Electrochromic material and method of making an electrochromic material
CA 2000880 A1 · Owner: Ford Motor Company Of Canada, Limited · Inventors: Demiryont, Hulya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23-, Abstract, This specification discloses reduced tungsten oxide electrochromic material, useful in an electrochromic device, having excellent electrochromic properties. The oxidation number of the tungsten of the material as deposited on a support of the device in a stable bleached condition is, on average between +5.99, and +5.80. The material may be made by reducing fully oxidized tungsten oxide by a reducing agent. The reducing agent may be a metal or a metal oxide. 2132K
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 October 17, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2011.
- 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.