| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e222f684bc2f655cba6e7d735154957 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B42D2035-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-87
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23K2101-007 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23K26-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B41-009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23K26-361
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B44F1-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B42D25-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A44C17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B41M5-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A44C27-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B41-0036
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23K26-032 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K26-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A44C17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K26-03 |
| filingDate |
2005-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2007-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fd6ec84c79af369bbbdbaa77579e707e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6b8e2a5e4a9275b7549302b7e8b8f779
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_789abec03b114398c8cf66dbd981d2b3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f53071d568b0d73f0cb4a78efb7fdc12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d87bfaedd8e1ee6dce1a43ea605a3a33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53370e129259676262ec700635ea6b65 |
| publicationDate |
2007-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7284396-B2 |
| titleOfInvention |
Method and system for laser marking in the volume of gemstones such as diamonds |
| abstract |
A method and an apparatus for laser marking indicia in the volume of gemstones such as diamonds, the indicia being made up of a plurality of microscopic dot-shaped marks whose build-up can be initiated by exposing naturally-occurring internal defects or impurities in the volume of a gemstone to a tightly focused train of laser pulses. Authentication data is encoded in the gemstone from the relative spatial arrangement of the dot-shaped marks that form the indicium. Taking advantage of the presence of otherwise invisible defects in the gemstone allows for inscribing indicia with laser pulses carrying energies substantially lower than the threshold energy required for inscribing in the volume of a perfect gemstone material. The marking process is then much less susceptible to inflict damages to the surface of the gemstone, and the marking can be performed using a broad variety of femtosecond laser systems. The dot-shaped marks engraved at a depth below the surface of a gemstone can be made undetectable with the unaided eye or with a loupe by limiting their individual size to a few micrometers, while devising indicia made up of only a few marks. As a result, the marking does not detract from the appearance and value of the gemstone. The procedure for laser marking accounts for the random spatial distribution of the defects present in natural gemstones as well as for their strongly localized character. The presence of an indicium can be detected by using a dedicated optical reader that can be afforded by every jewellery store. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-D987468-S
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-D987469-S
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9314871-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006225637-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8217301-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8809733-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007285650-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9845546-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9185835-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8319145-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009269702-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9280183-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011095006-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9962788-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016129529-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10071583-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10071584-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10736388-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11008250-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020197432-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009057283-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9173336-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8879266-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020218940-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9895770-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8895345-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008006615-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7610872-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9434197-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2018310677-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11597226-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8871540-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011088924-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008304525-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8519299-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011089039-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7436498-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11395530-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10220602-B2 |
| priorityDate |
2005-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |