| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-003 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-08 |
| filingDate |
1993-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1995-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d58d8259c6a5a9017b8275c99606273
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9fa5579c0ceaa4556b929210230aacb2 |
| publicationDate |
1995-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5442048-A |
| titleOfInvention |
Process for the preparation of activated chitosans and their use in the preparation of chiotsan derivatives |
| abstract |
The invention relates to a process for the preparation of activated chitosans, in which process a chitosan is reacted with an acid for salt formation, preferably followed by a reaction with a base. The addition of acid and the addition of bases which is preferably to be effected in the activation are carried out in a suspending agent which largely prevents the chitosan salts from dissolving, suitable suspending agents can be both aqueous solutions of inorganic salts and organic or aqueous-organic solvents. The invention also relates to a process for the preparation of both water-soluble and water-insoluble chitosan derivatives by reacting the activated chitosans with reagents which are generally suitable for the reaction of polysaccharides or amines. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03004581-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5741783-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5891199-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6976537-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6696483-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114106217-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114106217-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6562762-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5968488-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6497904-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5962663-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114773531-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6248313-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6858230-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6287602-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6258755-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8518267-B2 |
| priorityDate |
1989-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |