Barrier structure for thermal ink-jet printheads
CA 1300972 C · Owner: Denler, Gordon D. · Inventors: Denler, Gordon D.; Taub, Howard Hyman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A three-sided barrier structure (22) comprising, three walls (24a-c), is provided in conjunction with a resistor (10) used in a thermal ink-jet printhead. Placement of the structure less than about 25 µm from the resistor results in longer resistor life and an improvement in the static bubble purging ability of the printhead. Two-slded barrier structures (14) comprising two, walls (16a-b), associated with the resistor at spacings less than about 25 µm also improve the resistor life.
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
- Granted May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.