Ink jet recording head
CA 2060047 A1 · Owner: Sasaki, Mitsuhiro · Inventors: Yoshizawa, Kouji; Sasaki, Mitsuhiro; Matsumoto, Kozo
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 in which a plurality of ink nozzles are juxtaposed on a single silicon substrate to provide a Kaiser on-demand type ink jet recording head. The ink flow paths are formed in a surface of the substrate by dry plasma etching and a glass plate is electrostatically bonded onto that surface as a vibrating plate. The surfaces of the ink flow paths are cleaned using an alkali solution and a water, repelling film is formed around the ink jetting outlets. Notch portions, each having a sectional area larger than the ink nozzle, may also be formed on the end surface between adjacent ink jetting outlets. A heater may also be positioned on a surface of the substrate on which the …
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 January 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2014.
- 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.