NO126662B - - Google Patents
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- Publication number
- NO126662B NO126662B NO00164271A NO16427166A NO126662B NO 126662 B NO126662 B NO 126662B NO 00164271 A NO00164271 A NO 00164271A NO 16427166 A NO16427166 A NO 16427166A NO 126662 B NO126662 B NO 126662B
- Authority
- NO
- Norway
- Prior art keywords
- solvent
- polymer material
- phase
- solution
- capsules
- Prior art date
Links
- 239000002904 solvent Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 30
- 239000002775 capsule Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- 238000005191 phase separation Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 10
- 239000011162 core material Substances 0.000 claims description 8
- 238000005538 encapsulation Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 description 42
- 239000000243 solution Substances 0.000 description 24
- 239000012071 phase Substances 0.000 description 23
- 239000007788 liquid Substances 0.000 description 19
- 239000002245 particle Substances 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000011877 solvent mixture Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- -1 acetyl para-aminophenol Chemical compound 0.000 description 4
- 238000013019 agitation Methods 0.000 description 4
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000001856 Ethyl cellulose Substances 0.000 description 3
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001249 ethyl cellulose Polymers 0.000 description 3
- 235000019325 ethyl cellulose Nutrition 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000003209 petroleum derivative Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- HCFAJYNVAYBARA-UHFFFAOYSA-N 4-heptanone Chemical compound CCCC(=O)CCC HCFAJYNVAYBARA-UHFFFAOYSA-N 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229960001138 acetylsalicylic acid Drugs 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012456 homogeneous solution Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000006193 liquid solution Substances 0.000 description 2
- RSHAOIXHUHAZPM-UHFFFAOYSA-N magnesium hydride Chemical compound [MgH2] RSHAOIXHUHAZPM-UHFFFAOYSA-N 0.000 description 2
- 229910012375 magnesium hydride Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- 229920000896 Ethulose Polymers 0.000 description 1
- 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- GAMPNQJDUFQVQO-UHFFFAOYSA-N acetic acid;phthalic acid Chemical compound CC(O)=O.OC(=O)C1=CC=CC=C1C(O)=O GAMPNQJDUFQVQO-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229940008238 amphetamine sulfate Drugs 0.000 description 1
- PYHRZPFZZDCOPH-UHFFFAOYSA-N amphetamine sulfate Chemical compound OS(O)(=O)=O.CC(N)CC1=CC=CC=C1.CC(N)CC1=CC=CC=C1 PYHRZPFZZDCOPH-UHFFFAOYSA-N 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- SNDDIRAXSDUVKW-URVXVIKDSA-N dextromethorphan hcl Chemical compound Cl.C([C@@H]12)CCC[C@]11CCN(C)[C@H]2CC2=CC=C(OC)C=C21 SNDDIRAXSDUVKW-URVXVIKDSA-N 0.000 description 1
- 229960005257 dextromethorphan hydrochloride Drugs 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000037406 food intake Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000007902 hard capsule Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 230000001617 migratory effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- PLIKAWJENQZMHA-UHFFFAOYSA-N p-hydroxyphenylamine Natural products NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/08—Simple coacervation, i.e. addition of highly hydrophilic material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5089—Processes
-
- 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
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
-
- 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
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
- Y10T428/2985—Solid-walled microcapsule from synthetic polymer
- Y10T428/2987—Addition polymer from unsaturated monomers only
-
- 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
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2989—Microcapsule with solid core [includes liposome]
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing Of Micro-Capsules (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48077065A | 1965-08-18 | 1965-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO126662B true NO126662B (pl) | 1973-03-12 |
Family
ID=23909291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO00164271A NO126662B (pl) | 1965-08-18 | 1966-08-11 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3531418A (pl) |
| BE (1) | BE685510A (pl) |
| CH (1) | CH458296A (pl) |
| DE (1) | DE1519848B2 (pl) |
| DK (1) | DK142605B (pl) |
| FR (1) | FR1502760A (pl) |
| GB (1) | GB1099066A (pl) |
| NL (1) | NL154675B (pl) |
| NO (1) | NO126662B (pl) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755190A (en) * | 1971-11-09 | 1973-08-28 | Ncr | Capsule manufacture |
| BE791458A (fr) * | 1972-07-31 | 1973-05-16 | Merck & Co Inc | Produit microencapsule |
| JPS5432614A (en) * | 1977-08-11 | 1979-03-10 | Tanabe Seiyaku Co Ltd | Preparation of microcapsules containing pharmaceuticals |
| CH644768A5 (de) * | 1977-08-25 | 1984-08-31 | Sandoz Ag | Verfahren zur herstellung von mikrokugeln. |
| JPS6045845B2 (ja) * | 1979-10-31 | 1985-10-12 | 田辺製薬株式会社 | 医薬物質含有マイクロカプセルの製法 |
| JPS56152739A (en) * | 1980-04-25 | 1981-11-26 | Tanabe Seiyaku Co Ltd | Production of microcapsule |
| JPS57197214A (en) * | 1981-05-29 | 1982-12-03 | Tanabe Seiyaku Co Ltd | Rapid-releasing microcapsule and its preparation |
| US4800087A (en) * | 1986-11-24 | 1989-01-24 | Mehta Atul M | Taste-masked pharmaceutical compositions |
| HU201869B (en) * | 1988-12-30 | 1991-01-28 | Egyt Gyogyszervegyeszeti Gyar | Process for producing microcapsules of quick dissolving active component |
| US5026559A (en) * | 1989-04-03 | 1991-06-25 | Kinaform Technology, Inc. | Sustained-release pharmaceutical preparation |
| US4983401A (en) * | 1989-05-22 | 1991-01-08 | Kinaform Technology, Inc. | Sustained release pharmaceutical preparations having pH controlled membrane coatings |
| US5084278A (en) * | 1989-06-02 | 1992-01-28 | Nortec Development Associates, Inc. | Taste-masked pharmaceutical compositions |
| US5422122A (en) * | 1992-08-04 | 1995-06-06 | Eurand America, Incorporated | Controlled release potassium chloride tablet |
| US5376384A (en) * | 1992-12-23 | 1994-12-27 | Kinaform Technology, Inc. | Delayed, sustained-release pharmaceutical preparation |
| US20030180368A1 (en) * | 1998-03-14 | 2003-09-25 | Cenes Drug Delivery Limited | Production of microparticles |
| AU2001257107A1 (en) | 2000-04-20 | 2001-11-07 | Bristol-Myers Squibb Company | Taste masking coating composition |
| US8999372B2 (en) * | 2002-11-14 | 2015-04-07 | Cure Pharmaceutical Corporation | Methods for modulating dissolution, bioavailability, bioequivalence and drug delivery profile of thin film drug delivery systems, controlled-release thin film dosage formats, and methods for their manufacture and use |
| US9561182B2 (en) * | 2003-08-22 | 2017-02-07 | Cure Pharmaceutical Corporation | Edible films for administration of medicaments to animals, methods for their manufacture and methods for their use for the treatment of animals |
| US20040191302A1 (en) | 2003-03-28 | 2004-09-30 | Davidson Robert S. | Method and apparatus for minimizing heat, moisture, and shear damage to medicants and other compositions during incorporation of same with edible films |
| US20040131662A1 (en) | 2003-11-12 | 2004-07-08 | Davidson Robert S. | Method and apparatus for minimizing heat, moisture, and shear damage to medicants and other compositions during incorporation of same with edible films |
| US7632521B2 (en) * | 2003-07-15 | 2009-12-15 | Eurand, Inc. | Controlled release potassium chloride tablets |
| US20070196581A1 (en) * | 2006-01-31 | 2007-08-23 | Elizabeth Marcu | Process for coating a biodegradable item |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3155590A (en) * | 1962-08-02 | 1964-11-03 | Ncr Co | Encapsulation process and its product |
| US3317434A (en) * | 1963-07-10 | 1967-05-02 | Armour & Co | Method of encapsulating particulate matter by coacervation using gelatins of opposite isoionic ph |
-
1965
- 1965-08-18 US US480770A patent/US3531418A/en not_active Expired - Lifetime
-
1966
- 1966-07-08 GB GB30800/66A patent/GB1099066A/en not_active Expired
- 1966-08-11 NO NO00164271A patent/NO126662B/no unknown
- 1966-08-13 DE DE19661519848 patent/DE1519848B2/de not_active Ceased
- 1966-08-15 CH CH1182466A patent/CH458296A/fr unknown
- 1966-08-16 BE BE685510D patent/BE685510A/xx not_active IP Right Cessation
- 1966-08-17 DK DK420866AA patent/DK142605B/da unknown
- 1966-08-17 FR FR73213A patent/FR1502760A/fr not_active Expired
- 1966-08-18 NL NL666611661A patent/NL154675B/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BE685510A (pl) | 1967-02-01 |
| DK142605B (da) | 1980-12-01 |
| DE1519848A1 (de) | 1969-07-10 |
| DK142605C (pl) | 1981-07-13 |
| GB1099066A (en) | 1968-01-10 |
| US3531418A (en) | 1970-09-29 |
| NL154675B (nl) | 1977-10-17 |
| FR1502760A (fr) | 1967-11-24 |
| CH458296A (fr) | 1968-06-30 |
| DE1519848B2 (de) | 1971-01-28 |
| NL6611661A (pl) | 1967-02-20 |
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