Ink jet head, ink jet cartridge by use of said head and ink jet recording apparatus by use of said cartridge
CA 2009233 C · Owner: Nakagomi, Hiroshi · Inventors: Karita, Seiichiro; Maeoka, Kunihiko; Nakagomi, Hiroshi
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 for ink jet recording apparatus has a substrate at least partially defining both discharge ports for discharging ink and ink passages which provide access for the ink discharged from the discharge ports, the substrate having a heat energy generating member for generating heat energy used for discharging ink from the discharge ports. The head also includes an ink storage portion for storing ink to be discharged from said discharge ports, which is insert moulded integrally with the substrate. The recording head may be incorporated in an ink jet cartridge including an ink tank.
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 February 2, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.