| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_34aa666e6eb8e8d3f61a0ed3ba55100c |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-08 |
| filingDate |
2000-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d97d78c0a48552a1c0b8acd7231da1e |
| publicationDate |
2001-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6277792-B1 |
| titleOfInvention |
Viscosified aqueous fluids and viscosifier therefor |
| abstract |
The present invention discloses a method of producing modified, derivatized chitosans which produce viscous aqueous liquids when dispersed (solublized) in compatible aqueous liquids. The method comprises reacting chitosan in an acidic solution with an aldehyde-group containing chemical modifier at an elevated temperature wherein the concentration of chitosan in the acidic solution and the reaction time at the elevated temperature are sufficient to produce a semi-solid gel. The preferred chemical modifier is one or more saccharides containing less than about 10 saccharide units, most preferably lactose. The preferred reaction temperature is greater than about 60° C., and the preferred concentration of chitosan is at least about 1.43% w/v. The invention also discloses the acidic chitosan-containing concentrates prepared by the method, and the viscous acidic fluids prepared by dispersing/solubilizing the concentrates in aqueous liquids. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6756363-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003141062-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009202640-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102006005385-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6562762-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8951991-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006189573-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03105590-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11071750-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2018116224-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6976537-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009197832-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009075845-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6764981-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/IT-201600130342-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009105097-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9034803-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110982507-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007135116-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7858561-B2 |
| priorityDate |
1998-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |