Ink-jet recording head and ink-jet recording apparatus
CA 2179974 C · Owner: Komuro, Hirokazu · Inventors: Komuro, Hirokazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink-jet recording head comprises an ink flow path having a discharge opening for discharging an ink a lower layer for heat accumulation, a resistance layer provided on the lower layer a pair of wiring electrodes provided on the resistance layer for applying an electric signal to the resistance layer and an electrothermal transducer, provided corresponding to the ink flow path employing the resistance layer between the wiring electrodes as a heat-generating portion wherein the heat-generating portion has a high temperature section and a low temperature section when driven and a boundary at which the thickness of the protective layer varies is positioned on the low temperature section.
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 June 26, 1996 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2018.
- 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.