Could happen. Wikipedia has a list of trademarks formally lost for becoming generic: Aspirin, Catseye, Cellophane, Dry ice, Escalator, Flip phone, Flit gun, Heroin, Kerosene, Lanolin, Laundromat, Linoleum, Mimeograph, Sellotape, Spidola, Teleprompter, Thermos, Trampoline, Videotape.
Xerox is still fighting becoming generic. 3M continues to fight on for "Scotch tape".
Xerox is still fighting becoming generic. 3M continues to fight on for "Scotch tape".