Inkjet Cartridges With Expiration Dates

HP inkjet cartridges -- and possibly those from other major manufactures -- have built in expiration dates. After 30 months or 4.5 years, the inkjet cartridge simply stops working. HP's site states that expired inkjet cartridges lack "optimum print quality". Businesses who purchase in bulk and store inkjet cartridges for some time before actually putting them into service will have to be weary. People who have their inkjet cartridges refilled will also want to take note.