Electro-active spectacles and method of fabricating same
CA 2586235 C · Owner: Blum, Ronald D. · Inventors: Blum, Ronald D.; Kokonaski, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite lens assembly comprising an electro-active lens assembly a first , lens wafer, and a second lens wafer is provided. The electro-active lens assembly has an upper substrate layer with a planar upper surface and a lower substrate layer with a planar lower surface. The first lens wafer has a planar lower wafer surface adjacent and parallel to the planar upper surface of the upper substrate layer of the electro-active lens assembly. The second lens wafer has a planar upper wafer surface adjacent and parallel to the planar lower surface of the lower substrate layer of the electro-active lens assembly.
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 November 1, 2005 and granted June 3, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.