Electrophotographic photoreceptor
CA 2090835 C · Owner: Kouno, Hisao · Inventors: Suda, Osamu; Kouno, Hisao; Higashide, Kazuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrophotographic photoreceptor is provided with a photosensitive layer, which contains an azo compound represented by the followin g general formula (1):, (see fig. I), wherein A means a coupler residuum having phenolic OH radicals R1 and, R2 designate, respectively, a radical of an integer of both, m=0~4, n, =0~4, selected from the group consisting of hydrogen halogen atoms, alkyl group, alkoxy group and di-substituted amino group, The electrophotographic photoreceptor of this invention has excellent electrification characteristics, sensitivity characteristics and image-forming property as well as good sensitivity In addition, its , sensitivity, and electrification characteristics …
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 March 2, 1993 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2015.
- 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.