Electrophoretic display panel and associated methods providing single pixel erase capability
CA 2130753 C · Owner: Copytele, Inc. · Inventors: Krusos, Denis A.; Disanto, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tetrode type electrophoretic display (10) includes local anode lines (32) disposed perpendicular to the grid lines (20) and having a tined configuration (33). In operation the local anode (32) may be, used to write and erase selected independent pixels by applying appropriate voltages (36) to the various electrodes (26 28, 20, 18, 32) of, the display in the proper sequence. The tetrode employed preferably includes an intermediate mesh (28) to permit maintaining displayed images after power removal.
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 January 29, 1993 and granted July 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2015.
- 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.