Ink jet printer cartridge refilling method and apparatus
CA 2130791 C · Owner: Hewlett-Packard Company · Inventors: Cowger, Bruce; Beeson, Robert R.; Tarver, Fred E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink jet printer having a travelling ink jet pen with a foam-filled ink chamber. A separate source reservoir includes an ink outlet nozzle connectable to the pen chamber for refilling. A probe on the reservoir partially compresses the foam to decrease its ink capacity during filling. An electrical contact on the reservoir or pen detects over-filling and over-saturation of the foam to stop the filling process. As the foam is decompressed, its increased absorptive capacity accommodates any excess overflow.
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 August 24, 1994 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2016.
- 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.