extended on a support cloth is used, but these poultices resist long-term storage such as separation of water during storage or loss of water and hardening. Not only that, but it was heavy and bulky because it contained a large amount of water, which was inconvenient for transportation and storage.
このため、通水性基布と不通水性基布との間に水不溶
性吸水樹脂粉末をサンドイッチ状に挿入した、保水層と
なるべき支持体を、不通水性基布の面で薬物含有粘着剤
層と接合させ、用時水で濡らす湿布剤が工夫されている
(特公昭61−24367号公報)。Therefore, the water-insoluble water-absorbent resin powder is inserted in a sandwich form between the water-permeable base cloth and the water-impermeable base cloth, a support to be a water-retaining layer, and a drug-containing pressure-sensitive adhesive layer on the surface of the water-impermeable base cloth. A poultice that is bonded and wet with water when used has been devised (Japanese Patent Publication No. 61-24367).
(発明が解決しようとする問題点) しかしながら、前記湿布剤において用いる吸水樹脂は
粉末であるから、これを繊維状マトリックスに固定する
ためには、これをポリエチレン不織布に均一に散布し、
その上から他の基布を重さねせサンドイッチ状とし、こ
れに水蒸気をあてて含水ゲル化させた後にまた乾燥し、
エンボスロールにかけるか、または紙または紙に類する
ものにあらかじめ吸水樹脂粉末を金飯に散布してシート
状とし、これを前記の二枚の基布の間にセットし、周縁
部を熱封着するなどの煩雑な製造工程を多数経なければ
製品とすることができない。(Problems to be solved by the invention) However, since the water-absorbent resin used in the poultice is a powder, in order to fix it to the fibrous matrix, it is uniformly dispersed on a polyethylene nonwoven fabric,
On top of that, another base cloth is layered to form a sandwich, and steam is applied to this to make a water-containing gel, and then dried again,
Place it on an embossing roll, or sprinkle water-absorbent resin powder on a piece of paper or something similar to paper in advance to form a sheet, set it between the above two base cloths, and heat seal the periphery. A product cannot be manufactured without going through many complicated manufacturing steps such as
また、これらの湿布剤を切断、小分けして使用する
と、吸水樹脂粉末が膨出して二枚の基布の間からあふれ
出る。更にまた、これらの湿布剤は通常の湿布としては
有効であっても、強冷する必要がある場合の湿布として
は必ずしも適しているとは言い難い。Further, when these poultices are cut and used in small portions, the water-absorbent resin powder swells and overflows between the two base fabrics. Furthermore, even though these poultices are effective as normal poultices, it is hard to say that they are necessarily suitable as poultices when strong cooling is required.
(問題点を解決するための手段) 本発明者らは、従来品の問題点を解決すべく種々研究
の結果、保水層として親水性架橋重合体を合成繊維に結
合させた吸水膨潤性繊維布状体と加水冷却剤を併用する
ことによりこれらの問題点が解決されることを見いだ
し、本発明を完成した。(Means for Solving Problems) As a result of various studies to solve the problems of the conventional products, the present inventors have found that a water-swellable fiber cloth in which a hydrophilic crosslinked polymer is bonded to synthetic fibers as a water retention layer. It has been found that these problems can be solved by using a water-like material and a water-cooling agent together, and completed the present invention.
本発明の湿布剤は、親水性架橋重合体を合成繊維に結
合させた繊維からなり、吸水量が30ml/g以上で乾燥状態
にある吸水膨潤性繊維布状体の片側に粘着剤層を設ける
とともに、加水冷却物質を、前記粘着剤層に混練させる
か、前記粘着剤層と前記吸水膨潤性繊維布状体の間に存
在させるか、または前記吸水膨潤性繊維布状体の非粘着
面に存在させた湿布剤である。The poultice of the present invention comprises a fiber in which a hydrophilic cross-linked polymer is bonded to a synthetic fiber, and a water-absorption amount of 30 ml / g or more is provided with a pressure-sensitive adhesive layer on one side of a water-swellable fiber cloth in a dry state. Along with, a water-cooling substance is kneaded into the pressure-sensitive adhesive layer, or is present between the pressure-sensitive adhesive layer and the water-swellable fiber cloth body, or on the non-sticky surface of the water-swellable fiber cloth body. The poultice that was present.
本発明において、親水性架橋重合体を合成繊維に結合
させた繊維とは親水性架橋重合体と合成繊維とが通常の
力では分離しない程度に結合して繊維を形成していれば
よく、たとえばアクリル繊維などの合成繊維を芯とし、
その芯の周りにポリアクリル酸ナトリウムなどの親水性
架橋重合体からなる外層を設けたもの、アクリル酸ナト
リウムとアクリルアミドとの共重合体などがある。In the present invention, the fiber in which the hydrophilic crosslinked polymer is bonded to the synthetic fiber may be such that the hydrophilic crosslinked polymer and the synthetic fiber are bonded to each other to such an extent that they are not separated by normal force to form a fiber. With synthetic fibers such as acrylic fiber as the core,
There are a core provided with an outer layer made of a hydrophilic cross-linked polymer such as sodium polyacrylate, a copolymer of sodium acrylate and acrylamide, and the like.
これらの繊維は吸水量が30ml/g以上、好ましくは150m
l/g以上である。These fibers have a water absorption of 30 ml / g or more, preferably 150 m
l / g or more.
これらの繊維を単独で、または他の繊維と混紡して不
織布、織布などの、伸縮性または非伸縮性の布状体に形
成する。These fibers are spun alone or mixed with other fibers to form a stretchable or non-stretchable cloth-like body such as a non-woven fabric or a woven fabric.
このような布状体としてランシールF〔商品名、日本
エクスラン工業(株)製〕、スミカゲルFタイプ〔商品
名、住友化学工業(株)製〕などの吸水膨潤性繊維を用
いることができる。As such a cloth-like material, water-swellable fibers such as Lanseal F [trade name, manufactured by Nippon Exlan Co., Ltd.] and Sumikagel F type [trade name, manufactured by Sumitomo Chemical Co., Ltd.] can be used.
粘着剤とは、親油性粘着物質(天然ゴム、イソプレン
ゴム、スチレン−イソプレン−スチレン共重合体、ス
チレン−ブタジエン−スチレン共重合体、スチレン−ブ
タジエンゴム、ポリアクリル酸エステルなど)または親
水性粘着物質(カルボキシビニルポリマー、ポリビニル
ピロリドン、ポリアクリル酸ナトリウムなど)にコルチ
コステロイド類、麻酔剤、抗ヒスタミン剤、抗菌剤、抗
真菌剤、鎮痛消炎剤、抗生物質、湿布剤常用薬(カンフ
ル、メントール、炮附子、柴根、ハッカ油、チモール、
アクリノール、ロートエキス、トウガラシエキスなど)
などの薬効成分および/または賦形剤、粘着性付与成
分、酸化防止剤、香料、着色剤などの成分を混練したも
のをいう。Adhesives are lipophilic adhesives (natural rubber, isoprene rubber, styrene-isoprene-styrene copolymer, styrene-butadiene-styrene copolymer, styrene-butadiene rubber, polyacrylic acid ester, etc.) or hydrophilic adhesives. Corticosteroids, anesthetics, antihistamines, antibacterial agents, antifungal agents, analgesic / antiinflammatory agents, antibiotics, poultices (camphor, menthol, sardine), etc. (carboxyvinyl polymer, polyvinylpyrrolidone, sodium polyacrylate, etc.) , Pine, peppermint oil, thymol,
(Acrinol, funnel extract, capsicum extract, etc.)
And kneading ingredients such as medicinal components and / or excipients, tackifying components, antioxidants, fragrances, and coloring agents.
加水冷却物質とは、水を加えることによって冷却作用
を起す物質であり、皮膚に適用しても支障のないもので
ある。The water-cooling substance is a substance that causes a cooling action by adding water, and is a substance that can be applied to the skin without any trouble.
たとえば、水和した吸熱作用を起す物質(無水塩化カ
ルシウム、無水硫酸ナトリウムなど)、水の存在下で他
の物質と反応して吸熱作用を起すもの(塩化アンモニウ
ムと硝酸ナトリウムの混合物など)などがある。For example, hydrated endothermic substances (anhydrous calcium chloride, anhydrous sodium sulfate, etc.) and substances that react with other substances in the presence of water to cause an endothermic action (such as a mixture of ammonium chloride and sodium nitrate) is there.
加水冷却物質を粘着物質に混練する場合には、親水性
粘着物質を用いる。When the water-cooling substance is kneaded with the adhesive substance, a hydrophilic adhesive substance is used.
本発明の湿布剤は次のようにして製造することができ
る。The poultice of the present invention can be manufactured as follows.
(1)粘着剤に加水冷却剤を混練したもの 所要成分と加水冷却剤を秤取し、常法により親水性粘
着物質と混練して粘着剤を調製し、これを前記水膨潤性
繊維布状体の片側に均一に塗布し、粘着面にセパレータ
ーを貼付する。(1) Adhesive mixed with water-cooling agent The required components and water-cooling agent are weighed and kneaded with a hydrophilic adhesive substance by a conventional method to prepare an adhesive, which is then swelled in the water-swellable fiber cloth. Apply evenly on one side of the body and attach the separator to the adhesive side.
水膨潤性繊維布状体の非粘着面は、水の揮散孔を穿っ
た不通水性フィルムで被覆するか、または被覆すること
なく布状体を露出しておく。The non-adhesive surface of the water-swellable fibrous cloth is covered with a water-impermeable film having water volatilization holes, or the cloth is exposed without being covered.
これを適当なサイズに切断して包装し、製品とする。 This is cut into an appropriate size and packaged to obtain a product.
(2)粘着剤に加水冷却剤を混練しないもの 前記吸水膨潤性繊維布状体の片側に前記加水冷却剤を
均一に存在させる。(2) One in which the water-cooling agent is not kneaded with the pressure-sensitive adhesive The water-cooling agent is uniformly present on one side of the water-swellable fiber cloth.
a) 粘着剤層と吸水膨潤性繊維布状体との間に加水冷
却剤を存在させる場合は、吸水膨潤性繊維布状体の加水
冷却剤存在面を、不通水性フィルムで被覆するか被覆す
ることなく、前記粘着剤で均一に塗布し、その粘着面に
セパレーターを貼付する。a) When a water-cooling agent is present between the pressure-sensitive adhesive layer and the water-swellable fibrous cloth, the water-swellable fiber cloth is coated or covered with a water-impermeable film on the surface of the water-swellable fiber cloth. Without applying the adhesive, the adhesive is applied uniformly, and a separator is attached to the adhesive surface.
その吸水膨潤性繊維布状体の非粘着面は、微細孔を多
数穿った不通水性フィルムで被覆するか、被覆すること
なしに露出しておく。The non-adhesive surface of the water-swellable fibrous cloth is covered with a water-impermeable film having a large number of fine holes, or is left uncovered.
b) 吸水膨潤性繊維布状体の非粘着面に加水冷却剤を
存在させる場合は、吸水膨潤性繊維布状体の加水冷却剤
不存在面を不通水性フィルムで被覆するか被覆すること
なしに前記粘着剤で均一に塗布し、その粘着面にセパレ
ーターを貼付する。b) When a water-cooling agent is present on the non-adhesive surface of the water-swellable fiber cloth, the water-swelling fiber cloth-free surface may or may not be covered with a water-impermeable film. The adhesive is applied uniformly and a separator is attached to the adhesive surface.
その吸水膨潤性繊維布状体の非粘着面は、微細孔を多
数穿った不通水性フィルムまたは前記吸水膨潤性繊維布
状体と同質のもので被覆する。The non-adhesive surface of the water-swellable fiber cloth is covered with a water-impermeable film having a large number of fine pores or the same quality as the water-swellable fiber cloth.
最後にこれを適当なサイズに切断して包装し製品とす
る。Finally, this is cut into an appropriate size and packaged to obtain a product.
(発明の効果) 本発明の湿布剤は、水分を含まないので従来の含水湿
布剤に比して嵩が小さく、保存、運搬、携行に便利であ
るばかりか、長期間保存しても水分の喪失による品質の
劣化を起さない。(Effect of the invention) Since the poultice of the present invention does not contain water, its volume is smaller than that of the conventional hydrous poultice, and it is convenient for storage, transportation, and carrying. Does not cause quality deterioration due to loss.
また乾燥状態で携行し用時水に濡らして患部に適用で
きるので救急医療に利用することができ、患部の部位、
大きさにより適宜のサイズに切断して使用することがで
き経済的である。In addition, it can be used in emergency care as it can be carried in a dry state and soaked in water when used and applied to the affected area.
It is economical because it can be cut into an appropriate size for use.
しかも、従来の含水湿布剤に比して製品中の保水量を
著しく高め得、併せて加水冷却剤が配合してあることに
より、冷却効果を大きく且つ持続させることが可能であ
る。Moreover, the amount of water retention in the product can be significantly increased as compared with the conventional hydrous poultice, and the addition of a water-cooling agent makes it possible to maintain a large cooling effect.
(実施例) 以下、実施例および試験例を挙げて本発明を具体的に
説明する。(Example) Hereinafter, the present invention will be specifically described with reference to Examples and Test Examples.
実施例1 サリチル酸グリコール 1.5 重量部 ハッカ油 1.5 〃 dl−カンフル 0.5 〃 塩酸ジフェンヒドラミン 0.02 〃 カルボキシビニルポリマー 5.0 〃 ポリビニルピロリドン 5.0 〃 プロピレングリコール 5.0 〃 グリセリン 25.0 〃 無水硫酸ナトリウム 30.0 〃 酸化チタン 3.0 〃 ポリアクリル酸ナトリウム 4.0 〃 エチルアルコール 9.43 〃 乾燥水酸化アルミニウム 0.05 〃 カオリン 10.0 〃 計 100.00 〃 前記成分を秤取し、MS式加圧ニーダー〔商品名、森山
製作所(株)製〕を用いて常法により混練し、粘着剤を
得た。Example 1 Glycol salicylate 1.5 parts by weight peppermint oil 1.5 〃 dl-camphor 0.5 〃 diphenhydramine hydrochloride 0.02 〃 carboxyvinyl polymer 5.0 〃 polyvinylpyrrolidone 5.0 〃 propylene glycol 5.0 〃 glycerin 25.0 〃 anhydrous sodium sulfate 30.0 〃 sodium polyacetic acid 3.0 〃 4.0 〃 Ethyl alcohol 9.43 〃 Dry aluminum hydroxide 0.05 〃 Kaolin 10.0 〃 Total 100.00 〃 Weigh the above ingredients and knead them using an MS type pressure kneader (trade name, manufactured by Moriyama Seisakusho Co., Ltd.) by a conventional method. An adhesive was obtained.
ランシールF TF−2〔商品名、日本エクスラン
(株)製〕に直径1mmの孔を多数穿設したポリエチレン
フィルムを貼合わせ、この非貼合わせ面に前記粘着剤を
100g/1000cm2の割合でカレンダー・ロールにより塗布し
た。この粘着面にシリコン処理したポリエステルフィル
ムを貼付し、14cm×10cmのサイズに切断し、6枚ずつ包
装して製品とした。Lanseal F TF-2 [trade name, manufactured by Nippon Exlan Co., Ltd.] is laminated with a polyethylene film having a large number of holes with a diameter of 1 mm, and the non-laminated surface is coated with the adhesive.
It was applied by a calendar roll at a rate of 100 g / 1000 cm 2 . A silicone-treated polyester film was attached to this adhesive surface, cut into a size of 14 cm × 10 cm, and 6 sheets each were packaged to obtain a product.
実施例2 サリチル酸グリゴール 1.5 重量部 ハッカ油 1.5 〃 dl−カンフル 0.5 〃 塩酸ジフェンヒドラミン 0.02 〃 カルボキシビニルポリマー 5.0 〃 ポリビニルピロリドン 5.0 〃 プロピレングリコール 5.0 〃 グリセリン 25.0 〃 酸化チタン 3.0 〃 ポリアクリル酸ナトリウム 4.0 〃 エチルアルコール 9.43 〃 乾燥水酸化アルミニウム 0.05 〃 カオリン 10.0 〃 重炭酸カルシウム 30.0 〃 計 100.00 〃 前記成分を秤取し、実施例1に準じて粘着剤を得た。Example 2 Glygolic salicylate 1.5 parts by weight peppermint oil 1.5 〃 dl-camphor 0.5 〃 diphenhydramine hydrochloride 0.02 〃 carboxyvinyl polymer 5.0 〃 polyvinylpyrrolidone 5.0 〃 propylene glycol 5.0 〃 glycerin 25.0 〃 titanium oxide 3.0 〃 9.43 sodium polyacrylate 4.0 alcohol 〃 Dry aluminum hydroxide 0.05 〃 Kaolin 10.0 〃 Calcium bicarbonate 30.0 〃 Total 100.00 〃 The above ingredients were weighed and an adhesive was obtained according to Example 1.
ランシールF TF−2に直径1mmの孔を多数穿設した
ポリエチレンフィルムを貼合わせ、この非貼合わせ面に
塩化カルシウムを30g/1000cm2の割合で均一に存在させ
た後、この面に前記粘着剤を100g/1000cm2の割合でカレ
ンダー・ロールにより塗布した。A polyethylene film having a large number of holes with a diameter of 1 mm was attached to Lanseal F TF-2, and calcium chloride was uniformly present on this non-attached surface at a rate of 30 g / 1000 cm 2 , and then the adhesive was applied to this surface. Was applied by a calendar roll at a rate of 100 g / 1000 cm 2 .
この粘着面にシリコン処理したポリエステルフィルム
を貼付し、14cm×10cmのサイズに切断し、6枚ずつ包装
して製品とした。A silicone-treated polyester film was attached to this adhesive surface, cut into a size of 14 cm × 10 cm, and 6 sheets each were packaged to obtain a product.
実施例3 スミカゲルF−51〔商品名、住友化学工業(株)製〕
に実施例2で調製した粘着剤を100g/1000cm2の割合でカ
レンダー・ロールにより塗布し、この貼着面にシリコー
ン処理したポリエステルフィルムを貼付した。Example 3 Sumikagel F-51 [trade name, manufactured by Sumitomo Chemical Co., Ltd.]
The pressure-sensitive adhesive prepared in Example 2 was applied at a rate of 100 g / 1000 cm 2 by a calender roll, and a silicone-treated polyester film was attached to the attaching surface.
この調製品の非粘着面に塩化アンモニウムと硝酸ナト
リウムの1:1混合物を30g/1000cm2の割合で均一の存在さ
せた後、この面に同形同大のスミカゲルF−51を常用の
手段で貼合わせ、14cm×10cmのサイズに切断し、6枚ず
つ包装して製品とした。A 1: 1 mixture of ammonium chloride and sodium nitrate was uniformly present on the non-adhesive surface of this preparation at a rate of 30 g / 1000 cm 2 , and then SUMIKAGEL F-51 of the same size and size was applied to this surface by a conventional means. Laminated, cut into a size of 14 cm x 10 cm, and packaged into 6 pieces each to obtain a product.
試験例 (1)実施例1で調製した湿布剤(14cm×10cm,17.2g)
に水を十分に含ませ試料とした。Test Example (1) The poultice prepared in Example 1 (14 cm × 10 cm, 17.2 g)
The sample was made to sufficiently contain water.
試料の重量は131.4gで、その含水率は約87%である。 The weight of the sample is 131.4 g and its water content is about 87%.
試料と同一、同量の薬物を含有し、含水率約50%の従
来タイプの含水湿布剤市販品を試料と同一サイズに切断
しコントロールとした。A conventional commercial hydrous poultice containing the same amount and the same amount of drug as the sample and a water content of about 50% was cut into the same size as the sample to serve as a control.
(2)健康な青年男子6名を一群とし、名人の一方の肩
に試料を、他方の肩にコントロールを貼付し、アンケー
ト方式により、下記の判定基準を用いてその効果の強さ
と持続性を調べ、その結果を平均値で第1表に示す。(2) A group of 6 healthy young men, a sample of which is attached to one shoulder of a virtuoso, and a control of which is attached to the other shoulder, and the strength and duration of its effect are determined by a questionnaire method using the following criteria. The results are shown in Table 1 as an average value.
Claims (1)
繊維からなり、吸水量が30ml/g以上で乾燥状態にある吸
水膨潤性繊維布状体の片側に粘着剤層を設けるととも
に、加水冷却物質を、前記粘着剤層に混練させるか、前
記粘着剤層と前記吸水膨潤性繊維布状体の間に存在させ
るか、または前記吸水膨潤性繊維布状体の非粘着面に存
在させた湿布剤。1. A pressure-sensitive adhesive layer is provided on one side of a water-swellable fibrous cloth, which is made of fibers obtained by binding a hydrophilic cross-linked polymer to synthetic fibers and has a water absorption of 30 ml / g or more and is in a dry state. A water-cooling substance is kneaded into the pressure-sensitive adhesive layer, is present between the pressure-sensitive adhesive layer and the water-swellable fiber cloth, or is present on the non-adhesive surface of the water-swellable fiber cloth. Poultice.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62118400A JP2531179B2 (en) | 1987-05-15 | 1987-05-15 | Poultice |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62118400A JP2531179B2 (en) | 1987-05-15 | 1987-05-15 | Poultice |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63284124A JPS63284124A (en) | 1988-11-21 |
JP2531179B2 true JP2531179B2 (en) | 1996-09-04 |
Family
ID=14735721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62118400A Expired - Lifetime JP2531179B2 (en) | 1987-05-15 | 1987-05-15 | Poultice |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2531179B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007029638A (en) * | 2005-07-29 | 2007-02-08 | Daiya Seiyaku Kk | Cooling sheet and portable cooling sheet |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19624419A1 (en) * | 1996-06-19 | 1998-01-02 | Haarmann & Reimer Gmbh | Desiccant containing fragrance |
AU8787898A (en) * | 1998-10-02 | 2000-04-06 | Cryomed France | Textile articles with a cooling capability |
-
1987
- 1987-05-15 JP JP62118400A patent/JP2531179B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007029638A (en) * | 2005-07-29 | 2007-02-08 | Daiya Seiyaku Kk | Cooling sheet and portable cooling sheet |
Also Published As
Publication number | Publication date |
---|---|
JPS63284124A (en) | 1988-11-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |