Fun fact: Novo Nordisk's first success was selling insulin, which was discovered in Canada and licensed by the Scientists who's discovered it for free to the danish company in exchange for a promise to use the revenues "for good purposes". Hopefully this patent SNAFU makes up for 1% of that monumental screw job.
There are many different kinds of insulin now, and almost nobody uses the original version, because it's tricky to get timing and dosage right. All with their own patent situation, of course.
Kind of crazy considering how many people have diabetes.