| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c3070783318d4f17db6ad97e418a5503 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N31-221 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N31-22 |
| filingDate |
1973-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb75a6b2694e89b70cece617234c65c0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f5c8a42714f0d98594b5fc156388076b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09cacdf1422dce75b6c59ca7e1b3cf49
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_18c32144a970f45fe2734c27aae646a9 |
| publicationDate |
1975-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-2358319-A1 |
| titleOfInvention |
INDICATOR SUBSTANCE |
| abstract |
Indicator (I) for determination of small amts. of concns. of strong protonic acids in non-aq. media comprises a spiropyran or spirooxazine which undergoes a colour-forming reaction with the acid and has rate constant (K) for the colour-forming reaction >=104 l/mole and molar extinction coeff. (epsilon) of the coloured-form of >=5 x 104l/mole. cm. (I) is esp. 2-n-amyl-7'-methoxy-spiro 3H-naphtho 2,1-b pyran-3,2'-2'H-benzo 1 pyran . |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0173407-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0173407-A3 |
| priorityDate |
1973-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |