Optical article with anti-reflecting coating, corresponding coating material and coating method
CA 2285944 A1 · Owner: Corning S.A. · Inventors: Guzman, Guillermo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an optical article which comprises a mineral substrate and an anti-reflecting coating on at least one surface of said mineral substrate. In a characteristic way said mineral substrate has a , refractive index between 1.5 and 1.9 and said anti-reflecting coating is a single layer, nanoporous/nanograin structured coating obtained by heat-, treating a sol-gel film constituted of strongly interconnected inorganic , polymers, also linked with inorganic particles said polymers forming a tri-, dimensional network which has the general formula M-OH/M-O-M in which M , represents a metal or a metalloid advantageously selected from silicon, aluminium zirconium, titanium and …
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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 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.