Whispering mode micro-resonator
CA 2068899 C · Owner: American Telephone And Telegraph Company · Inventors: Mccall, Samuel Leverte
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Device for electromagnetic emission depends on total internal reflection- on whispering gallery mode cavitation about the periphery of a disc-shaped element of sub-wavelength thickness. Operating above lasing threshold the design is, alternative to that of the Surface Emitting Laser for integration in integrated circuitry - either all-optic or electro-optic. Operating below threshold it may serve as a Light, Emitting Diode.
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 May 19, 1992 and granted June 17, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2014.
- 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.