@Sleep Deprived ... Re: @Drew...
Again, you want to refill your own ink cartridges... nothing Lexmark can do to stop you.
This issue is about a business reselling used cartridges and Lexmark is suing them by arguing a patent violation. You can look at the K-Cup lawsuits as a pattern that Lexmark can use and probably argue in court because that's what Keurig did.
To your point, once the patent expired... Keurig couldn't stop other companies offering K-Cups and with their new product... sales were kind of flat. Consumers didn't buy in to it.
Personally I have a built in Miele coffee machine that makes the perfect cup of coffee and all I need to do is to add my own beans, milk and keep the damn thing clean. :-)