My HP8600 quit on me. Had to replace my printer.Was working great and all of sudden it quit.These cartridges are brand new (out of the box) The 2 black cartridges have expiration dates of 3/2015 and 5/2024, I never realized they had expiration dates until I started to research to put them on .The 951's all have an expiration on 2/2026, I had just purchased them because the 3 in the printer were getting low.I will also include the 3 cartridges that are used that I took out of the printer prior to throwing the printer away. There is not a lot left but working 1 used HP950XL exp 7/2023, 1 used Cyan and magenta both expires 4/2024.