Christmas a genericized trademark

If a product becomes so generally known by the name brand of that product eventually that name brand could lose the trademark to its name. Examples of this include Aspirin, Escalator, Yo-Yo, and Zipper. These were all name brand products when they were first introduced and last that trademark because the name became synonymous with the product.

In the small town where I work there are a number of homes that have signs out that say "Keep the Christ in Christmas". I guess Happy Holidays just isn't good enough for these people. This got me to wondering, should Christians lose their claim to Christmas given that Christmas has become synonymous with the Santa Claus and the other non Christian aspects of the commercialization of Christmas that it can hardly be associated with Christians anymore. I don't think this would ever happen but I would love to see the right flip out at the mere suggestion.

Apparently Santa didn't get the Justin Bieber tickets he asked for this Christmas!