Depending on the description of the class of goods or services that you're associating the trademark with, you can register for $225 or $275. It generally takes

Depending on the description of the class of goods or services that you're associating the trademark with, you can register for $225 or $275. It generally takes six to nine months to complete the process. There are quite a few guides and videos on the Trademark Office web site that explain the process. It's fairly straightforward and pretty simple. The Nolo book cited by another commenter is also a good, comprehensive guide for the process.