Rejuvenated organic photoreceptor and method
CA 2126891 C · Owner: Murphy, William J. · Inventors: Donofrio, William A.; Snyder, Donald E. Jr.; Murphy, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of restoring a used organic photoreceptor which includes a supporting substrate having a photoconductor layer contained on said substrate and an overlaying layer of charge transport material. The photoreceptor is heated to a temperature near or above the glass transition temperature of the charge transport layer for a time sufficient to allow for flowing and/or melting of the top surface of the charge transport layer and, then cooled to room temperature, followed by applying a new layer of charge transport material over the existing charge transport layer
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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
- Filed June 28, 1994 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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.
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.