SE408799B - Forfarande for framstellning av sintringsbar, finfordelad pvc-pressmassa genom suspensionspolymerisation av vc i vatten med oljeloslig aktivator i nervaro av en suspensionsstabilisator, ett non-jonogent vetmedel och ... - Google Patents
Forfarande for framstellning av sintringsbar, finfordelad pvc-pressmassa genom suspensionspolymerisation av vc i vatten med oljeloslig aktivator i nervaro av en suspensionsstabilisator, ett non-jonogent vetmedel och ...Info
- Publication number
- SE408799B SE408799B SE7402749A SE7402749A SE408799B SE 408799 B SE408799 B SE 408799B SE 7402749 A SE7402749 A SE 7402749A SE 7402749 A SE7402749 A SE 7402749A SE 408799 B SE408799 B SE 408799B
- Authority
- SE
- Sweden
- Prior art keywords
- emulsifier
- polymerization
- weight
- suspension
- acid
- Prior art date
Links
- 239000000725 suspension Substances 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 20
- 239000003381 stabilizer Substances 0.000 title claims description 14
- 238000002360 preparation method Methods 0.000 title claims description 4
- 238000010557 suspension polymerization reaction Methods 0.000 title claims description 4
- 239000012190 activator Substances 0.000 title claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 26
- 229920000642 polymer Polymers 0.000 claims description 35
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 22
- 239000003995 emulsifying agent Substances 0.000 claims description 22
- 239000002253 acid Substances 0.000 claims description 21
- 238000006116 polymerization reaction Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 12
- 239000004800 polyvinyl chloride Substances 0.000 claims description 12
- 239000000080 wetting agent Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 150000003460 sulfonic acids Chemical class 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000008346 aqueous phase Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 11
- 229920001213 Polysorbate 20 Polymers 0.000 description 9
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 9
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 150000007513 acids Chemical class 0.000 description 8
- LPTWEDZIPSKWDG-UHFFFAOYSA-N benzenesulfonic acid;dodecane Chemical compound OS(=O)(=O)C1=CC=CC=C1.CCCCCCCCCCCC LPTWEDZIPSKWDG-UHFFFAOYSA-N 0.000 description 8
- 229920000609 methyl cellulose Polymers 0.000 description 8
- 239000001923 methylcellulose Substances 0.000 description 8
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 8
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- UWNADWZGEHDQAB-UHFFFAOYSA-N 2,5-dimethylhexane Chemical group CC(C)CCC(C)C UWNADWZGEHDQAB-UHFFFAOYSA-N 0.000 description 2
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000004996 alkyl benzenes Chemical class 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- -1 sorbitan fatty acid esters Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UXCBMLGLQWBHGL-UHFFFAOYSA-N (2-cyclohexylsulfonylacetyl) 2-cyclohexylsulfonylethaneperoxoate Chemical compound C1CCCCC1S(=O)(=O)CC(=O)OOC(=O)CS(=O)(=O)C1CCCCC1 UXCBMLGLQWBHGL-UHFFFAOYSA-N 0.000 description 1
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 description 1
- RSOAMRXKGHCGNC-UHFFFAOYSA-N 2,3-ditert-butylnaphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(O)(=O)=O)=C(C(C)(C)C)C(C(C)(C)C)=CC2=C1 RSOAMRXKGHCGNC-UHFFFAOYSA-N 0.000 description 1
- IVMUPSZAZLJPIM-UHFFFAOYSA-N 2-nonylbenzenesulfonic acid Chemical class CCCCCCCCCC1=CC=CC=C1S(O)(=O)=O IVMUPSZAZLJPIM-UHFFFAOYSA-N 0.000 description 1
- NFPBWZOKGZKYRE-UHFFFAOYSA-N 2-propan-2-ylperoxypropane Chemical compound CC(C)OOC(C)C NFPBWZOKGZKYRE-UHFFFAOYSA-N 0.000 description 1
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- 239000004803 Di-2ethylhexylphthalate Substances 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 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
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- 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 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229920013820 alkyl cellulose Polymers 0.000 description 1
- 150000007860 aryl ester derivatives Chemical class 0.000 description 1
- 150000008378 aryl ethers Chemical class 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- ZFTFAPZRGNKQPU-UHFFFAOYSA-N dicarbonic acid Chemical compound OC(=O)OC(O)=O ZFTFAPZRGNKQPU-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920001290 polyvinyl ester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005029 sieve analysis Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F14/00—Homopolymers and 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
- C08F14/02—Monomers containing chlorine
- C08F14/04—Monomers containing two carbon atoms
- C08F14/06—Vinyl chloride
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2310431A DE2310431C3 (de) | 1973-03-02 | 1973-03-02 | Sinterfahige feinteilige Polyvinylchlorid-Formmassen, Verfahren zu ihrer Herstellung und ihre Verwendung |
| DE2402314A DE2402314C3 (de) | 1974-01-18 | 1974-01-18 | Verfahren zur Herstellung sinterfähiger, feinteiliger Polyvinylchlorid-Fonnmassen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE408799B true SE408799B (sv) | 1979-07-09 |
Family
ID=25764768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7402749A SE408799B (sv) | 1973-03-02 | 1974-03-01 | Forfarande for framstellning av sintringsbar, finfordelad pvc-pressmassa genom suspensionspolymerisation av vc i vatten med oljeloslig aktivator i nervaro av en suspensionsstabilisator, ett non-jonogent vetmedel och ... |
Country Status (16)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU76309A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1976-12-01 | 1978-07-10 | ||
| DE3334667A1 (de) * | 1983-09-24 | 1985-04-11 | Hoechst Ag, 6230 Frankfurt | Verfahren zur herstellung und verwendung einer sinterfaehigen, feinteiligen formmasse auf basis polyvinylchlorid |
| DE3543305A1 (de) * | 1985-12-07 | 1987-06-11 | Hoechst Ag | Sinterfaehige, feinteilige formmasse auf basis von vinylchlorid-polymerisaten |
-
1974
- 1974-02-22 NL NLAANVRAGE7402462,A patent/NL168852C/xx not_active IP Right Cessation
- 1974-02-25 ES ES423608A patent/ES423608A1/es not_active Expired
- 1974-02-26 BG BG025900A patent/BG28426A3/xx unknown
- 1974-02-28 HU HU74HO00001653A patent/HU171768B/hu not_active IP Right Cessation
- 1974-02-28 YU YU00521/74A patent/YU52174A/xx unknown
- 1974-02-28 RO RO7477862A patent/RO67835A/ro unknown
- 1974-02-28 CH CH285274A patent/CH617213A5/de not_active IP Right Cessation
- 1974-02-28 DD DD176865A patent/DD112136A5/xx unknown
- 1974-03-01 AT AT168774A patent/AT332120B/de not_active IP Right Cessation
- 1974-03-01 SE SE7402749A patent/SE408799B/sv not_active IP Right Cessation
- 1974-03-01 JP JP49023467A patent/JPS5810407B2/ja not_active Expired
- 1974-03-01 BR BR1494/74A patent/BR7401494D0/pt unknown
- 1974-03-01 IT IT48896/74A patent/IT1008987B/it active
- 1974-03-01 CA CA193,865A patent/CA1021096A/en not_active Expired
- 1974-03-04 FR FR7407223A patent/FR2219956B1/fr not_active Expired
- 1974-03-04 GB GB960074A patent/GB1461905A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5810407B2 (ja) | 1983-02-25 |
| RO67835A (ro) | 1980-12-30 |
| AU6618974A (en) | 1975-09-04 |
| BG28426A3 (en) | 1980-04-15 |
| HU171768B (hu) | 1978-03-28 |
| YU52174A (en) | 1982-05-31 |
| GB1461905A (en) | 1977-01-19 |
| AT332120B (de) | 1976-09-10 |
| CH617213A5 (en) | 1980-05-14 |
| NL7402462A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1974-09-04 |
| ATA168774A (de) | 1975-12-15 |
| FR2219956B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-09-30 |
| ES423608A1 (es) | 1976-11-01 |
| FR2219956A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1974-09-27 |
| CA1021096A (en) | 1977-11-15 |
| BR7401494D0 (pt) | 1974-11-05 |
| IT1008987B (it) | 1976-11-30 |
| NL168852C (nl) | 1982-05-17 |
| JPS5058157A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1975-05-20 |
| DD112136A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1975-03-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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