DE2248244B2 - Extrudierbare einphasige Masse auf der Grundlage von Acrylnitril-Homo- oder Mischpolymerisaten und Wasser und ihre Herstellung und Verwendung - Google Patents
Extrudierbare einphasige Masse auf der Grundlage von Acrylnitril-Homo- oder Mischpolymerisaten und Wasser und ihre Herstellung und VerwendungInfo
- Publication number
- DE2248244B2 DE2248244B2 DE2248244A DE2248244A DE2248244B2 DE 2248244 B2 DE2248244 B2 DE 2248244B2 DE 2248244 A DE2248244 A DE 2248244A DE 2248244 A DE2248244 A DE 2248244A DE 2248244 B2 DE2248244 B2 DE 2248244B2
- Authority
- DE
- Germany
- Prior art keywords
- water
- thread
- polymer
- acrylonitrile
- amount
- 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.)
- Ceased
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 94
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims description 22
- 229920001577 copolymer Polymers 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920000642 polymer Polymers 0.000 claims description 75
- 239000000203 mixture Substances 0.000 claims description 46
- 125000002560 nitrile group Chemical group 0.000 claims description 45
- 230000036571 hydration Effects 0.000 claims description 26
- 238000006703 hydration reaction Methods 0.000 claims description 26
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 25
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 14
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 7
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 claims description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 238000001069 Raman spectroscopy Methods 0.000 claims description 3
- 229920001519 homopolymer Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 description 38
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 21
- 239000002904 solvent Substances 0.000 description 21
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
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- MHOFGBJTSNWTDT-UHFFFAOYSA-M 2-[n-ethyl-4-[(6-methoxy-3-methyl-1,3-benzothiazol-3-ium-2-yl)diazenyl]anilino]ethanol;methyl sulfate Chemical compound COS([O-])(=O)=O.C1=CC(N(CCO)CC)=CC=C1N=NC1=[N+](C)C2=CC=C(OC)C=C2S1 MHOFGBJTSNWTDT-UHFFFAOYSA-M 0.000 description 2
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
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- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
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- FVUJPXXDENYILK-WITUOYQCSA-N (4S)-5-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-5-amino-1-[[2-[[(2S)-1-[[(2S)-1-amino-3-methyl-1-oxobutan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-2-oxoethyl]amino]-1,5-dioxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-carboxy-1-oxopropan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]amino]-3-hydroxypropanoyl]amino]-3-carboxypropanoyl]amino]propanoyl]amino]-3-hydroxybutanoyl]amino]-3-phenylpropanoyl]amino]-3-hydroxybutanoyl]amino]-3-hydroxypropanoyl]amino]-5-oxopentanoic acid Chemical compound CC(C)C[C@H](NC(=O)CNC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](C)NC(=O)[C@H](CO)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](Cc1ccccc1)NC(=O)[C@@H](NC(=O)[C@H](C)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](N)Cc1cnc[nH]1)[C@@H](C)O)[C@@H](C)O)C(=O)N[C@@H](C(C)C)C(N)=O FVUJPXXDENYILK-WITUOYQCSA-N 0.000 description 1
- SMTDFMMXJHYDDE-UHFFFAOYSA-N 2-prop-1-enylpyridine Chemical compound CC=CC1=CC=CC=N1 SMTDFMMXJHYDDE-UHFFFAOYSA-N 0.000 description 1
- NOIIUHRQUVNIDD-UHFFFAOYSA-N 3-[[oxo(pyridin-4-yl)methyl]hydrazo]-N-(phenylmethyl)propanamide Chemical compound C=1C=CC=CC=1CNC(=O)CCNNC(=O)C1=CC=NC=C1 NOIIUHRQUVNIDD-UHFFFAOYSA-N 0.000 description 1
- VJOWMORERYNYON-UHFFFAOYSA-N 5-ethenyl-2-methylpyridine Chemical compound CC1=CC=C(C=C)C=N1 VJOWMORERYNYON-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
-
- 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
- B29C48/05—Filamentary, e.g. strands
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Multicomponent Fibers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18920271A | 1971-10-14 | 1971-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2248244A1 DE2248244A1 (de) | 1973-04-19 |
| DE2248244B2 true DE2248244B2 (de) | 1978-12-14 |
Family
ID=22696359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2248244A Ceased DE2248244B2 (de) | 1971-10-14 | 1972-10-02 | Extrudierbare einphasige Masse auf der Grundlage von Acrylnitril-Homo- oder Mischpolymerisaten und Wasser und ihre Herstellung und Verwendung |
Country Status (21)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2403947A1 (de) * | 1973-02-05 | 1974-08-08 | American Cyanamid Co | Schmelzspinnverfahren zur herstellung von geformten gegenstaenden aus acrylnitrilpolymerisaten |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873508A (en) * | 1973-12-27 | 1975-03-25 | Du Pont | Preparation of acrylonitrile polymer |
| US4238442A (en) * | 1978-12-29 | 1980-12-09 | E. I. Du Pont De Nemours And Company | Process for melt spinning acrylonitrile polymer hydrates |
| DE19959532C1 (de) * | 1999-12-10 | 2001-10-04 | Seitz Schenk Filtersystems Gmb | Verfahren und Vorrichtung zur Herstellung von filtrationsaktiven Fasern |
| GB2370248A (en) * | 1999-12-10 | 2002-06-26 | Seitzschenk Filtersystems Gmbh | Production of filtration-active fibres |
| EP3701083B1 (en) * | 2017-10-27 | 2022-12-07 | Bekaert Advanced Cords Aalter NV | Steel cord for elastomer reinforcement |
| CN120250238B (zh) * | 2025-06-04 | 2025-08-05 | 苏州宝丽迪材料科技股份有限公司 | 一种超薄高韧离子导电丝素蛋白纤维膜及其制备方法和应用 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585444A (en) * | 1948-07-29 | 1952-02-12 | Du Pont | Preparation of shaped articles from acrylonitrile polymers |
| US2585499A (en) * | 1948-07-29 | 1952-02-12 | Du Pont | Production of shaped articles from acrylonitrile polymers |
| US3402231A (en) * | 1964-05-21 | 1968-09-17 | Monsanto Co | Process for preparing synthetic fibers for paper products |
| US3388202A (en) * | 1965-09-27 | 1968-06-11 | Monsanto Co | Method for melting acrylonitrile polymers and copolymers |
| US3354856A (en) * | 1966-03-16 | 1967-11-28 | Joseph R Annibale | Submerged object lifting device |
| US3896204A (en) * | 1972-10-02 | 1975-07-22 | Du Pont | Melt-extrusion of acrylonitrile polymers into filaments |
| US3873508A (en) * | 1973-12-27 | 1975-03-25 | Du Pont | Preparation of acrylonitrile polymer |
-
0
- BE BE790107D patent/BE790107A/xx not_active IP Right Cessation
-
1972
- 1972-10-02 DE DE2248244A patent/DE2248244B2/de not_active Ceased
- 1972-10-06 CA CA153,494A patent/CA1034328A/en not_active Expired
- 1972-10-12 PL PL15823472A patent/PL74841B1/pl unknown
- 1972-10-12 IE IE2797/75A patent/IE36758B1/xx unknown
- 1972-10-12 IL IL40560A patent/IL40560A0/xx unknown
- 1972-10-12 ZA ZA727281A patent/ZA727281B/xx unknown
- 1972-10-12 IN IN1649/72A patent/IN139404B/en unknown
- 1972-10-12 IE IE1387/72A patent/IE36757B1/xx unknown
- 1972-10-13 NL NL7213907.A patent/NL164910C/xx not_active IP Right Cessation
- 1972-10-13 TR TR17873A patent/TR17873A/xx unknown
- 1972-10-13 CH CH1498072A patent/CH540306A/de not_active IP Right Cessation
- 1972-10-13 FR FR7236336A patent/FR2156337B1/fr not_active Expired
- 1972-10-13 AR AR244607A patent/AR198797A1/es active
- 1972-10-13 OA OA54724A patent/OA04203A/xx unknown
- 1972-10-13 LU LU66301A patent/LU66301A1/xx unknown
- 1972-10-13 BR BR007167/72A patent/BR7207167D0/pt unknown
- 1972-10-13 ES ES407614A patent/ES407614A1/es not_active Expired
- 1972-10-13 AU AU47757/72A patent/AU4775772A/en not_active Expired
- 1972-10-14 JP JP10238172A patent/JPS5442023B2/ja not_active Expired
- 1972-10-14 RO RO72514A patent/RO86220B/ro unknown
- 1972-10-16 GB GB4764672A patent/GB1414651A/en not_active Expired
- 1972-10-16 GB GB2790675A patent/GB1414652A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2403947A1 (de) * | 1973-02-05 | 1974-08-08 | American Cyanamid Co | Schmelzspinnverfahren zur herstellung von geformten gegenstaenden aus acrylnitrilpolymerisaten |
Also Published As
| Publication number | Publication date |
|---|---|
| TR17873A (tr) | 1976-09-01 |
| FR2156337A1 (enrdf_load_stackoverflow) | 1973-05-25 |
| IE36757L (en) | 1973-04-14 |
| ES407614A1 (es) | 1975-10-01 |
| ZA727281B (en) | 1973-08-29 |
| DE2248244A1 (de) | 1973-04-19 |
| IE36757B1 (en) | 1977-02-16 |
| NL7213907A (enrdf_load_stackoverflow) | 1973-04-17 |
| BE790107A (fr) | 1973-04-13 |
| IE36758B1 (en) | 1977-02-16 |
| LU66301A1 (enrdf_load_stackoverflow) | 1973-01-23 |
| IL40560A0 (en) | 1972-12-29 |
| NL164910B (nl) | 1980-09-15 |
| JPS4849839A (enrdf_load_stackoverflow) | 1973-07-13 |
| GB1414652A (en) | 1975-11-19 |
| CH540306A (de) | 1973-08-15 |
| CA1034328A (en) | 1978-07-11 |
| RO86220B (ro) | 1985-03-31 |
| OA04203A (fr) | 1979-12-31 |
| GB1414651A (en) | 1975-11-19 |
| AU4775772A (en) | 1974-04-26 |
| NL164910C (nl) | 1981-02-16 |
| JPS5442023B2 (enrdf_load_stackoverflow) | 1979-12-12 |
| PL74841B1 (en) | 1974-12-31 |
| AR198797A1 (es) | 1974-07-24 |
| RO86220A (ro) | 1985-03-15 |
| FR2156337B1 (enrdf_load_stackoverflow) | 1977-04-01 |
| BR7207167D0 (pt) | 1973-07-26 |
| IN139404B (enrdf_load_stackoverflow) | 1976-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8235 | Patent refused |