Polybis(aminostyryl)aryl compounds for photoconductive elements
CA 1101878 A · Owner: Eastman Kodak Company · Inventors: Berwick, Martin A.; Wright, Hal E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymeric compounds having utility in multiactive photoconductive insulating elements. Such elements have at least two layers comprising an aggregate photoconductive layer in electrical contact with a photoconductorcontaining layer. The aggregate photoconductive layer comprises at least one novel polymeric compound having the structure: wherein, R1, and R3, which may be the same or different represent a substituted or unsubstituted alkyl group having from 1 to 18 carbon atoms or a substituted or unsubstituted aryl group;, R2, and R4, which may be the same or different represent an alkylene group having from 2 to 10 carbon atoms or a substituted or unsubstituted arylene group; R5 and …
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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
- Granted May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 1998.
- 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
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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.