| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d89a1fdfad4ceb45818cee0bfda31a6 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-1702 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-17 |
| filingDate |
1999-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_21346151eab3b05b36a426e29b87d45c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fd508faf91c134fd97dcf9e285148483
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85f656f65fc2ff4aacf483b223f91d41
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ceace6f3198bbb6f92a043cac5c7341 |
| publicationDate |
2001-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6244101-B1 |
| titleOfInvention |
Photoacoustic method for measuring concentration of chemical species |
| abstract |
The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein at least a first piezoelectric element has a first frequency and at least a second piezoelectric element has a second frequency. The improvement according to the present invention is that at least two piezoelectric elements are longitudinal elements for longitudinal waves; and the first frequency is different from said second frequency. In other words, the invention is a multi-frequency longitudinal transducer for photoacoustic detection. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8235578-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016313288-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003065264-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6873415-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6920399-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005117155-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008255433-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6999174-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2538013-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003090664-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7245380-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10241088-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015112817-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008074945-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7678049-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003236635-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004243003-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7304732-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6729185-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6870626-B2 |
| priorityDate |
1999-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |