Here is a list of surprising brand names that became generic terms:
A company's biggest fear is that their brand name becomes so commonly used to describe a product that a judge rules that it's too "generic" to be a trademark. That means that any product — even inferior ones — can legally use the name. A brand usually is declared legally generic after a company sues another firm for using its name and the case goes to a federal court. Drug maker Bayer lost trademarks for the names "aspirin" and "heroin" this way in the 1920s. So did B.F. Goodrich, which sued to protect its trademark of "zipper" in the 1920s after the name joined the world of common nouns. Similar cases deemed "escalator" generic in 1950, "thermos" generic in 1963 and "yo-yo" generic in 1965. . . .
Did you know that "escalator" was originally a brand name?
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