Aluminium reflector with composite reflectivity-enhancing surface layer
CA 2208302 C · Owner: Gillich, Volkmar · Inventors: Gillich, Volkmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Reflector having a composite reflectivity-enhancing layer as reflecting surface layer on a, reflector body where the said composite layer has an outer layer facing the radiation to be, reflected, the HI-layer with a refractive index n2, and, between the reflector body and the, outer layer, an LI-layer with a refractive index n1 which is smaller than n2 and the LI and HI, layers are .lambda./4 layers. The HI layer is a sol-gel layer and the optical layer thickness d opt,1 of, the LI layer and d opt,2 of the HI layer are such that d opt,i = d i.n i=l i..lambda./4 ~20 nm i = 1 or 2, where d1 represents the thickness of the LI layer in nm d2 the thickness of , the HI layer in, nm .lambda. …
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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 June 19, 1997 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 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.