Maintaining trademark rights

Trademarks rights must be maintained through actual use of the trademark. These rights will diminish over time if a mark is not actively used. In the case of a trademark registration, failure to actively use the mark, or to enforce the registration in the event of infringement, may also expose the registration itself to removal from the register after a certain period of time.

All jurisdictions with a mature trademark registration system provide a mechanism for removal in the event of such non use, which is usually a period of either three or five years. The intention to use a trade mark can be proven by a wide range of acts as shown in the Wooly Bull and Ashton v Harlee cases.

In the US, failure to use a trademark for this period of time, aside from the corresponding impact on product quality, will result in abandonment of the mark, whereby any party may use the mark. An abandoned mark is not irrevocably in the public domain, but may instead be re-registered by any party which has re-established exclusive and active use, including the original mark owner. Further, if a court rules that a trademark has become "generic" through common use (such that the mark no longer performs the essential trademark function and the average consumer no longer considers that exclusive rights attach to it), the corresponding registration may also be ruled invalid.

For example, the Bayer company's trademark "Aspirin" has been ruled generic in the United States, so other companies may use that name for acetylsalicylic acid as well (although it is still a trademark in Canada). Xerox for copiers and Band-Aid for adhesive bandages are both trademarks which are at risk of succumbing to genericide, which the respective trademark owners actively seek to prevent. In order to prevent marks becoming generic, trademark owners often contact those who appear to be using the trademark incorrectly, from web page authors to dictionary editors, and request that they cease the improper usage. The proper use of a trademark means using the mark as an adjective, not as a noun or a verb [3] [4] [5], though for certain trademarks, use as nouns and, less commonly, verbs is common. For example, Adobe sent e-mails to many web authors using the term "photoshopped" telling them that they should only use the term "modified by Adobe® Photoshop® software." Xerox has also purchased print advertisements declaring that you cannot "xerox" a document, but you can copy it on a Xerox Brand copying machine. Such efforts may or may not be successful in preventing genericism in the long run, which depends less on the mark owner's efforts and more on how the public actually perceives and uses the mark. In fact, legally it is more important that the trademark holder visibly and actively seems to attempt to prevent its trademark from becoming generic, regardless of real success.