DE2147168C3 - Verfahren zum Herstellen eines Rohres aus einem thermoplastischen Kunststoff und einem härtbaren Kunststoff - Google Patents
Verfahren zum Herstellen eines Rohres aus einem thermoplastischen Kunststoff und einem härtbaren KunststoffInfo
- Publication number
- DE2147168C3 DE2147168C3 DE2147168A DE2147168A DE2147168C3 DE 2147168 C3 DE2147168 C3 DE 2147168C3 DE 2147168 A DE2147168 A DE 2147168A DE 2147168 A DE2147168 A DE 2147168A DE 2147168 C3 DE2147168 C3 DE 2147168C3
- Authority
- DE
- Germany
- Prior art keywords
- synthetic resin
- plasticizer
- pipe
- thermoplastic
- plastic
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229920001169 thermoplastic Polymers 0.000 title claims description 6
- 229920003023 plastic Polymers 0.000 title description 5
- 239000004033 plastic Substances 0.000 title description 5
- 239000004014 plasticizer Substances 0.000 claims description 27
- 229920003002 synthetic resin Polymers 0.000 claims description 24
- 239000000057 synthetic resin Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 229920001187 thermosetting polymer Polymers 0.000 claims description 13
- 239000000047 product Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000012815 thermoplastic material Substances 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000013067 intermediate product Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 9
- 239000003381 stabilizer Substances 0.000 description 6
- 239000012190 activator Substances 0.000 description 5
- -1 dioctylphthalal Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- UICXTANXZJJIBC-UHFFFAOYSA-N 1-(1-hydroperoxycyclohexyl)peroxycyclohexan-1-ol Chemical compound C1CCCCC1(O)OOC1(OO)CCCCC1 UICXTANXZJJIBC-UHFFFAOYSA-N 0.000 description 1
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- SNAMIIGIIUQQSP-UHFFFAOYSA-N bis(6-methylheptyl) hydrogen phosphate Chemical compound CC(C)CCCCCOP(O)(=O)OCCCCCC(C)C SNAMIIGIIUQQSP-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LDLDYFCCDKENPD-UHFFFAOYSA-N ethenylcyclohexane Chemical compound C=CC1CCCCC1 LDLDYFCCDKENPD-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- YCWSUKQGVSGXJO-NTUHNPAUSA-N nifuroxazide Chemical group C1=CC(O)=CC=C1C(=O)N\N=C\C1=CC=C([N+]([O-])=O)O1 YCWSUKQGVSGXJO-NTUHNPAUSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
- F16L9/128—Reinforced pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/16—Straightening or flattening
- B29C53/20—Straightening or flattening of tubes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/08—Heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/007—Hardness
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8336370 | 1970-09-24 | ||
| JP9397070 | 1970-09-24 | ||
| JP9396870U JPS4927503Y1 (enExample) | 1970-09-24 | 1970-09-24 | |
| JP8336670 | 1970-09-24 | ||
| JP45083365A JPS4928903B1 (enExample) | 1970-09-24 | 1970-09-24 | |
| JP8336470 | 1970-09-24 | ||
| JP9396970 | 1970-09-24 | ||
| JP9396770U JPS4927504Y1 (enExample) | 1970-09-24 | 1970-09-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2147168A1 DE2147168A1 (de) | 1972-03-30 |
| DE2147168B2 DE2147168B2 (de) | 1981-01-29 |
| DE2147168C3 true DE2147168C3 (de) | 1981-09-24 |
Family
ID=27572753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2147168A Expired DE2147168C3 (de) | 1970-09-24 | 1971-09-22 | Verfahren zum Herstellen eines Rohres aus einem thermoplastischen Kunststoff und einem härtbaren Kunststoff |
Country Status (20)
| Country | Link |
|---|---|
| AR (1) | AR196735A1 (enExample) |
| AT (1) | AT339587B (enExample) |
| AU (1) | AU462220B2 (enExample) |
| BE (1) | BE772923A (enExample) |
| BR (1) | BR7106340D0 (enExample) |
| CA (1) | CA987872A (enExample) |
| CH (1) | CH537801A (enExample) |
| DE (1) | DE2147168C3 (enExample) |
| DK (1) | DK143788C (enExample) |
| FI (1) | FI55009C (enExample) |
| FR (1) | FR2107947B1 (enExample) |
| GB (1) | GB1360678A (enExample) |
| IL (1) | IL37770A (enExample) |
| IT (1) | IT943558B (enExample) |
| LU (1) | LU63955A1 (enExample) |
| NL (1) | NL170606B (enExample) |
| NO (1) | NO137352C (enExample) |
| OA (1) | OA03914A (enExample) |
| PH (1) | PH11973A (enExample) |
| SE (1) | SE397295B (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE426369B (sv) * | 1978-07-28 | 1983-01-17 | Herbert Vollmar Jonasson | Forfarande och anordning for framstellning av ett armerat ror av herdplast |
| DE3212721A1 (de) * | 1982-04-05 | 1983-10-20 | Dynamit Nobel Ag, 5210 Troisdorf | Abschussrohr fuer flugkoerper |
| ITUD20110147A1 (it) * | 2011-09-23 | 2013-03-24 | Cifa Spa | Tubazione per il trasferimento di materiali abrasivi, quale calcestruzzo o materiali simili od assimilabili, e suo procedimento di realizzazione |
| DE102018124494A1 (de) * | 2018-10-04 | 2020-04-09 | DEULA-Nienburg GmbH | Rohr und Bewässerungssystem |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB593860A (en) * | 1945-06-16 | 1947-10-28 | Julius Veit | Improvements in and relating to the production of articles moulded from thermoplastic synthetic resin material |
| FR881918A (fr) * | 1939-04-05 | 1943-05-12 | Wacker Chemie Gmbh | Préparation de produits extrudés en chlorure de polyvinyle |
| DE1167514B (de) * | 1960-08-05 | 1964-04-09 | Alfred Roesler | Verfahren zum Herstellen von Profilen aus faserverstaerktem, haertbarem Kunstharz |
-
1971
- 1971-09-22 DE DE2147168A patent/DE2147168C3/de not_active Expired
- 1971-09-22 BE BE772923A patent/BE772923A/xx unknown
- 1971-09-22 AU AU33774/71A patent/AU462220B2/en not_active Expired
- 1971-09-22 CH CH1385671A patent/CH537801A/de not_active IP Right Cessation
- 1971-09-22 FI FI2643/71A patent/FI55009C/fi active
- 1971-09-23 NL NLAANVRAGE7113116,A patent/NL170606B/xx not_active IP Right Cessation
- 1971-09-23 IL IL7137770A patent/IL37770A/en unknown
- 1971-09-23 AT AT826271A patent/AT339587B/de not_active IP Right Cessation
- 1971-09-23 FR FR7134322A patent/FR2107947B1/fr not_active Expired
- 1971-09-23 DK DK465471A patent/DK143788C/da active
- 1971-09-23 NO NO713516A patent/NO137352C/no unknown
- 1971-09-23 OA OA54376A patent/OA03914A/xx unknown
- 1971-09-23 IT IT1294271A patent/IT943558B/it active
- 1971-09-23 CA CA123,559A patent/CA987872A/en not_active Expired
- 1971-09-23 PH PH12933A patent/PH11973A/en unknown
- 1971-09-23 SE SE7112060A patent/SE397295B/xx unknown
- 1971-09-24 GB GB4462971A patent/GB1360678A/en not_active Expired
- 1971-09-24 AR AR238148A patent/AR196735A1/es active
- 1971-09-24 BR BR6340/71A patent/BR7106340D0/pt unknown
- 1971-09-24 LU LU63955D patent/LU63955A1/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT943558B (it) | 1973-04-10 |
| NO137352C (no) | 1978-02-15 |
| PH11973A (en) | 1978-09-28 |
| DK143788C (da) | 1982-03-29 |
| AT339587B (de) | 1977-10-25 |
| CA987872A (en) | 1976-04-27 |
| NO137352B (no) | 1977-11-07 |
| FR2107947B1 (enExample) | 1976-04-02 |
| AU3377471A (en) | 1973-03-29 |
| FR2107947A1 (enExample) | 1972-05-12 |
| FI55009B (fi) | 1979-01-31 |
| BE772923A (fr) | 1972-01-17 |
| IL37770A (en) | 1974-09-10 |
| CH537801A (de) | 1973-06-15 |
| IL37770A0 (en) | 1971-11-29 |
| SE397295B (sv) | 1977-10-31 |
| AU462220B2 (en) | 1975-06-19 |
| LU63955A1 (enExample) | 1972-03-01 |
| BR7106340D0 (pt) | 1973-05-17 |
| GB1360678A (en) | 1974-07-17 |
| DE2147168A1 (de) | 1972-03-30 |
| DK143788B (da) | 1981-10-12 |
| NL7113116A (enExample) | 1972-03-28 |
| NL170606B (nl) | 1982-07-01 |
| DE2147168B2 (de) | 1981-01-29 |
| FI55009C (fi) | 1979-05-10 |
| OA03914A (fr) | 1975-08-14 |
| ATA826271A (de) | 1977-02-15 |
| AR196735A1 (es) | 1974-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |