Escalator is one of many words that were originally trademarks but have become ordinary words found in dictionaries. Some other words which were originally trademarks and have now passed into common use are aspirin, autoharp, band-aids, breathalyzer, cellophane, Coke (in some areas, at least), corn flakes, cube steak, ditto, dry ice, dumpster, formica, Frisbee, granola, gunk, jeep, kerosene, Kleenex, mace, nylon, ping-pong (also an onomatopoeia), popsicle, Q-tip, rollerblade, rolodex, Scotch tape, sheetrock, spandex, styrofoam, tabloid, thermos, trampoline, yo-yo, xerox, and zipper.