EP0036475A1 - Imprégnant destiné à stabiliser le poil d'un textile; procédé de préparation et textile traité avec ladite composition - Google Patents
Imprégnant destiné à stabiliser le poil d'un textile; procédé de préparation et textile traité avec ladite composition Download PDFInfo
- Publication number
- EP0036475A1 EP0036475A1 EP81100613A EP81100613A EP0036475A1 EP 0036475 A1 EP0036475 A1 EP 0036475A1 EP 81100613 A EP81100613 A EP 81100613A EP 81100613 A EP81100613 A EP 81100613A EP 0036475 A1 EP0036475 A1 EP 0036475A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- textile
- pile
- units
- carbon atoms
- silanes
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23907—Pile or nap type surface or component
- Y10T428/23986—With coating, impregnation, or bond
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2962—Silane, silicone or siloxane in coating
Definitions
- the present invention relates to a pile stabilizing textile impregnating agent and a method for its production.
- Carpets loaded in this way have pressure points, grooves and an uneven pile (so-called walking streets).
- Furniture upholstery fabrics undergo similar changes in their surface properties, preferably in the most accessible and most heavily used areas. The result is a non-uniform appearance of the textile surface.
- silsesquioxane suspensions described there are relatively unstable and are in no way suitable for pole stabilizing equipment.
- this object is achieved in that aqueous methylsilsesquioxane dispersions are used in combination with colloidal silica to finish the textiles.
- the present invention therefore relates to a pile-stabilizing textile impregnating agent containing colloidal suspensions of organosilsesquioxanes and of silica with SiO 2 units.
- the invention further relates to a process for the preparation of such stable, aqueous methylsilsesquioxane / silica dispersions. It is characterized in that silanes of the general formula R-Si (OR ⁇ ) 3 , together with silanes Si (OR ') 4 in which R is a substituted or unsubstituted hydrocarbon radical having 1 to 7 carbon atoms, the substituents of which are halogen atoms, amino, mercapto and can be epoxy groups and up to 95% of the radicals R are methyl and R 'is an alkyl radical having 1 to 4 carbon atoms to a mixture of water, a buffer substance, a surface-active agent and optionally an organic solvent under agitation and under acidic or basic conditions be added.
- silane To achieve a very narrow particle size distribution and a small average particle size of approximately 200 to 500 angstroms, a uniform and slow addition of the amount of silane is required.
- the the exact amount of silane that can be added depends on the substituent R and whether an anionic or cationic surfactant is used.
- the simultaneous hydrolysis of the silanes results in copolymers of the silsesquioxanes in which the units can be present in block form or in a random distribution.
- the preferred amount of added silane of the general formula Si (OR ') 4 is 2 to 50 percent, based on the total amount of silanes used, preferably 3 to 20 percent (% by weight).
- the agent according to the invention is composed approximately as follows: oresiaetwa 2 to 9 wt .-% S ilsesquioxane and 0.1 - 0.4 wt .-% SiO 2 units.
- the surface-active agents mentioned have the function of stabilizing the particles formed in the colloidal suspensions.
- silanes are preferably used: methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, 2-ethylethoxysilane, 2-ethylbutyltranexiloxysilane, 2-ethylbutyltranexiloxane
- Suitable anionic surface-active agents are aliphatic and / or aromatic sulfonic acids, for example decyl, dodecyl, cetyl, stearyl, myristyl or oleyl sulfonic acids or their alkali metal salts. If cationic surfactants are used, it is advantageous to use halides and especially chlorides and bromides. Other surfactants, including those of a nonionic and amphoteric nature, can be used in conjunction with the above agents provided they do not interfere with the stability of the colloidal suspension due to their nature or amount.
- the surfactants are used in an amount of about 0.01 to about 15%, based on the amount of silane used.
- the process for the preparation of the colloidal suspensions according to the invention can be carried out at temperatures between room temperature and 80 ° C .; the temperature range between 50 and 70 ° C. is particularly preferred.
- the buffer substances such as Sodium tetraborate, ammonium bicarbonate, sodium bicarbonate, potassium bicarbonate are used in amounts of 0.05 to 4% by weight based on the total mixture.
- the finish is effective on all pile and pile goods made of synthetic, organic and inorganic fibers and natural fibers.
- finishing products can be applied either before, during or after the dyeing of the textile or subsequent further finishing steps, or subsequently after processing as a cover, upholstery or floor covering textile by treatment in the liquor, padding or spraying.
- Another method of applying the colloidal dispersions to the fiber material is to use these together with a cleaning agent, especially if the textile to be treated has been soiled by use or previous processing steps. It is preferable to finish goods that have not been equipped by the manufacturer after wet cleaning by spraying the preparation onto the goods.
- 1.7 g of sodium hydrogen carbonate and 8 g of a cationic surfactant are dissolved in 1700 g of distilled water at room temperature and heated to 70.degree. After this temperature has been reached, 300 g of methyltriethoxysilane and 12 g of tetraethoxysilane are added over the course of 4 hours, the temperature of the reaction mixture being kept at 70.degree. After the addition has ended, the resulting sol is stirred at 70 ° C. for 3 hours and then cooled to room temperature.
- the product obtained is an easily mobile, slightly opaque liquid.
- a tufted fabric with cut pile (100% polyamide) with a pile weight of 350 g / m was, after dyeing, equipped with 3% of the preparation according to the invention of Example 2, based on the pile weight, by spraying with the aid of a one-component spraying system and then dried on a stenter at 120 ° C for 5 minutes. The goods were then sheared evenly and the back was coated with a commercially available latex foam.
- Samples were also taken from the goods that had not been treated with the preparation according to the invention (sample A).
- a tufted fabric with cut pile (100% polyamide) with a pile weight of 1200 g / m 2 was after dyeing before drying with 3% of the preparation according to the invention of Example 1, based on the pile weight, after the pull-out process on a reel after dyeing in last rinsing bath treated at 30 ° C for 15 minutes. The subsequent drying was carried out on a stenter for 5 minutes at 150 ° C. The goods were then shaved evenly and the back was coated with a commercially available latex foam.
- Samples were taken from this material in accordance with the DIN regulations (sample B). Samples were also taken from the goods that had not been treated with the preparation according to the invention (sample A).
- a tufted fabric with cut pile (100% wool) with a pile weight of 850 g was equipped with 4% of the preparation according to the invention after the pull-out process in the yarn after dyeing in the last rinsing bath (15 '/ 30 ° C.). Drying at 120 ° C. The yarn was then deepened, sheared and coated.
- Pieces of 50 x 30 cm were removed and subjected to a walk test by laying two treated and two untreated samples in a checkered manner in a passenger elevator cabin. In the cabin room, the material is subjected to a more intensive surface stress due to the rotating movements of the people using the elevator than when walking on it. The number of inspections is counted electronically. After every 10,000 inspections, the samples in the fields are exchanged cyclically to ensure an even load. After 30,000 inspections, the samples are removed and visually assessed by 6 different assessors. The surface change of the untreated samples (A) is compared to the treated samples (B)
- Samples of 30 x 30 cm were taken and laid out on a laboratory table covered with VA steel.
- the load was caused by a steel weight with a support surface coated with polytetrafluoroethylene. (Contact pressure: 78.6 g / cm 2 ; duration of the load: 24 hours).
- a PA tufted velor fabric (450 g / m 2 pile weight) was treated after dyeing by spraying before drying:
- Example 6 The mixture was then dried at 150 ° C. for 5 minutes and further treated as indicated in Example 3. The subsequent assessment was carried out as indicated in Example 6:
- a PA tufted velor fabric (450 g / m 2 pile weight) was treated after dyeing by spraying before drying:
- the mixture was then dried at 150 ° C. for 5 minutes, shaved evenly and the back was coated with a commercially available latex sheet foam.
- the samples are first soiled with 10 g of synthetic dirt of the following composition.
- the samples are loaded after the chair roller test, which is described in detail in the DIN regulation 54 324, with a total roller load of 60 kg and a change in the direction of roller rotation after every 50 revolutions.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Detergent Compositions (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81100613T ATE3217T1 (de) | 1980-02-09 | 1981-01-28 | Polstabilisierendes textilimpraegniermittel, verfahren zu dessen herstellung sowie damit ausgeruestete textile materialien. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803004824 DE3004824A1 (de) | 1980-02-09 | 1980-02-09 | Polstabilisierendes textilimpraegniermittel |
DE3004824 | 1980-02-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0036475A1 true EP0036475A1 (fr) | 1981-09-30 |
EP0036475B1 EP0036475B1 (fr) | 1983-05-04 |
Family
ID=6094185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81100613A Expired EP0036475B1 (fr) | 1980-02-09 | 1981-01-28 | Imprégnant destiné à stabiliser le poil d'un textile; procédé de préparation et textile traité avec ladite composition |
Country Status (8)
Country | Link |
---|---|
US (1) | US4351736A (fr) |
EP (1) | EP0036475B1 (fr) |
JP (1) | JPS56123480A (fr) |
AT (1) | ATE3217T1 (fr) |
CA (1) | CA1153511A (fr) |
DE (2) | DE3004824A1 (fr) |
DK (1) | DK52881A (fr) |
NO (1) | NO156094C (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0049832A1 (fr) * | 1980-10-15 | 1982-04-21 | Bayer Ag | Procédé continu de teinture et de finissage simultané de matières textiles |
EP0156102A2 (fr) * | 1984-03-27 | 1985-10-02 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Composition de poil |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3276329D1 (en) * | 1981-09-25 | 1987-06-19 | Procter & Gamble | Fabric softening compositions containing amino-silanes |
DE3307420A1 (de) * | 1983-03-03 | 1984-09-13 | Bayer Ag, 5090 Leverkusen | Textilausruestungsmittel |
US4618522A (en) * | 1983-12-19 | 1986-10-21 | General Electric Company | Organosiloxane fabric coating compositions |
JPS61159427A (ja) * | 1984-12-29 | 1986-07-19 | Toshiba Silicone Co Ltd | 表面処理用ポリオルガノシロキサン組成物 |
JPH0723585B2 (ja) * | 1989-11-06 | 1995-03-15 | 信越化学工業株式会社 | ウール処理剤 |
DE4441982A1 (de) | 1994-11-25 | 1996-05-30 | Bayer Ag | Öl-, wasser- und schmutzabweisend ausgerüstete Substrate und fluorhaltige Mittel hierzu |
US6468587B2 (en) | 2000-06-30 | 2002-10-22 | 3M Innovative Properties Company | Treatment of fibrous substrates with acidic silsesquioxanes emulsions |
WO2002064382A2 (fr) | 2001-01-31 | 2002-08-22 | 3M Innovative Properties Company | Revetement anti-salissure durcissable pour lamines |
US6736857B2 (en) | 2001-05-25 | 2004-05-18 | 3M Innovative Properties Company | Method for imparting soil and stain resistance to carpet |
EP1264863A1 (fr) * | 2001-06-08 | 2002-12-11 | Ciba Spezialitätenchemie Pfersee GmbH | Compositions contenant des polysiloxanes et d'autres polymères |
CA2367812A1 (fr) * | 2002-01-15 | 2003-07-15 | Robert F. Smith | Article abrasif avec un revetement hydrophile/lipophile |
JP4399359B2 (ja) * | 2002-06-19 | 2010-01-13 | ダウ・コーニング・コーポレイション | 耐火および耐汚染組成物 |
US7313840B2 (en) * | 2002-07-25 | 2008-01-01 | Charles E. Watkins | Induction liquid pump and magnetic tank scrubber |
US7335234B2 (en) * | 2002-10-16 | 2008-02-26 | Columbia Insurance Company | Method of treating fibers, carpet yarns and carpets to enhance repellency |
US20040147188A1 (en) * | 2003-01-28 | 2004-07-29 | 3M Innovative Properties Company | Fluorochemical urethane composition for treatment of fibrous substrates |
US20050015886A1 (en) * | 2003-07-24 | 2005-01-27 | Shaw Industries Group, Inc. | Methods of treating and cleaning fibers, carpet yarns and carpets |
US7135449B2 (en) * | 2004-02-20 | 2006-11-14 | Milliken & Company | Composition for removal of odors and contaminants from textiles and method |
US7320956B2 (en) * | 2004-04-01 | 2008-01-22 | 3M Innovative Properties Company | Aqueous cleaning/treatment composition for fibrous substrates |
US7785374B2 (en) | 2005-01-24 | 2010-08-31 | Columbia Insurance Co. | Methods and compositions for imparting stain resistance to nylon materials |
US8002886B2 (en) * | 2006-12-15 | 2011-08-23 | 3M Innovative Properties Company | Fluorochemical urethane compounds having pendent silyl groups used for surface treatment |
JP5415960B2 (ja) * | 2006-12-20 | 2014-02-12 | スリーエム イノベイティブ プロパティズ カンパニー | ペンダントシリル基を有するフルオロケミカルウレタン化合物 |
US7745653B2 (en) | 2007-03-08 | 2010-06-29 | 3M Innovative Properties Company | Fluorochemical compounds having pendent silyl groups |
US7335786B1 (en) | 2007-03-29 | 2008-02-26 | 3M Innovative Properties Company | Michael-adduct fluorochemical silanes |
GB2447959A (en) | 2007-03-30 | 2008-10-01 | 3M Innovative Properties Co | Fiber mat containing an organosilicon compound and pollution control device using it |
US7652116B2 (en) * | 2007-06-20 | 2010-01-26 | 3M Innovative Properties Company | Fluorochemical urethane-silane compounds and aqueous compositions thereof |
US7652117B2 (en) * | 2007-06-20 | 2010-01-26 | 3M Innovative Properties Company | Fluorochemical urethane compounds and aqueous compositions thereof |
WO2009048854A1 (fr) * | 2007-10-09 | 2009-04-16 | 3M Innovative Properties Company | Mat de montage d'un élément de dépollution pour le traitement d'un gaz d'échappement |
CN104947318A (zh) * | 2007-10-09 | 2015-09-30 | 3M创新有限公司 | 制备用于安装污染控制元件的安装垫的方法 |
KR101623217B1 (ko) | 2007-10-09 | 2016-05-20 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | 무기 나노입자를 포함하는 장착 매트 및 이의 제조 방법 |
US7754092B2 (en) * | 2007-10-31 | 2010-07-13 | E.I. Du Pont De Nemours And Company | Soil resist additive |
DE102008000585A1 (de) | 2008-03-10 | 2009-09-17 | Wacker Chemie Ag | Binderhaltige kolloidale wässrige Organopolysiloxandispersionen und deren Verwendung |
EP2159319A1 (fr) * | 2008-08-25 | 2010-03-03 | Basf Se | Procédé de traitement de substrats textiles |
WO2010026039A1 (fr) * | 2008-08-25 | 2010-03-11 | Basf Se | Procédé servant à traiter des substrats textiles |
GB0919014D0 (en) | 2009-10-30 | 2009-12-16 | 3M Innovative Properties Co | Soll and stain resistant coating composition for finished leather substrates |
US8057693B1 (en) | 2010-07-26 | 2011-11-15 | Arrowstar, Llc | Compositions and methods for imparting liquid repellency and dry soil resistance to fibers and articles thereof |
WO2013012964A2 (fr) | 2011-07-19 | 2013-01-24 | Continental Structural Plastics, Inc. | Résines thermodurcies améliorées contenant des charges cellulosiques d'origine naturelle prétraitéee |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3077460A (en) * | 1955-08-17 | 1963-02-12 | Celanese Corp | Composition comprising an organopolysiloxane and colloidal silica, and textile treated therewith |
GB975302A (en) * | 1962-03-09 | 1964-11-11 | Stauffer Chemical Co | Novel silicon-containing compositions |
FR1379313A (fr) * | 1963-12-30 | 1964-11-20 | Monsanto Co | Procédé de traitement de polyamides, notamment sous forme de fils, destiné à empêcher le glissement des noeuds de fils de ces polyamides |
GB1135757A (en) * | 1965-01-21 | 1968-12-04 | Dow Corning | Treatment of fibrous materials |
GB2010878A (en) * | 1977-12-23 | 1979-07-04 | Dow Corning | Organothiol-containing siloxane resins as adhesion promoters for siloxane resins |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA794874A (en) * | 1968-09-17 | G. Neuroth Charles | Reaction product coatings of alkyltrimethoxysilane/tetraalkylorthosilicate | |
US3431142A (en) * | 1965-08-19 | 1969-03-04 | Petchen Corp | Method of improving wearing qualities of organic fibers and fabrics |
US3642681A (en) * | 1969-01-14 | 1972-02-15 | Du Pont | Polysilicic acid coating composition |
US3917893A (en) * | 1974-02-04 | 1975-11-04 | Allied Chem | Polyamide yarn |
US3898090A (en) * | 1974-06-24 | 1975-08-05 | Dow Corning | Foundry mold and core compositions |
US3944702A (en) * | 1974-06-24 | 1976-03-16 | Dow Corning Corporation | Fibrous structures bonded with a silsesquioxane-containing composition |
US3959566A (en) * | 1974-10-21 | 1976-05-25 | E. I. Du Pont De Nemours And Company | Process for preparing polymeric surfaces to improve antistatic and soil resistant properties |
ZA795994B (en) * | 1978-11-30 | 1981-05-27 | Gen Electric | Silicone resin coating composition |
-
1980
- 1980-02-09 DE DE19803004824 patent/DE3004824A1/de not_active Withdrawn
-
1981
- 1981-01-22 US US06/227,444 patent/US4351736A/en not_active Expired - Lifetime
- 1981-01-28 DE DE8181100613T patent/DE3160212D1/de not_active Expired
- 1981-01-28 EP EP81100613A patent/EP0036475B1/fr not_active Expired
- 1981-01-28 AT AT81100613T patent/ATE3217T1/de not_active IP Right Cessation
- 1981-01-28 NO NO810295A patent/NO156094C/no unknown
- 1981-02-06 CA CA000370255A patent/CA1153511A/fr not_active Expired
- 1981-02-06 DK DK52881A patent/DK52881A/da not_active Application Discontinuation
- 1981-02-07 JP JP1632981A patent/JPS56123480A/ja active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3077460A (en) * | 1955-08-17 | 1963-02-12 | Celanese Corp | Composition comprising an organopolysiloxane and colloidal silica, and textile treated therewith |
GB975302A (en) * | 1962-03-09 | 1964-11-11 | Stauffer Chemical Co | Novel silicon-containing compositions |
FR1379313A (fr) * | 1963-12-30 | 1964-11-20 | Monsanto Co | Procédé de traitement de polyamides, notamment sous forme de fils, destiné à empêcher le glissement des noeuds de fils de ces polyamides |
GB1135757A (en) * | 1965-01-21 | 1968-12-04 | Dow Corning | Treatment of fibrous materials |
FR1578772A (fr) * | 1965-01-21 | 1969-08-22 | ||
GB2010878A (en) * | 1977-12-23 | 1979-07-04 | Dow Corning | Organothiol-containing siloxane resins as adhesion promoters for siloxane resins |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, Band 89, no. 112730g, page 191, Columbus, Ohio, US & JP - A - 53025655 (ASAHI CHEMICAL INDUSTRY CO LTD) (09-03-1978) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0049832A1 (fr) * | 1980-10-15 | 1982-04-21 | Bayer Ag | Procédé continu de teinture et de finissage simultané de matières textiles |
EP0156102A2 (fr) * | 1984-03-27 | 1985-10-02 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Composition de poil |
EP0156102A3 (en) * | 1984-03-27 | 1987-09-23 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Pile composition |
Also Published As
Publication number | Publication date |
---|---|
JPS646313B2 (fr) | 1989-02-02 |
ATE3217T1 (de) | 1983-05-15 |
DE3004824A1 (de) | 1981-08-20 |
DE3160212D1 (en) | 1983-06-09 |
EP0036475B1 (fr) | 1983-05-04 |
DK52881A (da) | 1981-08-10 |
US4351736A (en) | 1982-09-28 |
NO156094C (no) | 1987-07-22 |
NO810295L (no) | 1981-08-10 |
JPS56123480A (en) | 1981-09-28 |
CA1153511A (fr) | 1983-09-13 |
NO156094B (no) | 1987-04-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19810128 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT NL SE |
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