Lightwave phase control for reduction of resonator fiber optic gyroscope kerr effect error
CA 2184496 C · Owner: Honeywell Inc. · Inventors: Sanders, Glen A.; Strandjord, Lee K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An error reducer for reducing rotation rate errors arising because of an optical Kerr effect occurring in a coiled optical fiber in a rotation sensor. Through amplitude modulating electromagnetic waves propagating in that coil. A signal obtained from the coil based on the amplitude modulation component therein is used in a feedback loop to reduce or eliminate such errors.
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 March 10, 1995 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2017.
- 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.