Scanning near-field optical microscope
CA 2229221 A1 · Owner: Tomita, Eisuke · Inventors: Tomita, Eisuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scanning near-field optical microscope having an optical waveguide probe 1 provided with a microscopic aperture portion having a diameter less than a wavelength at its tip, a vibration application portion consisting of a piezoelectric vibrating body 2 and an AC voltage-generating portion 3, a vibration-detecting means consisting of a quartz oscillator 4 and a current/voltage amplifier circuit 5, a coarse displacement means 6 for bringing the optical waveguide probe close to a surface of a sample an optical, detection means consisting of lenses 7 8 and a, photodetector 9, a sample-to-probe distance control means consisting of a Z motion fine adjustment device 11 and a Z servo circuit 12, a …
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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 March 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.