No, Ruby they don't -- Xerox spends alot of money being xerox and making that the company.. they do not want to have xerox=copy/copies

Nor does the Klennex company want to lose the rights to its name.. if the names are used 'genericaly' in a publications,(say in a piece of fiction) the Xerox company lawyers will sue..

"cookie and cream ice cream isn't 'oreo ice cream'-- cause oreo is a brand name, not a generic one for chocolate cookie with super sweet white icing filling..

when something is close to generic, like oreo, companies will bring out variations, to widen the meaning, and to re-enforce its right to own the "name".
an oreo by any other name is a hydrox, or something!

in Canada, ask for "asprin" and you get a Bayer brand pill. in US, any company can use the term asprin- it is no advantage to Bayer, the first company to market ASA, and the company that worked hard to "develop" a market for Asprin!