Plenty of examples where the trademark becomes the term for the generic act or product, though trademark holders hate this. Thermos, instead of vacuum flask, Kleenex, instead of disposable handkerchief, Aspirin, instead of acetylsalicylic acid, Band-aids instead of adhesive bandage. Googling and to Google instead of using an online search engine, etcetera, etcetera. Some of these have entered common speech to the degree that they can no longer be trademarked at all, and the companies fight tooth and nail for the rest.
There used to be a long-running educational kid's TV programme in the UK called
Blue Peter. It often had a segment showing the audience how to make something out of junk and household items, usually a low-cost version of a current, popular toy such as Tracy Island (though Advent Crowns would crop up with monotonous regularity). Because it was on the BBC, advertising wasn't allowed, so they used to black out the brand names on the cereal packets and washing-up liquid bottles they utilised. They also used to talk about using 'sticky-backed plastic' to secure everything. This term was so ubiquitous that it became a running joke in the UK whenever anyone mentioned the programme or interviewed one of the former presenters. It was years before I realised they were talking about Sellotape!
Why they didn't just use the more obvious, generic term 'sticky tape' baffles me to this day.
