An important concept to consider in U.S. trademark law is the "natural zone of expansion" doctrine. This principle can potentially extend the rights associated with your trademark beyond the specific goods and services listed in your application.

In essence, the natural zone of expansion doctrine anticipates the potential growth and future directions of a business. It provides protection in areas into which a company has a demonstrated intent to expand, even if it hasn't yet done so. This can protect your trademark in businesses that are a natural outgrowth of your existing operations.

For example, if you currently sell coffee beans under your trademark (International Class 030), and you have clear plans to soon launch a line of electric coffee pots (International Class 011), you could potentially assert rights against infringing use in similar goods, even if they're not currently specified in your trademark registration.

However, the natural zone of expansion doctrine has limitations. It only applies to related goods or services that are a foreseeable extension of your current offerings. Courts consider factors such as the nature of the goods or services, the company's past market conduct, and industry practices.

Although it provides additional protection, relying solely on the natural zone of expansion doctrine can be risky. If you have definite plans to expand your goods or services, it is often better to include them in your trademark application at the outset, or to file a new application when you are ready to commit to those new goods or services. Be aware that the application of this doctrine can be complex and may require the expertise of a trademark attorney to navigate successfully.