The TMCH accepts any trademark which is:
- still valid in the trademark register (not expired, rejected, cancelled or withdrawn)
- in use by the trademark owner, in the class it is registered
A trademark may contain international characters, but not a combination of character sets: a Chinese trademark is accepted, a trademark having both a Chinese word and an English word will not be accepted.
An image trademark is accepted as well, as long as the image contains characters allowed in domain names.
Trademarks containing a dot (.) are not accepted. (Note: TMCH announced in July 2013 that they are working on acceptance of dots as well, as long as the dot is not part of a TLD.)
For more details, please refer to the TMCH Guidelines section 2.2.5 and section 4 (http://www.trademark-clearinghouse.com/sites/default/files/files/downloads/TMCH%20guidelines%20v1.1_0.pdf).