Electrophoretic migration imaging process with neutral density bisazo naphthalenediol pigments
CA 1098357 A · Owner: Eastman Kodak Company · Inventors: Rossi, Louis J.; Regan, Michael T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention An improved electrophoretic imaging process is provided wherein the improvement comprises the use of electrostatic charge-bearing particles having an electrically photosensitive pigment which is the reaction product of 2,3naphthalenediol and a diazonium salt. Preferred pigments have the following structure:, wherein:, R1 is a lower alkoxy group or -OCH2CONH2; R2 is H or NO2; and, R3 is H or -SO2NH2.
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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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.