Electrophoretic display panel with selective line erasure
CA 2115152 C · Owner: Disanto, Frank J. · Inventors: Disanto, Frank J.; Krusos, Denis A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrophoretic, display apparatus has grid (10) and cathode (4), conductors arranged as an X-Y matrix spaced from an, anode (14) with an electrophoretic dispersion in, between them. Pigment particles in the dispersion, become charged at selected intersection areas of the, X-Y matrix and migrate towards the anode (14) to form, a display image thereon by biasing the cathode (4), negatively with respect to the anode (14), and the display, image is erased by oppositely biasing the cathode, (4) and anode (14). The anode (14) is formed with a, multiplicity of parallel anode line segments (62), corresponding to image lines of the display, and, control circuitry is provided for individually …
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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 August 28, 1991 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2013.
- 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.