Photoconductor for electrophotography
CA 2080075 C · Owner: Fuji Electric Device Technology Co. Ltd. · Inventors: Komiyama, Hideki; Nogami, Sumitaka; Nakamura, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photoconductor for electrophotography comprises an electroconductive substrate, a charge generating layer formed on the substrate and a charge transporting layer formed on the charge generating layer. The charge generating layer contains particles of an organic pigment and a binder. The largest value of major axes of the particles is not more than 1000 nm, the smallest value of minor axes of the particles is not less than 10 nm and the ratio of the largest value of major axes to the smallest value of minor axes is not more than 3.
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 7, 1992 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 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.