Electrophotographic photosensitive element and process of producing the same
CA 2028601 C · Owner: Hanatani, Yasuyuki · Inventors: Nakatani, Kaname; Hanatani, Yasuyuki; Mizuta, Yasufumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrophotographic photosensitive, element having a layer containing polyvinyl acetal wherein the layer is formed by coating a coating composition containing the polyvinyl acetal and being compounded with a solution comprising an acetylacetone complex salt, an alcohol and water and a process of producing an electrophotographic photosensitive element having a layer containing polyvinyl acetal, wherein the layer is provided by the steps of:, preparing (A) a solution of an acetylacetone complex salt dissolved in a mixed solvent of an alcohol and water, and (B) a solution containing polyvinyl acetal;, mixing the solutions (A) and (B) to provide a coating composition (C);, coating the …
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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 October 25, 1990 and granted November 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.