Ink jet recording apparatus
CA 2108304 C · Owner: Arashima, Teruo · Inventors: Kashino, Toshio; Ishinaga, Hiroyuki; Masuda, Kazuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink jet recording apparatus includes an orifice for ejecting ink; a heater for generating thermal energy to produce a bubble to eject the ink; an ink passage for supplying ink to the orifice the, ink passage being provided with the heater; an ink container for containing ink to be supplied to the ink passage, the ink container retaining the ink using, capillary force; wherein the following is satisfied: V OH > V'Me + Vd, where V OH is a volume of the ink passage from the orifice to an edge of the heater adjacent the orifice; V'Me is a volume of a meniscus retraction at an initial ink ejection; and Vd is a volume of ejected ink.
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 October 13, 1993 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 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.