Our ink cartridges do not have expiration dates; if you are having difficulty with the ink purchased for the printer, we ask that you please contact a Canon technical support representative here for further assistance. A representative will be happy to assist you free of charge.
I do not believe there are no manufactured date codes.
Look at the picture...what is "1716L24"?
I just got a BC-20 cartridge, with a dot-matrix code "6DO2D11" printed on its box.
Your statement that there are no codes are not believable in the face of apparent contradiction.
Care to elucidate?