The US Patent & Trademark Office published Apple's latest trademark application for "iChat." The new filing updates the underlying International Class foundation for iChat so as to better protect it going forward. Then again, going forward may have a limited life span. Apple's new "Messages" Beta is now available for download which when installed, replaces iChat. Although Apple states that "iChat will continue to work" on certain OS versions right up to OS X Lion, it won't for those upgrading to the next iteration of OS X dubbed "Mountain Lion" that's due to be released this summer. But until iChat finally fades into the sunset, Apple wants it better protected.