Patent Yard Sign in
Expired Canadian patentCanada

Layered photoreceptor with overcoatings containing hydrogen bonded materials

CA 2118345 C · Owner: Renfer, Dale S. · Inventors: Defeo, Paul J.; Yanus, John F.; Limburg, William W.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

An electrophotographic imaging member comprising a substrate, a charge generating layer, a charge transport layer and an, overcoat layer comprising a small molecule hole transporting arylamine having at least two hydroxy functional groups a hydroxy or multihydroxy, triphenyl methane and a polyamide film forming binder capable of forming hydrogen bonds with the hydroxy functional groups the hydroxy arylamine and hydroxy or multihydroxy triphenyl methane. This overcoat layer may be fabricated using an alcohol solvent. This electrophotographic imaging member may be utilized in an electrophotographic imaging process.

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 18, 1994 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 18, 1994
GrantedNovember 16, 1999
Term endedOctober 18, 2014
Patent numberCA 2118345 C
Classification (IPC)G03G5/14 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedOct 18, 1994Patent grantedNov 16, 1999Term endedOct 18, 2014

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.