Electrochromic device having refractive index-matched structure and methods of operating and manufacturing
CA 2115266 C · Owner: Sun Active Glass Electrochromics, Inc. · Inventors: Trumbore, Forrest A.; Parkhe, V. J.; Van Dine, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chromogenic device with a chromogenic material facing a conductive layer in which the transmission of incident radiation through the conductive layer and the chromogenic material is enhanced. The enhancement is achieved by adjusting indices of refraction of layers embracing the conductive layer.
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 September 3, 1992 and granted October 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2014.
- 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.