Semiconductor device, ink tank provided with such semiconductor device, ink jet cartridge, ink jet recording apparatus, method for manufacturing such semiconductor device, and communication system, method for controlling pressure, memory for controlling pressure, memory element, security system of ink jet recording apparatus

Read the whole patent

Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

Why it's free to use

• Filed April 12, 2001 and granted November 4, 2009. A European patent lasts at most 20 years from filing, so its term ended April 12, 2021.
• A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by October 12, 2026.
• We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.