HP Officejet Pro 8500A - Manual (Page 160)

Ink cartridge warranty information
The HP cartridge warranty is applicable when the product is used in its designated HP printing
device. This warranty does not cover HP ink products that have been refilled, remanufactured,
refurbished, misused, or tampered with.
During the warranty period the product is covered as long as the HP ink is not depleted and the
end of warranty date has not been reached. The end of warranty date, in YYYY-MM format, may
be found on the product as indicated:
Appendix A
156 Technical information