| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d648658dd620f548c24de39659a5e9e3 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-266 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C7-4136 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C7-413
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C7-407
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-26 |
| filingDate |
2002-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_750fdffc2b5c7799d1e937f13265f981
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_614ebb8e6efc3d3d5e8a4dc4ca236d4d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cdd3231e46f84a4baf379c095a737375
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_457102c6b05eacb1d8cd9c5b340d109a |
| publicationDate |
2003-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-03034147-A1 |
| titleOfInvention |
Process for preparing p-phenylenediamine color developers in a concentrated free-base form |
| abstract |
An improved method for making a p-phenylenediamine color developeer concentrate in a free-base form wherein the sulfate or chloride salt of the color developer is contacted with an alkali metal hydroxide includes the steps of forming a liquid free-base layer and a water layer, separating the liquid free-base layer from the water layer; and mixing the liquid free-base with a water soluble hydroxy organic solvent, wherein the p-phenylenediamine color developer concentrate has at least 0.06 mol/l of a color developing agent in the free base form. |
| priorityDate |
2001-10-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |