DE1254759B - Verwendung einer organische Stickstoffoxyde enthaltenden Loesung als Magnetometerfluessigkeit - Google Patents
Verwendung einer organische Stickstoffoxyde enthaltenden Loesung als MagnetometerfluessigkeitInfo
- Publication number
- DE1254759B DE1254759B DEC31769A DEC0031769A DE1254759B DE 1254759 B DE1254759 B DE 1254759B DE C31769 A DEC31769 A DE C31769A DE C0031769 A DEC0031769 A DE C0031769A DE 1254759 B DE1254759 B DE 1254759B
- Authority
- DE
- Germany
- Prior art keywords
- solution according
- nitrogen oxide
- aza
- tetramethyl
- nitrogen
- 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.)
- Pending
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims description 55
- 125000001477 organic nitrogen group Chemical group 0.000 title claims description 5
- 239000012530 fluid Substances 0.000 title claims description 3
- 230000005291 magnetic effect Effects 0.000 claims description 66
- 239000002904 solvent Substances 0.000 claims description 60
- 125000004432 carbon atom Chemical group C* 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- -1 nitrogen oxide compound Chemical class 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 11
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 10
- 125000000623 heterocyclic group Chemical group 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 125000005842 heteroatom Chemical group 0.000 claims description 7
- CKJMHSMEPSUICM-UHFFFAOYSA-N di-tert-butyl nitroxide Chemical compound CC(C)(C)N([O])C(C)(C)C CKJMHSMEPSUICM-UHFFFAOYSA-N 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 125000000018 nitroso group Chemical group N(=O)* 0.000 claims description 3
- YOWKOPKYRBOWMO-UHFFFAOYSA-N 2,2,5,5-tetramethyl-1h-pyrrole Chemical compound CC1(C)NC(C)(C)C=C1 YOWKOPKYRBOWMO-UHFFFAOYSA-N 0.000 claims 3
- 229940125904 compound 1 Drugs 0.000 claims 3
- RKMGAJGJIURJSJ-UHFFFAOYSA-N 2,2,6,6-tetramethylpiperidine Chemical compound CC1(C)CCCC(C)(C)N1 RKMGAJGJIURJSJ-UHFFFAOYSA-N 0.000 claims 2
- FMRWQLAJBBKXDM-UHFFFAOYSA-N 2,2,5,5-tetramethylpyrrolidine Chemical compound CC1(C)CCC(C)(C)N1 FMRWQLAJBBKXDM-UHFFFAOYSA-N 0.000 claims 1
- 150000003254 radicals Chemical class 0.000 description 87
- 239000000243 solution Substances 0.000 description 42
- 230000010287 polarization Effects 0.000 description 25
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 15
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 239000000126 substance Substances 0.000 description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 12
- 239000013078 crystal Substances 0.000 description 12
- 238000005481 NMR spectroscopy Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- 238000002844 melting Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 150000001412 amines Chemical class 0.000 description 10
- JWUXJYZVKZKLTJ-UHFFFAOYSA-N Triacetonamine Chemical compound CC1(C)CC(=O)CC(C)(C)N1 JWUXJYZVKZKLTJ-UHFFFAOYSA-N 0.000 description 9
- 239000012071 phase Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000005298 paramagnetic effect Effects 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 241000931526 Acer campestre Species 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- HHEAADYXPMHMCT-UHFFFAOYSA-N dpph Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1[N]N(C=1C=CC=CC=1)C1=CC=CC=C1 HHEAADYXPMHMCT-UHFFFAOYSA-N 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 150000002829 nitrogen Chemical class 0.000 description 3
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 description 3
- OVARTBFNCCXQKS-UHFFFAOYSA-N propan-2-one;hydrate Chemical compound O.CC(C)=O OVARTBFNCCXQKS-UHFFFAOYSA-N 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 2
- 229910010082 LiAlH Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- CRVSVXOGJXPOSY-UHFFFAOYSA-N 2,2,6,6-tetramethylcyclohexan-1-ol Chemical compound CC1(C)CCCC(C)(C)C1O CRVSVXOGJXPOSY-UHFFFAOYSA-N 0.000 description 1
- AIMREYQYBFBEGQ-UHFFFAOYSA-N 2-methyl-2-nitropropane Chemical compound CC(C)(C)[N+]([O-])=O AIMREYQYBFBEGQ-UHFFFAOYSA-N 0.000 description 1
- FCJMCOVEXBZEMH-UHFFFAOYSA-N 3,3,5,5-tetramethylcyclopentene Chemical compound CC1(C)CC(C)(C)C=C1 FCJMCOVEXBZEMH-UHFFFAOYSA-N 0.000 description 1
- 240000007124 Brassica oleracea Species 0.000 description 1
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
- 235000012905 Brassica oleracea var viridis Nutrition 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 150000001204 N-oxides Chemical class 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000005644 Wolff-Kishner reduction reaction Methods 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 125000006297 carbonyl amino group Chemical group [H]N([*:2])C([*:1])=O 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- VFNGKCDDZUSWLR-UHFFFAOYSA-L disulfate(2-) Chemical compound [O-]S(=O)(=O)OS([O-])(=O)=O VFNGKCDDZUSWLR-UHFFFAOYSA-L 0.000 description 1
- VFNGKCDDZUSWLR-UHFFFAOYSA-N disulfuric acid Chemical compound OS(=O)(=O)OS(O)(=O)=O VFNGKCDDZUSWLR-UHFFFAOYSA-N 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012280 lithium aluminium hydride Substances 0.000 description 1
- 238000004452 microanalysis Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- MTZWHHIREPJPTG-UHFFFAOYSA-N phorone Chemical compound CC(C)=CC(=O)C=C(C)C MTZWHHIREPJPTG-UHFFFAOYSA-N 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 description 1
- 150000003681 vanadium Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/24—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Soft Magnetic Materials (AREA)
- Geophysics And Detection Of Objects (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR920081A FR1351587A (fr) | 1962-12-28 | 1962-12-28 | Polarisation dynamique des noyaux d'un solvant |
| FR935904A FR1365503A (fr) | 1963-05-24 | 1963-05-24 | Polarisation des noyaux d'un solvant par pompage électronique |
| FR946486A FR1376628A (fr) | 1963-09-04 | 1963-09-04 | Radicaux libres organiques à hétérocycle pentagonal, utilisables pour la polarisation des noyaux d'un solvant |
| FR947459A FR84349E (fr) | 1963-09-13 | 1963-09-13 | Polarisation des noyaux d'un solvant par pompage électronique |
| FR947629 | 1963-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1254759B true DE1254759B (de) | 1967-11-23 |
Family
ID=27515151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEC31769A Pending DE1254759B (de) | 1962-12-28 | 1963-12-27 | Verwendung einer organische Stickstoffoxyde enthaltenden Loesung als Magnetometerfluessigkeit |
Country Status (10)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1623381B1 (de) * | 1966-02-04 | 1971-08-26 | Commissariat Energie Atomique | Magnetischer gradientenmesser |
| DE1623382B1 (de) * | 1966-02-04 | 1971-12-23 | Commissariat Energie Atomique | Vorrichtung und anordnung zur kompensation magnetischer eigen störfelder für ein von einem fahrzeug getragenes magnetometer |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1447226A (fr) * | 1965-04-22 | 1966-07-29 | Commissariat Energie Atomique | Magnétomètre à résonance magnétique nucléaire du type oscillateur à couplage de spin |
| US3403326A (en) * | 1966-06-27 | 1968-09-24 | Commissariat Energie Atomique | Magnetic resonance magnetometers |
| FR2531233A1 (fr) * | 1982-07-29 | 1984-02-03 | Mehier Henri | Dispositif pour detecter et mesurer le gradient d'un champ magnetique |
| US4546317A (en) * | 1983-07-01 | 1985-10-08 | The United States Of America As Represented By The Secretary Of The Navy | Free nuclear precession gradiometer system |
| FR2727963B1 (fr) * | 1994-12-07 | 1997-01-10 | Commissariat Energie Atomique | Solution contenant un radical nitroxyde pour la magnetometrie par resonance magnetique nucleaire |
| CA2443718A1 (en) | 2001-06-13 | 2002-12-19 | Ciba Specialty Chemicals Holding Inc. | 4-imino-n-alkoxy or oxy-polyalkyl-piperidine compounds and their use as polymerization regulators |
| CN110964349B (zh) * | 2018-09-30 | 2021-08-17 | 山东欧铂新材料有限公司 | 一种氧化改性炭黑及其制备方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3080519A (en) * | 1963-03-05 | Nuclear maser | ||
| BE566137A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1957-06-01 | |||
| NL246698A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1958-12-22 | |||
| NL266727A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1960-07-05 |
-
0
- ES ES0294882A patent/ES294882A1/es not_active Expired
- NL NL302622D patent/NL302622A/xx unknown
-
1962
- 1962-12-28 FR FR920081A patent/FR1351587A/fr not_active Expired
-
1963
- 1963-12-18 BE BE641458A patent/BE641458A/xx unknown
- 1963-12-20 LU LU45067D patent/LU45067A1/xx unknown
- 1963-12-23 CH CH1581763A patent/CH455307A/fr unknown
- 1963-12-24 GB GB50940/63A patent/GB1076700A/en not_active Expired
- 1963-12-24 NL NL63302622A patent/NL145051B/xx not_active IP Right Cessation
- 1963-12-27 US US333901A patent/US3249856A/en not_active Expired - Lifetime
- 1963-12-27 DE DEC31769A patent/DE1254759B/de active Pending
- 1963-12-27 SE SE14505/63A patent/SE312448B/xx unknown
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1623381B1 (de) * | 1966-02-04 | 1971-08-26 | Commissariat Energie Atomique | Magnetischer gradientenmesser |
| DE1623382B1 (de) * | 1966-02-04 | 1971-12-23 | Commissariat Energie Atomique | Vorrichtung und anordnung zur kompensation magnetischer eigen störfelder für ein von einem fahrzeug getragenes magnetometer |
Also Published As
| Publication number | Publication date |
|---|---|
| NL302622A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | |
| ES294882A1 (es) | 1964-06-01 |
| SE312448B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1969-07-14 |
| GB1076700A (en) | 1967-07-19 |
| LU45067A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1964-02-20 |
| CH455307A (fr) | 1968-06-28 |
| NL145051B (nl) | 1975-02-17 |
| FR1351587A (fr) | 1964-02-07 |
| US3249856A (en) | 1966-05-03 |
| BE641458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1964-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 |