Substrate for ink jet head, ink jet head formed by use of said substrate, and ink jet apparatus equipped with said head
CA 2014819 C · Owner: Kimura, Isao · Inventors: Hasegawa, Kenji; Kimura, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink jet head for incorporation in ink jet apparatus has a substrate which incorporates an electrothermal transducer having a heat-generating resistor member which generates heat energy utilized for discharging ink in response to a signal the heat-, generating resistor member being formed of a complex compound comprising a metal element, boron silicon and, nitrogen. The metal element forms 8-31 atomic % the, boron forms 7-58 atomic %, the silicon 5-53 atomic % and nitrogen 6-45 atomic % of the compound these percentages, being preferably in the ranges 8-31 18-38, 19-35 and 18-, 38. The metal element is Ti V, Cr, Zr, Nb, Mo, Hf, Ta, or W.
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 18, 1990 and granted January 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 2012.
- 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.