What is it called when a name like "kleenex" becomes the household name for all tissue?

Question

any more answers guys? Genericized wasn't the term I was looking for, although by definition that does seem correct.

Answer 1

Genericized

A genericized trademark (or trade mark), sometimes known as a generic trade mark, generic descriptor or proprietary eponym, is a trademark or brand name which is often used as the colloquial description for a particular type of product or service as a result of widespread popular or cultural usage. Where a genericized trademark becomes or replaces the common term for a product or service, the mark has become generic. Escalator and Thomas Edison's mimeograph are classic examples. In the U.K. the term hoover has long been colloquially synonymous with vacuum cleaner, owing to The Hoover Company's dominance of the U.K. vacuum cleaner market in the first half of the 20th century. That it has been more than 100 years since the first vacuum cleaners were commercially available in the U.K., and that Hoover is no longer the biggest selling brand of vacuum cleaner in the country, illustrates the depth to which generic trademarks can persist in their usage. A trademark typically becomes "genericized" when the products or services with which it is associated have acquired substantial market dominance or mind share. However, a trademark may still become genericized in the absence of significant market share through mechanisms such as viral marketing.

Answer 2

There is no one word to describe it, but it is synonymous as a household name for all tissues.
Does this make sense.

Answer 3

I think a coloquialism- not so sure though...

Answer 4

Could it be "eponym"?