| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7073bac5657e4b152760cce91c32920f |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08H99-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K35-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P43-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K35-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K35-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07G99-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08H99-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K35-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P43-00 |
| filingDate |
1988-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1990-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_564ca2b72ea711465b783139ff359ae7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9c179c9bd800ec5d7f0e830ac107eda
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb481a79cdd5e81b9d9bcadae98b376c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3862f0949f8b012f8dd2e92b8e9ace36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1676c0682e0b0155140683b5327a1e11 |
| publicationDate |
1990-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4921840-A |
| titleOfInvention |
Method for the preparation of low molecular weight alkali metal huminates |
| abstract |
The invention relates to a synthetic preparation of alkali metal salts of low molecular weight humic acids wherein multi-valent phenols are oxidized in a weakly alkaline aqueous medium at a temperature in the range of 15 DEG to 40 DEG C. Subsequently, the reaction mixture is adjusted to a pH value ranging between 6.2 and 7.2 and/or buffered. The low molecular alkali metal huminate is then purified through purification means including preparatory chromotography, ultra-filtration, ultra-centrifugation, or electrodialysis and separated from undesirable by-products. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6534049-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6569416-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6524567-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6524566-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5284651-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5456935-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6576229-B2 |
| priorityDate |
1987-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |