| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_372f621e4a675b73d440d854d69565a4 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-675
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-65 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-143 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-67
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-65 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H13-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H11-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-12 |
| filingDate |
2001-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2006-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_52e93bdba363591215c68a22c16f7556
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9725bc0ea3e757b7283af4cebafd7d53 |
| publicationDate |
2006-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6998015-B2 |
| titleOfInvention |
Method for reducing alkaline darkening of mechanical pulp containing a calcium carbonate filler |
| abstract |
A method is disclosed for reducing or inhibiting alkaline darkening of mechanical pulp caused by the presence of calcium carbonate filler during production; the method comprises adding a sulfite, or sulfur-containing reducing agent, especially a sulfite to the mechanical pulp and the filler; the method is usefully applied in the production of mechanical pulp and paper in which calcium carbonate is used as a filler and also in the production of paper at neutral or mildly alkaline conditions. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8246780-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007062653-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009294082-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8282778-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9932709-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105164338-B |
| priorityDate |
1998-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |