CA1075007A - Support en polyester durcissant a la chaleur et ramene apres etirage, enduit d'un abrasif - Google Patents
Support en polyester durcissant a la chaleur et ramene apres etirage, enduit d'un abrasifInfo
- Publication number
- CA1075007A CA1075007A CA270,266A CA270266A CA1075007A CA 1075007 A CA1075007 A CA 1075007A CA 270266 A CA270266 A CA 270266A CA 1075007 A CA1075007 A CA 1075007A
- Authority
- CA
- Canada
- Prior art keywords
- backing material
- maker
- cloth
- coat
- size
- 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
Links
- 239000000463 material Substances 0.000 title claims abstract description 91
- 229920000728 polyester Polymers 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000004744 fabric Substances 0.000 claims abstract description 141
- 238000009998 heat setting Methods 0.000 claims abstract description 25
- 230000014759 maintenance of location Effects 0.000 claims abstract description 5
- 239000000047 product Substances 0.000 claims description 81
- 229920005989 resin Polymers 0.000 claims description 52
- 239000011347 resin Substances 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 42
- 229920001568 phenolic resin Polymers 0.000 claims description 26
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 25
- 229920001187 thermosetting polymer Polymers 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 7
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 206010043268 Tension Diseases 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 40
- 229920000742 Cotton Polymers 0.000 description 31
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 28
- 239000007787 solid Substances 0.000 description 23
- 238000009472 formulation Methods 0.000 description 20
- 238000000151 deposition Methods 0.000 description 17
- 230000008021 deposition Effects 0.000 description 17
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 15
- 235000013339 cereals Nutrition 0.000 description 15
- 239000002421 finishing Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000010276 construction Methods 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- LWZFANDGMFTDAV-BURFUSLBSA-N [(2r)-2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O LWZFANDGMFTDAV-BURFUSLBSA-N 0.000 description 8
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 8
- 235000011067 sorbitan monolaureate Nutrition 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 229910001610 cryolite Inorganic materials 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000002759 woven fabric Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920003987 resole Polymers 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 2
- WXUPOMXKMSVGDH-UHFFFAOYSA-N 3-amino-2,4,6-tribromobenzoic acid Chemical compound NC1=C(Br)C=C(Br)C(C(O)=O)=C1Br WXUPOMXKMSVGDH-UHFFFAOYSA-N 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- IVZJIPHAJINUAE-UHFFFAOYSA-N barium;octahydrate Chemical compound O.O.O.O.O.O.O.O.[Ba] IVZJIPHAJINUAE-UHFFFAOYSA-N 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000000469 dry deposition Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- CVQRWWZPTSCLHG-UHFFFAOYSA-N formaldehyde;phenol;hydrate Chemical compound O.O=C.OC1=CC=CC=C1 CVQRWWZPTSCLHG-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229940083608 sodium hydroxide Drugs 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- KMXPHBJUGYLXDM-LSDHHAIUSA-N 1-[(7r,8s)-7-hydroxy-6,6-dimethyl-7,8-dihydropyrano[2,3-f][2,1,3]benzoxadiazol-8-yl]piperidin-2-one Chemical compound N1([C@H]2C3=CC4=NON=C4C=C3OC([C@@H]2O)(C)C)CCCCC1=O KMXPHBJUGYLXDM-LSDHHAIUSA-N 0.000 description 1
- XZIIFPSPUDAGJM-UHFFFAOYSA-N 6-chloro-2-n,2-n-diethylpyrimidine-2,4-diamine Chemical compound CCN(CC)C1=NC(N)=CC(Cl)=N1 XZIIFPSPUDAGJM-UHFFFAOYSA-N 0.000 description 1
- 241000209761 Avena Species 0.000 description 1
- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 239000004908 Emulsion polymer Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 101100225582 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) nip-1 gene Proteins 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 241000220010 Rhode Species 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001058 brown pigment Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005029 sieve analysis Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229940035044 sorbitan monolaurate Drugs 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/02—Backings, e.g. foils, webs, mesh fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
- B24D3/285—Reaction products obtained from aldehydes or ketones
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Laminated Bodies (AREA)
- Treatment Of Fiber Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65432876A | 1976-02-02 | 1976-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1075007A true CA1075007A (fr) | 1980-04-08 |
Family
ID=24624405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA270,266A Expired CA1075007A (fr) | 1976-02-02 | 1977-01-20 | Support en polyester durcissant a la chaleur et ramene apres etirage, enduit d'un abrasif |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5295390A (fr) |
| AT (1) | AT366614B (fr) |
| AU (1) | AU515093B2 (fr) |
| BR (1) | BR7700623A (fr) |
| CA (1) | CA1075007A (fr) |
| CH (1) | CH621506A5 (fr) |
| DE (1) | DE2624029A1 (fr) |
| ES (1) | ES455497A1 (fr) |
| FR (1) | FR2339693A1 (fr) |
| GB (1) | GB1575972A (fr) |
| IT (1) | IT1077964B (fr) |
| NZ (1) | NZ183171A (fr) |
| SE (1) | SE419514B (fr) |
| ZA (1) | ZA77539B (fr) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2928484B1 (de) * | 1979-07-14 | 1980-10-16 | Ver Schmirgel & Maschf | Verfahren zur Herstellung flexibler Schleifmittel |
| DE3218441C1 (de) * | 1982-05-15 | 1983-04-21 | Vereinigte Schmirgel- und Maschinen-Fabriken AG, 3000 Hannover | Verfahren zum Herstellen von blatt- oder bandförmigen Schleifwerkzeugen |
| US4437865A (en) * | 1982-08-27 | 1984-03-20 | Carborundum Abrasive Company | Flexible backing material for use in coated abrasives |
| US4474585A (en) * | 1983-05-31 | 1984-10-02 | Norton Company | Synthetic yarn-reinforced flexible webs stabilized against elongation, coated abrasive thereon, and process therefor |
| US4682444A (en) * | 1984-05-07 | 1987-07-28 | Industrial Metal Products Corporation | Microfinishing apparatus and method |
| US4981747A (en) * | 1988-09-23 | 1991-01-01 | Kimberly-Clark Corporation | Composite elastic material including a reversibly necked material |
| US4965122A (en) * | 1988-09-23 | 1990-10-23 | Kimberly-Clark Corporation | Reversibly necked material |
| CA2101833A1 (fr) * | 1992-12-14 | 1994-06-15 | Kimberly-Clark Worldwide, Inc. | Non tisse elastique obtenu par fusion-soufflage et ayant des proprietes isolantes |
| US5320891A (en) * | 1992-12-31 | 1994-06-14 | Kimberly-Clark Corporation | Particle barrier nonwoven material |
| CA2116081C (fr) | 1993-12-17 | 2005-07-26 | Ann Louise Mccormack | Materiau permeable a l'air constitue d'une pellicule et d'un non-tisse colles |
| US6111163A (en) | 1996-12-27 | 2000-08-29 | Kimberly-Clark Worldwide, Inc. | Elastomeric film and method for making the same |
| US6037281A (en) | 1996-12-27 | 2000-03-14 | Kimberly-Clark Worldwide, Inc. | Cloth-like, liquid-impervious, breathable composite barrier fabric |
| US6015764A (en) | 1996-12-27 | 2000-01-18 | Kimberly-Clark Worldwide, Inc. | Microporous elastomeric film/nonwoven breathable laminate and method for making the same |
| US12059773B2 (en) | 2019-12-31 | 2024-08-13 | Saint-Gobain Abrasives, Inc. | Rigid backsize to prevent fiber disc curling |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3053020A (en) * | 1959-04-21 | 1962-09-11 | Carborundum Co | Sectional coated abrasive belt and process of making the same |
| FR1437227A (fr) * | 1964-07-28 | 1966-04-29 | Reichhold Chemie Ag | Toiles abrasives à liant phénolique |
| FR1434056A (fr) * | 1964-08-18 | 1966-04-01 | Reichhold Chemie Ag | Bandes de tissu de meulage pour le meulage au mouillé |
| US3639316A (en) * | 1966-03-16 | 1972-02-01 | Thomas J Argiro | Composition for reducing friction on coated abrasive cloth |
| DE1918030A1 (de) * | 1969-04-09 | 1970-11-26 | Kommandit Ges Holsteinische Te | Flexibles Schleifmittel |
| US3787273A (en) * | 1971-06-07 | 1974-01-22 | Norton Co | Low stretch sectional abrasive belts |
-
1976
- 1976-05-28 DE DE19762624029 patent/DE2624029A1/de not_active Withdrawn
- 1976-07-26 JP JP8830576A patent/JPS5295390A/ja active Pending
-
1977
- 1977-01-20 CA CA270,266A patent/CA1075007A/fr not_active Expired
- 1977-01-20 SE SE7700575A patent/SE419514B/xx not_active IP Right Cessation
- 1977-01-20 GB GB2245/77A patent/GB1575972A/en not_active Expired
- 1977-01-26 NZ NZ183171A patent/NZ183171A/xx unknown
- 1977-01-27 IT IT47816/77A patent/IT1077964B/it active
- 1977-01-31 ES ES455497A patent/ES455497A1/es not_active Expired
- 1977-02-01 ZA ZA00770539A patent/ZA77539B/xx unknown
- 1977-02-01 BR BR7700623A patent/BR7700623A/pt unknown
- 1977-02-01 AT AT0061177A patent/AT366614B/de not_active IP Right Cessation
- 1977-02-01 FR FR7702760A patent/FR2339693A1/fr active Granted
- 1977-02-01 AU AU21814/77A patent/AU515093B2/en not_active Expired
- 1977-02-01 CH CH119777A patent/CH621506A5/fr not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATA61177A (de) | 1981-09-15 |
| SE419514B (sv) | 1981-08-10 |
| AU2181477A (en) | 1978-08-10 |
| FR2339693B1 (fr) | 1982-04-23 |
| SE7700575L (sv) | 1977-08-03 |
| JPS5295390A (en) | 1977-08-10 |
| AT366614B (de) | 1982-04-26 |
| ES455497A1 (es) | 1978-01-01 |
| BR7700623A (pt) | 1977-10-04 |
| AU515093B2 (en) | 1981-03-19 |
| GB1575972A (en) | 1980-10-01 |
| CH621506A5 (en) | 1981-02-13 |
| FR2339693A1 (fr) | 1977-08-26 |
| NZ183171A (en) | 1980-02-21 |
| ZA77539B (en) | 1978-06-28 |
| IT1077964B (it) | 1985-05-08 |
| DE2624029A1 (de) | 1977-08-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |