Fluid ejection device
CA 2564111 C · Owner: Hewlett-Packard Development Company, L.P. · Inventors: Benjamin, Trudy L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid ejection device comprising firing cells including a first group of firing cells (1704a-c) and a second group of firing cells (1704d-e) and control circuitry (1700). The control circuitry (1700) is configured to respond to the control signal to selectively initiate a first sequence adapted to enable the first group of firing cells (1704a-c) for activation and a second sequence adapted to enable the second group of firing cells (1704d-e) for activation.
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 April 6, 2005 and granted August 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.