Fiber optic grating transverse strain sensor system
CA 2258640 A1 · Owner: Udd, Eric · Inventors: Udd, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method to sense the application of transverse stress to an optical fiber include a light source (32) that produces a relatively wide spectrum light beam, an optical fiber (22) a grating (26) within the fiber, and a spectrum analyzer (54). The light beam is reflected off or transmitted through the optical grating in the core (24) of the optical fiber that is transversely stressed directly by exposure to pressure. When transversely stressed, the optical grating produces a reflection or transmission of the light beam that has two peaks or minimums in its frequency spectrum whose spacing and/or spread are indicative of the forces applied to the fiber. One or more detectors …
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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 September 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2019.
- 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.