Diamond detection using coherent anti-stokes raman spectroscopy
CA 2418858 A1 · Owner: De Beers Consolidated Mines Limited · Inventors: Lubbe, Nicholaas Johannes Adolf; Human, Hendrik Gerhard Coenraad; Viranna, Narendra Balagury
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method and apparatus for detecting diamonds using the phenomenon of coherent anti-Stokes Raman spectroscopy (CARS). Each particle (46) which is to be analysed is irradiated by a focused particle irradiating beam (44) of laser light formed by combining initial laser beams (35 36) , having frequencies differing from one another by a value characteristic for diamond. Components of the initial laser beams are coherently phase-matched to produce, in diamond particles, a CARS signal characteristic of diamond. The scattered signal from the particle is then collected and analysed for the presence of the characteristic CARS signal. The irradiating beam and/or at …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 8, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.