Photoelectric converting device and image processing apparatus utilizing the same
CA 2059197 C · Owner: Canon Kabushiki Kaisha · Inventors: Sugawa, Shigetoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photoelectric converting device has a photoelectric converting part which consists of a light absorbing layer of a predetermined forbidden band width Eg1 and a carrier multiplying layer positioned in laminate structure between charge injection blocking layers. The multiplying layer is composed of a layer or plural layers with a stepback structure of the forbidden band width having a minimum width Eg2 and a maximum width Eg3 in alternate manner and showing a continuous variation therebetween in each layer. The charge injection blocking layers, light absorbing layer and carrier multiplying layer are composed of non-monocrystalline semiconductors and at least having the minimum forbidden …
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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 January 10, 1992 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 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.