Similarly, manufacturer. So, for example, the term “thermos”

Similarly, where the rights to a trademark are assigned to another party in gross, without the corresponding sale of any assets, the trademark will be canceled. The rationale for these rules is that, under these situations, the trademark no longer serves its purpose of identifying the goods of a particular provider.

Trademark rights can also be lost through generosity. Sometimes, trademarks that are originally distinctive can become generic over time, thereby losing its trademark protection.

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A word will be considered generic when, in the minds of a substantial majority of the public, the word denotes a broad genus or type of product and not a specific source or manufacturer.

So, for example, the term “thermos” has become a generic term and is no longer entitled to trademark protection. Although it once denoted a specific manufacturer, the term now stands for the general type of product.

Similarly, both “aspirin” and “cellophane” have been held to be generic. In deciding whether a term is generic, courts will often look to dictionary definitions, the use of the term in newspapers and magazines, and any evidence of attempts by the trademark owner to police its mark.