Wikipedia Reference Information
A genericized trademark, generic trade mark, generic descriptor, or proprietary eponym, is a trademark or brand name which has become the colloquial or generic description for or synonymous with a particular class of product or service. Classic examples include escalator, Frisbee, Xerox (photocopying) (U.S.), Band-Aid (adhesive bandages) (U.S.), Hoover (Vacuum cleaner) (U.K.) and Kleenex (facial tissues) (for other examples see List of generic and genericized trademarks).
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.
The complete, up-to-date and editable article about Genericized Trademark can be found at Wikipedia: Genericized Trademark