An illuminated device
CA 2490053 A1 · Owner: Graham, Morton · Inventors: Graham, Morton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An illuminated device (10) comprises a light source (15) and an illumination plate (16), having a first face (18) and a second face (20) separated by , edges (22, 24, 26 and 28) and a diffusion cover (32), having an inner surface (34). The diffusion cover (32) overlies the illumination plate (16) and is shaped to form an enclosure (38) defined by the inner surface (34) and the first face (18). The light source (15) delivers light into the illumination plate via the edges (22, 24, 26 and 28). The light undergoes scattering or primary diffusion within the plate, before emerging from the first face (18) at shallow angles, into the enclosure (38). A reflective layer (44) prevents light …
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 June 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2024.
- 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.