Electrophotographic photoreceptor
CA 2023622 A1 · Owner: Mitsubishi Kasei Corporation · Inventors: Saita, Atsuo; Ono, Hitoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrophotographic photoreceptor comprising a photosensitive layer which contains one or more hydrazone compounds represented by the formula:, I, wherein A represents a substituted or unsubstituted aryl or heterocyclic group; R1, R2 and R5 are the same or different from each other and independently represent a hydrogen atom or a, substituted or unsubstituted alkyl or aryl group; R3 and R4 are the same or different from each other and independently represent a hydrogen atom, a halogen atom, a nitro group or a substituted or, unsubstituted alkyl alkoxy, aryl or aryloxy group; R6 represents a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl or alkoxy group; R7 …
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 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 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.