Binos,
I can tell you that some cartridges work fine YEARS after their sell-by date! I had an early Epson personal Laser printer that I bought new in 1993.
I was still using it (and the original toner cartridge) 10 years later. I finally abandoned it (with a 1/4 full cartridge) in 2003 as I couldn't get a memory upgrade for it any longer - and 512KB just wasn't able to cope.
SD