Grating-coupled surface-emitting superluminescent device
CA 2000525 C · Owner: Carlson, Nils William · Inventors: Carlson, Nils William; Evans, Gary Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A superluminescent diode has one end coupled to a grating output coupler and the other end has a reflective coating. A broad light spectrum is emitted for reduced speckle interference and phase noise when used in applications such as a gyroscope. The diode can be of the "P side down" type for good heat dissipation during continuous wave operation. Two gratings can be used in order to reduce beam divergence.
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 October 12, 1989 and granted May 10, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.