Light-receiving device
CA 2030008 C · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Tonai, Ichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a light-receiving device comprising an absorption layer formed of a semiconductor material which is capable of generating electric charges in response to an incident light, a plurality of lightdetecting regions formed in the absorption layer each, outputting an electric signal in response to an incident light signal, and a depletion region formed between the adjacent light-detecting regions for collecting electric charges generated in a portion of the absorption layer between the adjacent light-detecting regions.
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 14, 1990 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2012.
- 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.