Photocatalyst and process for producing the same
CA 2479688 A1 · Owner: Atarashi, Takafumi · Inventors: Tohji, Kazuyuki; Atarashi, Takafumi; Kishimoto, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photocatalyst which has high catalytic activity is nontoxic, has a long , life, enables visible light to be utilized as it is in a photocatalytic reaction, and is useful especially in hydrogen generation; and a process for producing the catalyst. The catalyst is characterized by containing cadmium sulfide, having a capsular structure, and has platinum deposited thereon. The process comprises bubbling H2S gas into a liquid containing cadmium oxide particles.
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 August 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 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.