I couldn't really find any details about any of these cases. Some of the names there too are pretty strange like "Tobaccopedia" and "Kraft LLC vs Kraft ULC". ULCs (as far as I know) are a Canadian thing and I highly doubt I can just go an open a company called "Cocacola ULC" in Canada?

Those examples look like LLM generated nonsense, though correct me if I'm wrong.

The example usually taught in school for this sort of thing is the trademark for Aspirin. Aspirin is a Bayer brand name for acetylsalicylic acid, but Bayer didn't defend its trademark in most of the world. In most countries (including the US) courts ruled that Aspirin is a generic term and anybody could use it. That's not the case for say Tylenol (acetaminophen) or Advil (ibuprofen) for example.