Three port resonant optical cavity
CA 2256963 A1 · Owner: Copner, Nigel · Inventors: Copner, Nigel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An etalon is used in a new manner wherein two output signals from two opposing etalon, end faces are provided to a combiner where the two signals are allowed to interfere with, each other to produce one or more filtered output beams of light. Preferably the phase, relationship between the two etalon output signals is varied to offset a phase shift that, occurs when the signals are combined.
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 December 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2020.
- 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.