I am a crafter who specializes in recycling things people throw away and I write tutorials on how people can do it at home. Sometimes I like to give the crafts names. Here is a wacky (hypothetical) example: I cut up old t-shirts to make yarn and knit them into reusable, washable tissues. If I call them Teenex is that trademark infringement on the word Kleenex?Thank you for all the answers. Creating a spin-off name for the upcycled version of something seems to be a trend. Tarn and Plarn are used to convey Yarn made from old t-shirt (tarn) and from plastic bags (Plarn) ... though "Yarn" is not a trademarked word. Lesson - we upcycling crafters need to be careful - I can guarantee that none of us make enough money to hire a legal team .