DE2213933A1 - Verfahren zum Stabilisieren von Propansulton - Google Patents
Verfahren zum Stabilisieren von PropansultonInfo
- Publication number
- DE2213933A1 DE2213933A1 DE19722213933 DE2213933A DE2213933A1 DE 2213933 A1 DE2213933 A1 DE 2213933A1 DE 19722213933 DE19722213933 DE 19722213933 DE 2213933 A DE2213933 A DE 2213933A DE 2213933 A1 DE2213933 A1 DE 2213933A1
- Authority
- DE
- Germany
- Prior art keywords
- propane sultone
- amines
- propane
- pyridine
- color
- 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
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 title claims description 42
- 230000000087 stabilizing effect Effects 0.000 title description 7
- 238000000034 method Methods 0.000 title description 6
- -1 aliphatic amines Chemical class 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000007795 chemical reaction product Substances 0.000 claims description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 11
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 150000001414 amino alcohols Chemical class 0.000 claims description 6
- 229940111121 antirheumatic drug quinolines Drugs 0.000 claims description 6
- 150000003222 pyridines Chemical class 0.000 claims description 6
- 150000003248 quinolines Chemical class 0.000 claims description 6
- 150000001408 amides Chemical class 0.000 claims description 5
- 150000004982 aromatic amines Chemical class 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000001294 propane Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 29
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 14
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 12
- 239000000654 additive Substances 0.000 description 11
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 150000001412 amines Chemical class 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 6
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 6
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 6
- 238000002845 discoloration Methods 0.000 description 6
- 150000003974 aralkylamines Chemical class 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 241001550224 Apha Species 0.000 description 4
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 4
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 4
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 4
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 4
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 4
- SMUQFGGVLNAIOZ-UHFFFAOYSA-N quinaldine Chemical compound C1=CC=CC2=NC(C)=CC=C21 SMUQFGGVLNAIOZ-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 3
- NMMIHXMBOZYNET-UHFFFAOYSA-N Methyl picolinate Chemical compound COC(=O)C1=CC=CC=N1 NMMIHXMBOZYNET-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical compound [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- TUAMRELNJMMDMT-UHFFFAOYSA-N 3,5-xylenol Chemical compound CC1=CC(C)=CC(O)=C1 TUAMRELNJMMDMT-UHFFFAOYSA-N 0.000 description 2
- ITQTTZVARXURQS-UHFFFAOYSA-N 3-methylpyridine Chemical compound CC1=CC=CN=C1 ITQTTZVARXURQS-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-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
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 2
- DFPAKSUCGFBDDF-UHFFFAOYSA-N Nicotinamide Chemical compound NC(=O)C1=CC=CN=C1 DFPAKSUCGFBDDF-UHFFFAOYSA-N 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 239000003708 ampul Substances 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000012971 dimethylpiperazine Substances 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- JJWLVOIRVHMVIS-UHFFFAOYSA-N isopropylamine Chemical compound CC(C)N JJWLVOIRVHMVIS-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 150000003512 tertiary amines Chemical class 0.000 description 2
- QWBBPBRQALCEIZ-UHFFFAOYSA-N 2,3-dimethylphenol Chemical compound CC1=CC=CC(O)=C1C QWBBPBRQALCEIZ-UHFFFAOYSA-N 0.000 description 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- NRGGMCIBEHEAIL-UHFFFAOYSA-N 2-ethylpyridine Chemical compound CCC1=CC=CC=N1 NRGGMCIBEHEAIL-UHFFFAOYSA-N 0.000 description 1
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- XTUVJUMINZSXGF-UHFFFAOYSA-N N-methylcyclohexylamine Chemical compound CNC1CCCCC1 XTUVJUMINZSXGF-UHFFFAOYSA-N 0.000 description 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N N-phenyl amine Natural products NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 1
- BHHGXPLMPWCGHP-UHFFFAOYSA-N Phenethylamine Chemical compound NCCC1=CC=CC=C1 BHHGXPLMPWCGHP-UHFFFAOYSA-N 0.000 description 1
- WUGQZFFCHPXWKQ-UHFFFAOYSA-N Propanolamine Chemical compound NCCCO WUGQZFFCHPXWKQ-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- RMRFFCXPLWYOOY-UHFFFAOYSA-N allyl radical Chemical compound [CH2]C=C RMRFFCXPLWYOOY-UHFFFAOYSA-N 0.000 description 1
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 description 1
- VEQOALNAAJBPNY-UHFFFAOYSA-N antipyrine Chemical compound CN1C(C)=CC(=O)N1C1=CC=CC=C1 VEQOALNAAJBPNY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001723 carbon free-radicals Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 150000001923 cyclic compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- YVUBWJOBCFNMES-UHFFFAOYSA-N formamide;pyridine Chemical compound NC=O.C1=CC=NC=C1 YVUBWJOBCFNMES-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LHGVFZTZFXWLCP-UHFFFAOYSA-N guaiacol Chemical compound COC1=CC=CC=C1O LHGVFZTZFXWLCP-UHFFFAOYSA-N 0.000 description 1
- 150000003951 lactams Chemical class 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229960001238 methylnicotinate Drugs 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- ZZZBVPGKGDEHGL-UHFFFAOYSA-N morpholine piperidine Chemical compound C1CCNCC1.C1COCCN1.C1COCCN1 ZZZBVPGKGDEHGL-UHFFFAOYSA-N 0.000 description 1
- OJLAIADDFZTHNH-UHFFFAOYSA-N n-ethylethanamine;2-phenylethanamine Chemical compound CCNCC.NCCC1=CC=CC=C1 OJLAIADDFZTHNH-UHFFFAOYSA-N 0.000 description 1
- 235000005152 nicotinamide Nutrition 0.000 description 1
- 239000011570 nicotinamide Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D327/00—Heterocyclic compounds containing rings having oxygen and sulfur atoms as the only ring hetero atoms
- C07D327/10—Heterocyclic compounds containing rings having oxygen and sulfur atoms as the only ring hetero atoms two oxygen atoms and one sulfur atom, e.g. cyclic sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrogenated Pyridines (AREA)
- Pyridine Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1700571 | 1971-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2213933A1 true DE2213933A1 (de) | 1972-09-28 |
Family
ID=11931875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722213933 Pending DE2213933A1 (de) | 1971-03-24 | 1972-03-22 | Verfahren zum Stabilisieren von Propansulton |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3829438A (enExample) |
| DE (1) | DE2213933A1 (enExample) |
| FR (1) | FR2130581B1 (enExample) |
| GB (1) | GB1380824A (enExample) |
| IT (1) | IT950689B (enExample) |
| NL (1) | NL7203957A (enExample) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565415B (zh) * | 2009-05-27 | 2012-08-29 | 太仓华一化工科技有限公司 | 一种1,3-丙烷磺酸内酯的保存方法 |
| CN102603704B (zh) * | 2012-01-18 | 2013-11-27 | 山东瀛寰化工有限公司 | 一种降低1，3-丙烷磺酸内酯酸值的方法 |
| CN102637900A (zh) * | 2012-04-01 | 2012-08-15 | 能一郎科技股份有限公司 | 锂离子电池电解液的一种添加剂添加新方法 |
-
1972
- 1972-03-22 DE DE19722213933 patent/DE2213933A1/de active Pending
- 1972-03-22 US US00236994A patent/US3829438A/en not_active Expired - Lifetime
- 1972-03-22 IT IT22297/72A patent/IT950689B/it active
- 1972-03-23 GB GB1360172A patent/GB1380824A/en not_active Expired
- 1972-03-23 FR FR727210150A patent/FR2130581B1/fr not_active Expired
- 1972-03-24 NL NL7203957A patent/NL7203957A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| GB1380824A (en) | 1975-01-15 |
| FR2130581B1 (enExample) | 1973-06-29 |
| NL7203957A (enExample) | 1972-09-26 |
| US3829438A (en) | 1974-08-13 |
| FR2130581A1 (enExample) | 1972-11-03 |
| IT950689B (it) | 1973-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3206350C2 (enExample) | ||
| DE1087609B (de) | Verfahren zur Herstellung von 3, 5-Diaminopyrazin-2, 6-dicarbon-saeureamiden | |
| DE69127976T2 (de) | Tropolonderivate und pharmazeutische zubereitungen davon zur vorbeugung und behandlung von ischämischen krankheiten | |
| DE2213933A1 (de) | Verfahren zum Stabilisieren von Propansulton | |
| DE1802162A1 (de) | Neue N-Pyridylmethyliden-homocystein-thiolacton-Verbindung und Verfahren zu ihrer Herstellung | |
| DE2152523B2 (de) | Stabile konzentrierte Lösungen von wasserlöslichen tertiären Ammonsalzen von Direktfarbstoffen, Verfahren zu deren Herstellung und ihre Verwendung zum Färben von Cellulosematerial, insbesondere Papier | |
| CH615914A5 (enExample) | ||
| DE1903817A1 (de) | Stabilisierte fluessige Formulierungen | |
| CH529766A (de) | Verfahren zur Herstellung von Aryloxy-isoalkyl- 2-imidazolinen | |
| DE2236732C2 (de) | Tetra-N-alkylderivate von bicyclischen Harnstoffen und Verfahren zur Herstellung dieser Tetra-N-alkylderivate | |
| DE3017875A1 (de) | Neue pyrazol- eckige klammer auf 1,2-a eckige klammer zu - eckige klammer auf 1,2,4 eckige klammer zu -triazol- 1,3,5-(2h)-trione, verfahren zu deren herstellung und deren verwendung | |
| EP2699555B1 (de) | Melaminthiosulfat | |
| DE155782C (enExample) | ||
| DE2632052A1 (de) | Verfahren zur stabilisierung von metaldehyd | |
| AT307420B (de) | Verfahren zur Herstellung von neuen 3-Aminoalkyl-4-phenyl-2(1H)-chinolonderivaten sowie deren Salzen | |
| DE931828C (de) | Verfahren zur Herstellung von AEthylendiaminderivaten | |
| AT203508B (de) | Verfahren zur Herstellung von neuen substituierten 3,5-Dioxo-tetrahydro-1,2,6-thiadiazin-1,1-dioxyden | |
| DE831539C (de) | Verfahren zur Verhinderung des Gasschwundes von gefaerbten Zelluloseverbindungen | |
| DE1445982A1 (de) | Verfahren fuer die Herstellung von 4-Amin-5-Arylazopyrimidin-Derivaten | |
| DE4136656A1 (de) | Verwendung von 3-amino-2-(benzoylamino)acrylsaeureestern als stabilisatoren fuer organische materialien | |
| DE825548C (de) | Verfahren zur Herstellung von neuen diquartaeren Salzen von Pyrimidylaminocinnolinen | |
| DE2114573B2 (de) | 4-Aminomethylbicyclo[2,2,2]-octancarbonsäurephenylester und deren Salze | |
| DE1210794B (de) | Verfahren zur Herstellung von N-Phenylacetyl-N'-acylharnstoffderivaten | |
| DE1953954A1 (de) | Neue substituierte 4-Thiazolalazomethine | |
| DE2935721A1 (de) | Sulfanilamide, verfahren zu ihrer herstellung und ihre verwendung als arzneimittel. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHA | Expiration of time for request for examination |