JPH03189623A - Sealing medium composition for liquid crystal cell - Google Patents

Sealing medium composition for liquid crystal cell

Info

Publication number
JPH03189623A
JPH03189623A JP32814289A JP32814289A JPH03189623A JP H03189623 A JPH03189623 A JP H03189623A JP 32814289 A JP32814289 A JP 32814289A JP 32814289 A JP32814289 A JP 32814289A JP H03189623 A JPH03189623 A JP H03189623A
Authority
JP
Japan
Prior art keywords
liquid crystal
weight
parts
epoxy resin
pts
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.)
Granted
Application number
JP32814289A
Other languages
Japanese (ja)
Other versions
JP2801708B2 (en
Inventor
Hiroyuki Sawai
沢井 宏之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP1328142A priority Critical patent/JP2801708B2/en
Publication of JPH03189623A publication Critical patent/JPH03189623A/en
Application granted granted Critical
Publication of JP2801708B2 publication Critical patent/JP2801708B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To exhibit an improving effect by adding a polythiol compd., a curing accelerator and an inorg. filler to 100 pts. wt. liquid epoxy resin in which phosphate is incorporated. CONSTITUTION:As the compsn. of the sealing medium, 100 pts. wt. liquid epoxy resin incorporated with the phosphate in the epoxy resin skeleton is prepd. The polythiol compd. is added at 80 to 120 pts. wt., the curing accelerator at 0.1 to 10 pts. wt. and the inorg. filler at 10 to 300 pts. wt. to this resin. The effect the lowering the viscosity of the sealing medium by the heating of a stage for curing the sealing medium is exhibited if sulfuric acid method titanium oxide is used as titanium oxide. The strict control for prebaking prior to pressure curing is not required. In addition, the liquid crystal is completely sealed and various adverse conditions are completely overcome. The good effect is thus obtd.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は液晶表示素子に用いられ結晶セル製造に際して
用いられシール剤組成物に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sealant composition used in liquid crystal display elements and used in the production of crystal cells.

(従来の技術) 従来、液晶表示素子に用いられている液晶セルの透明導
電基板としては、ガラス上に酸化スズや酸化インジウム
等を蒸着やスパッタリングにより形成したものが用いら
れてきた。しかしガラス基板は割れやすいという欠点を
有しているため、薄型化、軽量化、大面積化など近年液
晶表示素子に要求される特徴を十分に満たすことは難し
かった。
(Prior Art) Conventionally, transparent conductive substrates for liquid crystal cells used in liquid crystal display devices have been made by forming tin oxide, indium oxide, or the like on glass by vapor deposition or sputtering. However, since glass substrates have the disadvantage of being easily broken, it has been difficult to fully satisfy the characteristics required of liquid crystal display elements in recent years, such as thinner, lighter weight, and larger area.

そこで、ガラス基板の代わりに透明性を有する高分子フ
ィルム上に透明導電膜を形成したものを液晶表示素子の
基板として採用することが検討されてきている。
Therefore, instead of a glass substrate, consideration has been given to using a transparent conductive film formed on a transparent polymer film as a substrate for a liquid crystal display element.

このような状況においてシール剤組成物に係る要求もガ
ラス基板を用いる場合とは様相を異にしており、具体的
には以下のことが要求されている。
Under such circumstances, the requirements regarding the sealant composition are different from those when using a glass substrate, and specifically, the following are required.

(1)プラスチックフィルム基板、透明導電膜、透明導
電膜の密着性を向上させるために設けられた下地層等と
の密着性に優れていること。
(1) It has excellent adhesion to a plastic film substrate, a transparent conductive film, and a base layer provided to improve the adhesion of the transparent conductive film.

(2)  プラスチックフィルム基板の採用のため、製
造工程、液晶セルの使用環境の変化などから、酸化物層
が適度の可とう性を有すること。
(2) Because a plastic film substrate is used, the oxide layer must have appropriate flexibility due to changes in the manufacturing process and the environment in which the liquid crystal cell is used.

(3)量産化及び作業性の観点から適当な長さのポット
ライフを有し、また低温速硬化可能であること。
(3) It should have an appropriate pot life from the standpoint of mass production and workability, and be capable of rapid curing at low temperatures.

(4)  スクリーン印刷性に優れていること。(4) Excellent screen printing properties.

(5)耐液晶性に優れていること。(5) Excellent liquid crystal resistance.

(6)水蒸気、酸素等が液晶中に侵入することを防止で
きること。
(6) It must be possible to prevent water vapor, oxygen, etc. from entering the liquid crystal.

(7)液晶の作動に関して電流値増大の原因になるイオ
ン性不純物を含まない硬化物層であること。
(7) The cured layer does not contain ionic impurities that cause an increase in current value regarding the operation of the liquid crystal.

(8)  シール剤硬化物層に、にじみ出しや気泡残り
がないこと。
(8) There should be no oozing or residual air bubbles in the cured sealant layer.

これらの要求に対して従来用いられてきたエポキシ〜ポ
リアミン、エポキシ−ポリアミド系のシール剤では満足
な結果は得られていなかった。
To meet these requirements, the epoxy-polyamine and epoxy-polyamide sealants conventionally used have not provided satisfactory results.

(発明が解決しようとする課題) 本願発明者は、これらの諸要求を満足するため、鋭意研
究を行い、ポリチオール−エポキシ系の組成物の優れて
いることを見いだした。しかしながら、シール剤硬化工
程の加熱によるシール剤の粘度低下の結果起こるにじみ
出しや気泡残りのない良好な硬化物層を得るため、加圧
硬化に先立って行われるプリベータを厳密に管理する必
要があるという点で若干難点があるため、鋭意この点に
ついての改良検討を行い、酸化チタンとして硫酸法酸化
チタンを使用すると優れた改良効果があることを見いだ
し、本発明を完成するに至ったものである。
(Problems to be Solved by the Invention) In order to satisfy these various demands, the inventors of the present application conducted extensive research and discovered that polythiol-epoxy compositions are superior. However, in order to obtain a good cured layer without any oozing or bubbles that occur as a result of the viscosity of the sealant decreasing due to heating during the sealant curing process, it is necessary to strictly control the pre-baking process that is performed prior to pressure curing. Since there are some difficulties in this respect, we conducted an earnest study to improve this point and found that using sulfuric acid method titanium oxide as the titanium oxide has an excellent improvement effect, and we have completed the present invention. .

(課題を解決するための手段) 本発明は、液晶セルの製造に用いられるシール剤であっ
て、その組成がエポキシ樹脂骨格中にリン酸エステル基
が含まれている液状エポキシ樹脂100重量部に対して
、ポリチオール系化合物80〜120重量部、硬化促進
剤0.1〜10重量部、無機充填剤10〜300重量部
であることを特徴とする液晶セル用シール剤組成物に関
するものである。
(Means for Solving the Problems) The present invention provides a sealant used for manufacturing liquid crystal cells, the composition of which is 100 parts by weight of a liquid epoxy resin containing a phosphate group in the epoxy resin skeleton. On the other hand, the present invention relates to a sealant composition for a liquid crystal cell characterized by containing 80 to 120 parts by weight of a polythiol compound, 0.1 to 10 parts by weight of a curing accelerator, and 10 to 300 parts by weight of an inorganic filler.

通常の液晶セルにおいて、シール面は、用いる基板ある
いは透明導電膜の密着性を向上するために設けられた層
、及び透明導電膜(以下ITO膜と略記する)であるが
、ITO膜面が親水性表面のため、リン酸エステル基の
ないエポキシ系では密着性とゆう点で若干問題があった
。リン酸エステル基はITO膜との密着性に寄与するた
め、リン酸エステルを含有する液状エポキシ樹脂を使用
することにより、シール層の密着安定性が著しく向上す
る。
In a normal liquid crystal cell, the sealing surface is a layer provided to improve the adhesion of the substrate or transparent conductive film used, and a transparent conductive film (hereinafter abbreviated as ITO film), but the ITO film surface is hydrophilic. Because of its flexible surface, epoxy systems without phosphate ester groups had some problems in terms of adhesion. Since the phosphate ester group contributes to the adhesion with the ITO film, the use of a liquid epoxy resin containing the phosphate ester significantly improves the adhesion stability of the sealing layer.

また本発明においてポリチオール化合物としてはエポキ
シ樹脂との相溶性の良好な2個以上の一3H基を含有す
る化合物はすべて使用可能である。
Further, as the polythiol compound in the present invention, any compound containing two or more 13H groups that has good compatibility with the epoxy resin can be used.

具体的には以下のごとき化合物が単独もしくは併用して
用いられる。即ち2,2゛−ジメチルメルカプトジエチ
ルエーテル、ペンタエリスリトールβ−チオグリコレー
ト、グリセリンβ−チオグルコレート、ソルビトールβ
−チオグリコレート、トリスヒドロキンエチル(βチオ
ゲルコール)イソシアヌレート、トリスヒドロキシエチ
ル(メルカプトプロピル)イソシアヌレート等である。
Specifically, the following compounds are used alone or in combination. Namely, 2,2'-dimethylmercapto diethyl ether, pentaerythritol β-thioglycolate, glycerin β-thioglycolate, sorbitol β
-thioglycolate, trishydroquinethyl (β-thiogelcol) isocyanurate, trishydroxyethyl (mercaptopropyl) isocyanurate, and the like.

リン酸エステルを含有する液状エポキシ樹脂100重量
部に対するポリチオール化合物の添加量は80〜120
重量部(好ましくは90〜110重量部)であり、80
重量部未満では硬化物層の可とう性が低下し、120重
量部以上では耐液晶性が低下する。
The amount of polythiol compound added to 100 parts by weight of liquid epoxy resin containing phosphoric acid ester is 80 to 120 parts by weight.
parts by weight (preferably 90 to 110 parts by weight), and 80 parts by weight.
If it is less than 120 parts by weight, the flexibility of the cured material layer will decrease, and if it is 120 parts by weight or more, liquid crystal resistance will decrease.

次に本発明で用いられる硬化促進剤は酸無水物系エポキ
シ樹脂の硬化に際して用いられる促進剤はすべて使用で
きるが、2.4.6  トリ(ジメチルアミノメチル)
フェノールと分子内にエチレン性2重結合を有し且つ−
COOH基を有している化合物との塩が好ましい、シー
ル剤のポットライフと速硬化性は相反する特性であるが
、2,4.6 1−リ(ジメチルアミノメチル)フェノ
ールと分子内にエチレン性2重結合を有し且つ−COO
H基を有している化合物との塩を使用することにより、
適当な長さのポットライフを保持しつつ、低温速硬化性
も実現できる。リン酸エステルを含有する液状エポキシ
樹脂100重量部に対する硬化促進剤の添加量は0.1
〜10重量部(好ましくは0.3〜5重量部)であり、
0.1重量部未満では速硬化性が著しく低下し、10重
量部以上では適当なポットライフが得られない。
Next, as the curing accelerator used in the present invention, any accelerator used for curing acid anhydride epoxy resins can be used, but 2.4.6 Tri(dimethylaminomethyl)
It has an ethylenic double bond in the molecule and -
A salt with a compound having a COOH group is preferable.The pot life and fast curing properties of the sealant have contradictory properties, but 2,4.6 1-ly(dimethylaminomethyl)phenol and ethylene in the molecule has a double bond and -COO
By using a salt with a compound having an H group,
It is possible to achieve low-temperature, rapid curing while maintaining an appropriate length of pot life. The amount of curing accelerator added to 100 parts by weight of liquid epoxy resin containing phosphoric acid ester is 0.1
~10 parts by weight (preferably 0.3 to 5 parts by weight),
If it is less than 0.1 parts by weight, the rapid curing properties will be significantly reduced, and if it is more than 10 parts by weight, an appropriate pot life will not be obtained.

また印刷性、印刷時のにじみ防止とゆう観点から無機充
填剤の配合は不可欠であり、特に酸化チタン及びシリカ
が好ましい。酸化チタンとして、硫酸法酸化チタンを用
いると加圧硬化に先立って行われるプリベーク工程を厳
密に管理することなく、容易にシャープな直線性を有す
るにじみ出しや気泡残りのない良好な硬化物層を得るこ
とができる。リン酸エステルを含有する液状エポキシ樹
脂100重量部に対する無機充填剤の添加量は10〜3
00重量部(好ましくは50〜200重量部)であり、
10重量部未満ではスクリーン印刷性が著しく低下し、
300重量部以上では接着性が著しく低下する。
Further, from the viewpoint of printability and prevention of bleeding during printing, it is essential to incorporate an inorganic filler, and titanium oxide and silica are particularly preferred. When using sulfuric acid method titanium oxide as titanium oxide, it is possible to easily create a good cured product layer with sharp linearity and no oozing or bubbles, without having to strictly control the pre-bake process that is performed prior to pressure curing. Obtainable. The amount of inorganic filler added to 100 parts by weight of liquid epoxy resin containing phosphoric acid ester is 10 to 3
00 parts by weight (preferably 50 to 200 parts by weight),
If it is less than 10 parts by weight, screen printability will be significantly reduced,
If the amount exceeds 300 parts by weight, the adhesiveness will be significantly reduced.

(実施例) 溶融押し出し法により製膜したポリエーテルスルホン(
以下PESと略記する)フィルムにアンダーコート処理
を施し、高周波マグネトロンスパッタリング装置を用い
て約300オングストロームの厚さにITO膜を形成し
、透明導電基板を作成した。該透明導電膜を6N−HC
Iでエツチングし、ITO膜のパターニングを行った0
次に、イミド系樹脂により配向膜を形成し、ラビング法
により配向処理を行った。
(Example) Polyether sulfone (
The film (hereinafter abbreviated as PES) was subjected to an undercoat treatment, and an ITO film with a thickness of about 300 angstroms was formed using a high-frequency magnetron sputtering device to create a transparent conductive substrate. The transparent conductive film was coated with 6N-HC.
The ITO film was patterned by etching with I
Next, an alignment film was formed using an imide resin, and alignment treatment was performed using a rubbing method.

一方、以下の配合にしたがい、シール剤の主剤及び硬化
剤を3本インクロールを用い混練して得た。
On the other hand, a sealant main ingredient and a curing agent were kneaded using three ink rolls according to the following formulation.

(実施例1) 主剤(1)配合組成 硬化剤(1)配合組成 (実施例2) 実施例1において、硬化剤(1)配合組成中のポリチオ
ール化合物を2.2゛−ジメチルメルカプトジエチルエ
ーテルからトリスヒドロキシエチルイソシアヌレートβ
マーキ+ブトプロピオネートに変更した硬化剤(2)を
作成した。
(Example 1) Base agent (1) Compound composition Curing agent (1) Compound composition (Example 2) In Example 1, the polythiol compound in the curing agent (1) compound was changed from 2.2'-dimethylmercapto diethyl ether. Trishydroxyethyl isocyanurate β
A curing agent (2) was prepared in which the curing agent was changed to marqui+butopropionate.

(比較例1) 実施例1において、硫酸法酸化チタンを塩素性酸化チタ
ンに変更した主剤(2)及び硬化剤(3)を作成した。
(Comparative Example 1) In Example 1, a base material (2) and a curing agent (3) were prepared by changing the sulfuric acid method titanium oxide to chlorinated titanium oxide.

上記、主剤(1)〜(2)及び硬化剤(1)〜(3)を
100:90の割合で配合しスクリーン印刷により、印
刷幅0.5mm、印刷厚み20μmになるように、上部
フィルム基板に塗布した。これを、90℃、10〜20
分プリベークし、10μm径のギャップ剤(ポリマービ
ーズ)を散布した下部基板と重ね合わせ0.5g/dで
押圧して150℃、3時間加圧硬化して得たセルのシー
ル仕上がりについて表1に示す。
The above-mentioned main ingredients (1) to (2) and curing agents (1) to (3) are mixed in a ratio of 100:90, and screen printing is performed on the upper film substrate so that the printing width is 0.5 mm and the printing thickness is 20 μm. It was applied to. This was heated to 90℃ for 10 to 20 minutes.
Table 1 shows the seal finish of the cell obtained by pre-baking for 30 minutes, stacking it with the lower substrate on which gap agent (polymer beads) with a diameter of 10 μm was sprinkled, pressing it at 0.5 g/d, and curing under pressure at 150°C for 3 hours. show.

表 1 表示体として有用な液晶セルであった。table 1 It was a liquid crystal cell useful as a display.

(発明の効果) 得られたシール剤組成物は、加圧硬化に先立って行われ
るブリベーク工程を厳密に管理することなく、前記諸用
件を完全にクリヤーする優れた硬化シール層を形成する
ことができ好ましい。
(Effect of the invention) The obtained sealant composition forms an excellent cured sealing layer that completely satisfies the above requirements without strictly controlling the pre-baking process that is performed prior to pressure curing. This is preferable.

Claims (3)

【特許請求の範囲】[Claims] (1)液晶セルの製造に用いられるシール剤であって、
その組成がエポキシ樹脂骨格中にリン酸エステル基が含
まれている液状エポキシ樹脂100重量部に対して、ポ
リチオール系化合物80〜120重量部、硬化促進剤0
.1〜10重量部、無機充填剤10〜300重量部であ
ることを特徴とする液晶セル用シール剤組成物。
(1) A sealant used in manufacturing liquid crystal cells,
Its composition is 100 parts by weight of a liquid epoxy resin containing phosphoric acid ester groups in the epoxy resin skeleton, 80 to 120 parts by weight of a polythiol compound, and 0 parts by weight of a curing accelerator.
.. 1. A sealing agent composition for a liquid crystal cell, comprising 1 to 10 parts by weight of an inorganic filler and 10 to 300 parts by weight of an inorganic filler.
(2)硬化促進剤が2,4,6トリ(ジメチルアミノメ
チル)フェノールと分子内にエチレン性2重結合を有し
且つ−COOH基を有している化合物との塩である特許
請求の範囲第1項記載の液晶セル用シール剤組成物。
(2) Claims in which the curing accelerator is a salt of 2,4,6 tri(dimethylaminomethyl)phenol and a compound having an ethylenic double bond and a -COOH group in the molecule. 2. The sealant composition for liquid crystal cells according to item 1.
(3)無機充填剤が酸化チタン及びシリカからなり、酸
化チタンが硫酸法酸化チタンである特許請求の範囲第1
項記載の液晶セル用シール剤組成物。
(3) Claim 1, in which the inorganic filler is made of titanium oxide and silica, and the titanium oxide is titanium oxide processed using sulfuric acid.
A sealing agent composition for liquid crystal cells as described in 2.
JP1328142A 1989-12-20 1989-12-20 Liquid crystal cell sealant composition Expired - Lifetime JP2801708B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1328142A JP2801708B2 (en) 1989-12-20 1989-12-20 Liquid crystal cell sealant composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1328142A JP2801708B2 (en) 1989-12-20 1989-12-20 Liquid crystal cell sealant composition

Publications (2)

Publication Number Publication Date
JPH03189623A true JPH03189623A (en) 1991-08-19
JP2801708B2 JP2801708B2 (en) 1998-09-21

Family

ID=18206967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1328142A Expired - Lifetime JP2801708B2 (en) 1989-12-20 1989-12-20 Liquid crystal cell sealant composition

Country Status (1)

Country Link
JP (1) JP2801708B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999040142A1 (en) * 1998-02-04 1999-08-12 Lord Corporation Thiol-cured epoxy composition
EP1666526A1 (en) * 2003-07-24 2006-06-07 Nitto Denko Corporation Inorganic powder-containing resin composition, film-forming material layer, transfer sheet, method for producing substrate with dielectric layer, and substrate with dielectric layer
US8048482B2 (en) 2003-08-14 2011-11-01 Akzo Nobel Coatings International B.V. Paint comprising a liquid phase and an active powder phase

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61138232A (en) * 1984-12-10 1986-06-25 Sumitomo Bakelite Co Ltd Liquid crystal cell having flexibility
JPS62133425A (en) * 1985-12-06 1987-06-16 Sumitomo Bakelite Co Ltd Composition of sealing material for liquid crystal cell
JPS6310131A (en) * 1986-07-02 1988-01-16 Sumitomo Bakelite Co Ltd Sealing composition for liquid crystal cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61138232A (en) * 1984-12-10 1986-06-25 Sumitomo Bakelite Co Ltd Liquid crystal cell having flexibility
JPS62133425A (en) * 1985-12-06 1987-06-16 Sumitomo Bakelite Co Ltd Composition of sealing material for liquid crystal cell
JPS6310131A (en) * 1986-07-02 1988-01-16 Sumitomo Bakelite Co Ltd Sealing composition for liquid crystal cell

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999040142A1 (en) * 1998-02-04 1999-08-12 Lord Corporation Thiol-cured epoxy composition
US6153719A (en) * 1998-02-04 2000-11-28 Lord Corporation Thiol-cured epoxy composition
EP1666526A1 (en) * 2003-07-24 2006-06-07 Nitto Denko Corporation Inorganic powder-containing resin composition, film-forming material layer, transfer sheet, method for producing substrate with dielectric layer, and substrate with dielectric layer
EP1666526A4 (en) * 2003-07-24 2006-12-06 Nitto Denko Corp Inorganic powder-containing resin composition, film-forming material layer, transfer sheet, method for producing substrate with dielectric layer, and substrate with dielectric layer
US7585907B2 (en) 2003-07-24 2009-09-08 Nitto Denko Corporation Inorganic powder-containing resin composition, a film-forming material layer, a transfer sheet, method of producing a substrate having a dielectric layer formed thereon, and a substrate having a dielectric layer formed thereon
US8048482B2 (en) 2003-08-14 2011-11-01 Akzo Nobel Coatings International B.V. Paint comprising a liquid phase and an active powder phase

Also Published As

Publication number Publication date
JP2801708B2 (en) 1998-09-21

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