JP3710403B2 - Frozen tofu-style konjac food manufacturing method - Google Patents

Frozen tofu-style konjac food manufacturing method Download PDF

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Publication number
JP3710403B2
JP3710403B2 JP2001274468A JP2001274468A JP3710403B2 JP 3710403 B2 JP3710403 B2 JP 3710403B2 JP 2001274468 A JP2001274468 A JP 2001274468A JP 2001274468 A JP2001274468 A JP 2001274468A JP 3710403 B2 JP3710403 B2 JP 3710403B2
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Prior art keywords
konjac
style
water
fatty acid
frozen tofu
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JP2003079326A (en
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伴平 目崎
直基 坂元
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Mitsubishi Chemical Corp
Mitsubishi Chemical Foods Corp
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Mitsubishi Chemical Corp
Mitsubishi Chemical Foods Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、凍豆腐風こんにゃく食品の製造方法に関する。本発明の方法によれば、軟らかな舌ざわりで、適度な歯切れとジューシーな食感を有する、凍豆腐風こんにゃく食品を得ることが出来る。
【0002】
【従来の技術】
食用こんにゃくは、さといも科の植物である「Amorphopallus konjac K.Koch」の球茎(こんにゃく芋またはこんにゃく玉と呼ばれる)から製造されるゲル食品であり、その風味と独特なテクスチャーから、日本の伝統食品として広く食されている。伝統的なこんにゃくは、こんにゃく芋から作られ、自然のこんにゃく色を呈し、味のしみ込みや風味がよく、生芋こんにゃくとして賞味されていた。
【0003】
ところが、近年では、生芋の保存性の問題から、殆どの製品は、こんにゃく芋を乾燥して微粉末にしたこんにゃく製粉から製造されている。通常、その製造は次の様に行われる。すなわち、先ず、水または温水に、こんにゃく製粉を加えて攪拌する。これにより、主成分のマンナンが水を吸収して膨潤したこんにゃく糊となる。次いで、これに石灰乳などのこんにゃく用凝固剤を添加し、加熱凝固して成型物とする。
【0004】
しかしながら、上記の様にして得られる食用こんにゃくは、板こんにゃく、玉こんにゃく、糸こんにゃく、粒こんにゃく等、外観的形状は種々異なるものの、味覚が単調である。また、製粉の使用により生芋こんにゃくより味のしみ込みが劣る。そこで、様々な食味のこんにゃくの製造法が提案されている。例えば、豆腐を凍らせ、更に乾燥させて作られる凍豆腐(高野豆腐)は、いったん水に戻して煮物に使用され、煮汁をたっぶりと含んだ軟らかな舌ざわりが好まれている。
【0005】
凍豆腐と同様に、凍らせたこんにゃくを解凍して煮汁で煮込んで食する新規なこんにゃくの製造方法として、こんにゃく糊に、水に分散させた澱粉および凝固剤を混合し、この混合物を成形容器に入れ、加熱してゲル化させた後、凍結する方法(特開平5−192106号公報)が知られている。一般には、雪花菜などを配合して凍豆腐風のこんにゃくを製造することが行われるが、黄色味が出る欠点があり、また、大豆蛋白は人によりアレルギーを引き起こすことがある。
【0006】
【発明が解決しようとする課題】
本発明は、上記実情に鑑みなされたものであり、その目的は、植物蛋白を配合することなく、適度な歯切れとジューシーな食感を有する、凍豆腐風こんにゃく食品の、簡易かつ安定的な製造方法を提供することにある。
【0007】
【課題を解決するための手段】
すなわち、本発明の要旨は、ショ糖脂肪酸エステルを含有する水に、こんにゃく製粉を添加して膨潤させた後、凝固剤を加えて凝固させる凍豆腐風こんにゃく食品の製造方法であって、ョ糖脂肪酸エステルの量が、こんにゃく製粉および水の全量に対し、0.2〜1.0重量%であることを特徴とする凍豆腐風こんにゃく食品の製造方法に存する。
【0008】
【発明の実施の態様】
以下、本発明を詳細に説明する。本発明で使用するこんにゃく製粉としては、こんにゃく芋、こんにゃく芋の乾燥・粉砕品、その精製品などが挙げられる。
【0009】
本発明で使用するショ糖脂肪酸エステルとしては、炭素数が通常8〜22、好ましくは12〜18の脂肪酸のショ糖エステルを挙げることが出来る。好ましい構成脂肪酸としては、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸などの飽和脂肪酸が挙げられるが、食感・テクスチャーの点から、ラウリン酸が特に好ましい。ショ糖脂肪酸エステルのHLBは、特に問わないが、10以上であることが好ましく、HLBが10未満の場合は水への溶解性が低くなり均一な溶液となり難い。
【0010】
本発明で使用する凝固剤としては、例えば、クエン酸ナトリウム等の有機酸塩、ポリリン酸ナトリウム等のリン酸塩、炭酸ナトリウム、炭酸水素ナトリウム等の炭酸塩、水酸化ナトリウム、水酸化カリウム等の塩基性の食品用塩類が使用できるが、通常、水酸化カルシウムや石灰(酸化カルシウム)を1〜3重量%含む乳濁液が使用される。
【0011】
先ず、本発明では、ショ糖脂肪酸エステルを含有する水に、こんにゃく製粉を添加して膨潤させる。具体的には、通常、60〜80℃の温水にショ糖脂肪酸エステル添加して溶解する。そして、ショ糖脂肪酸エステルを含有する温水中に、こんにゃく製粉を添加する。こんにゃく製粉の添加は、塊が出来ない様に、攪拌しながら行ない、粘度が出て水と分離しなくなったところで攪拌を止め、静置して膨潤させてこんにゃく糊とする。
【0012】
ショ糖脂肪酸エステルの量は、こんにゃく製粉および水の全量に対し、0.2〜1.0重量%、好ましくは0.3〜0.5重量%である。少なすぎると凍豆腐の食感が得られず、多すぎると弾力性が強過ぎて噛み切り難くなる。こんにゃく製粉の添加量は、こんにゃく製粉および水の全量に対し、通常1〜10重量%、好ましくは2〜5重量%である。静置時間は、水に対するこんにゃく製粉の量によって適宜選ばれるが、通常1〜3時間程度である。
【0013】
次いで、こんにゃく糊に凝固剤を加えて凝固させる。凝固剤は素早く添加し全体に均一に混ぜてゲル化させる。凝固剤の量は、こんにゃく製粉および水の全重量に対し、通常0.05〜0.3重量%、好ましくは0.1〜0.2重量%である。凝固剤添加後、2〜3分間ほど混練し、型詰して凝固させることにより形成したこんにゃく成型物が得られる。
【0014】
得られたこんにゃく成型物は、型詰のまま又は型から抜き出し、沸騰した湯で茹でて芯まで火を通し、加熱殺菌と余分な石灰(アク)抜き後に、水にさらして製品とする。得られるこんにゃく食品は、凍豆腐風のジューシーな食感を有するため、そのまま又は煮汁を煮込んで食することも出来る。本発明の凍豆腐風こんにゃく食品は、起泡を含み白色である。煮込んだおでん種として店頭で販売するなど長時間煮込む場合には、加温により、こんにゃくが浮上して表面が乾燥し上部にザラツキが発生するため、こんにゃくの比重を調整して全体が煮汁中に浸る様にすることが好ましい。
【0015】
本発明の凍豆腐風こんにゃく食品全体が煮汁中に浸る様にする方法としては、例えば、ショ糖脂肪酸エステルと糖類を含有する水に、こんにゃく製粉を添加して膨潤させる方法が好ましい。糖類としては、甘味度の小さい糖類としては例えば直鎖オリゴ糖(オリゴトース)等が使用される。糖類の使用量は、こんにゃく製粉および水の全量に対し、通常0.5〜3重量%、好ましくは0.5〜1重量%である。糖類の添加量が多すぎると褐色に着色する。この様にして得られたこんにゃくは、例えば、85℃で5時間煮込んでも表面が乾燥せず、また、中心部分も硬くなり難くなるため、店頭で煮込み販売するのに好適である。
【0016】
【実施例】
以下、本発明を実施例により更に詳細に説明するが、本発明は、その要旨を超えない限り、以下の実施例に限定されるものではない。なお、以下の諸例では次の乳化剤製剤を使用した。
【0017】
<使用した乳化剤>
(1)三菱化学フーズ社製「リョートーシュガーエステルLWA−1570」(ショ糖ラウリン酸エステル40重量%及びエタノール5重量%含有水ペースト品)
(2)三菱化学フーズ社製「リョートーポリグリエステルSWA−10D」(ポリグリセリンステアリン酸エステル40重量%及びエタノール5重量%含有水ペースト品)
【0018】
実施例1〜2
表1に示す所定量(固形分換算)のショ糖脂肪酸エステルを溶解した70℃の温水450gに、こんにゃく製粉15gを攪拌下に少量ずつ添加し、粘りが出て水と分離しなくなったら攪拌を止めて1時間半ほど静置してこんにゃく糊を調製した。十分に膨潤したこんにゃく糊を攪拌しながら50mlの石灰乳(石灰0.65gと発酵調味料(三菱化学フーズ社製「ゆうしん」:石灰臭除去の目的で添加)2.5g含有)を一気に加え、素早く攪拌して石灰を全体に均一に混合させた。これをステンレス容器に流し込み、20分間静置した後、容器ごと熱湯中に入れ、中火で30分間煮沸した後、中心部が冷えるまで水にさらし、型から抜いてこんにゃく成型物を得た。得られたこんにゃく成型物を厚さ10mm程度に切り、これを試食して食感・テクスチャーの官能評価を行った。結果を表1に示す。
【0019】
比較例1〜2
実施例1において、ショ糖脂肪酸エステルを添加しなかった(比較例1)、または、ショ糖脂肪酸エステルに代えてポリグリセリン脂肪酸エステルを使用した(比較例2)他は、実施例1と同様にしてこんにゃく成型物を得、食感・テクスチャーの官能評価を行った。結果を表1に示す。
【0020】
【表1】

Figure 0003710403
【0021】
【発明の効果】
本発明により、軟らかな舌ざわりで、適度な歯切れとジューシーな食感を有する、凍豆腐風こんにゃく食品を簡易に得ることが出来る。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing frozen tofu-style konjac food. According to the method of the present invention, it is possible to obtain a frozen tofu-style konjac food that has a soft texture and a moderate crispness and a juicy texture.
[0002]
[Prior art]
Edible konjac is a gel food made from the stems of the potato family "Amorphopallus konjac K. Koch" (called konjac konjac or konjac balls). From its flavor and unique texture, it is a traditional Japanese food. Widely eaten. Traditional konjac was made from konjac koji, had a natural konjac color, had a good taste and taste, and was tasted as ginger konjac.
[0003]
However, in recent years, because of the problem of storage stability of ginger, most products are manufactured from konjac milling made from dried konjac rice cake. Usually, the production is performed as follows. That is, first, konjac flour is added to water or warm water and stirred. Thereby, the main component mannan absorbs water and becomes a konjac paste swollen. Next, a konjac coagulant such as lime milk is added thereto, and the mixture is heated and coagulated to obtain a molded product.
[0004]
However, the edible konjac obtained as described above has a monotonous taste, although it has various appearance shapes such as plate konjac, ball konjac, yarn konjac, and grain konjac. In addition, the use of milling is inferior to the taste of ginger konjac. Therefore, methods for producing konjac with various tastes have been proposed. For example, frozen tofu (Takano tofu) made by freezing and drying tofu is used once in water and used for boiled food, and a soft texture that includes a lot of broth is preferred.
[0005]
As with frozen tofu, as a new konjac manufacturing method that thaws frozen konjac and simmers in boiled juice, konjac paste is mixed with starch and coagulant dispersed in water, and this mixture is put into a molded container. There is known a method (Japanese Patent Laid-Open No. 5-192106) in which a gel is formed by heating and freezing. In general, frozen tofu-style konjac is produced by blending snow flower vegetables and the like, but there is a disadvantage that yellowish color is produced, and soy protein may cause allergies by humans.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and its purpose is to provide a simple and stable method for producing a frozen tofu-style konjac food having an appropriate crispness and a juicy texture without blending plant proteins. Is to provide.
[0007]
[Means for Solving the Problems]
That is, the gist of the present invention is a method for producing a frozen tofu-style konjac food that is swelled by adding konjac flour to water containing a sucrose fatty acid ester, and then coagulating with a coagulant. The amount of ester is 0.2 to 1.0% by weight based on the total amount of konjac flour and water, and the method for producing a frozen tofu-style konjac food.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail. Examples of the konjac flour used in the present invention include konjac koji, dried and pulverized konjac koji, and purified products thereof.
[0009]
Examples of the sucrose fatty acid ester used in the present invention include sucrose esters of fatty acids having a carbon number of usually 8 to 22, preferably 12 to 18. Preferred constituent fatty acids include saturated fatty acids such as lauric acid, myristic acid, palmitic acid and stearic acid. Lauric acid is particularly preferred from the viewpoint of texture and texture. The HLB of the sucrose fatty acid ester is not particularly limited, but is preferably 10 or more. When the HLB is less than 10, the solubility in water is low and it is difficult to form a uniform solution.
[0010]
Examples of the coagulant used in the present invention include organic acid salts such as sodium citrate, phosphates such as sodium polyphosphate, carbonates such as sodium carbonate and sodium hydrogen carbonate, sodium hydroxide and potassium hydroxide. Although basic food-grade salts can be used, an emulsion containing 1 to 3% by weight of calcium hydroxide or lime (calcium oxide) is usually used.
[0011]
First, in the present invention, konjac flour is added to water containing sucrose fatty acid ester to swell. Specifically, the sucrose fatty acid ester is usually added and dissolved in warm water of 60 to 80 ° C. Then, konjac flour is added to warm water containing sucrose fatty acid ester. Add konjac milling while stirring so that no lumps are formed. Stop stirring when the viscosity is so high that it can no longer separate from water, and leave it to swell to give konjac paste.
[0012]
The amount of sucrose fatty acid ester is 0. 0 relative to the total amount of konjac flour and water. It is 2 to 1.0% by weight, preferably 0.3 to 0.5% by weight. If the amount is too small, the texture of frozen tofu cannot be obtained. If the amount is too large, the elasticity is too strong and it becomes difficult to bite. The amount of konjac flour added is usually 1 to 10% by weight, preferably 2 to 5% by weight, based on the total amount of konjac flour and water. The standing time is appropriately selected depending on the amount of konjac milling with respect to water, but is usually about 1 to 3 hours.
[0013]
Next, a coagulant is added to the konjac paste and solidified. The coagulant is quickly added and mixed uniformly throughout the gel. The amount of the coagulant is usually 0.05 to 0.3% by weight, preferably 0.1 to 0.2% by weight, based on the total weight of konjac flour and water. After adding the coagulant, a konjac molded product formed by kneading for about 2 to 3 minutes, filling the mold and solidifying is obtained.
[0014]
The obtained konjac molded product is either as-packed or extracted from the mold, boiled with boiling water, and heated to the core. After heat sterilization and removal of excess lime, it is exposed to water to obtain a product. The obtained konjac food has a juicy texture of frozen tofu, and can be eaten as it is or by boiling the broth. The frozen tofu-style konjac food of the present invention contains foam and is white. If you boil it for a long time, such as selling it as a stewed oden seed, the konnyaku will rise and dry the surface due to heating, and the surface will become rough, so adjust the specific gravity of the konnyaku and the whole will be in the broth It is preferable to immerse.
[0015]
As a method of immersing the whole frozen tofu-style konjac food of the present invention in the broth, for example, a method of adding konjac flour to water containing sucrose fatty acid ester and saccharides to swell is preferable. As the saccharide, for example, a linear oligosaccharide (oligotose) or the like is used as a saccharide having a low sweetness. The amount of sugar used is usually 0.5 to 3% by weight, preferably 0.5 to 1% by weight, based on the total amount of konjac flour and water. If too much sugar is added, it will turn brown. The konjac obtained in this way is suitable for boiled and sold in stores because, for example, the surface does not dry even when it is boiled at 85 ° C. for 5 hours, and the central part is hard to harden.
[0016]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the summary is exceeded. In the following examples, the following emulsifier formulations were used.
[0017]
<Emulsifier used>
(1) "Ryoto Sugar Ester LWA-1570" manufactured by Mitsubishi Chemical Foods Corporation (water paste product containing 40% by weight of sucrose laurate and 5% by weight of ethanol)
(2) “Ryoto-polyglycerester SWA-10D” manufactured by Mitsubishi Chemical Foods Corporation (water paste product containing 40% by weight of polyglycerol stearate and 5% by weight of ethanol)
[0018]
Examples 1-2
To 450 g of hot water at 70 ° C. in which a predetermined amount (converted to solid content) of sucrose fatty acid shown in Table 1 is dissolved, 15 g of konjac flour is added little by little with stirring. After stopping, it was allowed to stand for about 1 and a half hours to prepare konjac paste. While stirring fully swollen konjac paste, 50 ml of lime milk (0.65 g of lime and 2.5 g of fermented seasoning ("Yushin" manufactured by Mitsubishi Chemical Foods, Inc .: added for the purpose of removing lime odor)) was added all at once. The lime was mixed evenly by stirring rapidly. This was poured into a stainless steel container and allowed to stand for 20 minutes. Then, the whole container was placed in hot water, boiled for 30 minutes on medium heat, then exposed to water until the center cooled down, and removed from the mold to obtain a konjac molded product. The obtained konjac molded product was cut into a thickness of about 10 mm, and this was sampled for sensory evaluation of texture and texture. The results are shown in Table 1.
[0019]
Comparative Examples 1-2
In Example 1, the sucrose fatty acid ester was not added (Comparative Example 1), or a polyglycerin fatty acid ester was used instead of the sucrose fatty acid ester (Comparative Example 2). A konnyaku molded product was obtained and the sensory evaluation of texture and texture was performed. The results are shown in Table 1.
[0020]
[Table 1]
Figure 0003710403
[0021]
【The invention's effect】
According to the present invention, it is possible to easily obtain a frozen tofu-style konjac food having a soft texture and an appropriate crispness and a juicy texture.

Claims (3)

ショ糖脂肪酸エステルを含有する水に、こんにゃく製粉を添加して膨潤させた後、凝固剤を加えて凝固させる凍豆腐風こんにゃく食品の製造方法であって、ショ糖脂肪酸エステルの量が、こんにゃく製粉および水の全量に対し、0.2〜1.0重量%であることを特徴とする凍豆腐風こんにゃく食品の製造方法。A method for producing frozen tofu-style konjac food that is swelled by adding konjac flour to water containing sucrose fatty acid ester, and then coagulating with a coagulant, wherein the amount of sucrose fatty acid ester is A method for producing frozen tofu-style konjac food, characterized in that the content is 0.2 to 1.0% by weight based on the total amount of water . ショ糖脂肪酸エステルがショ糖ラウリン酸エステルである請求項1に記載の方法。  The method according to claim 1, wherein the sucrose fatty acid ester is sucrose laurate. ショ糖脂肪酸エステルと糖類を含有する水に、こんにゃく製粉を添加して膨潤させる請求項1又は2に記載の方法。The method according to claim 1 or 2 , wherein konjac milling is added to water containing sucrose fatty acid ester and saccharide to swell.
JP2001274468A 2001-09-11 2001-09-11 Frozen tofu-style konjac food manufacturing method Expired - Fee Related JP3710403B2 (en)

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