Can I use Trademarked Names In File Extensions?

[tttyyyy22]

Can I use Trademarked Names In File Extensions?
I understand that you cannot use trademarked names in domain names but does the same apply to file extensions.

I am thinking of creating a website about chainsaws and I want to make sure that I am not infringing on anyone's trademark by using thier name in the file extension.

[ankitneuro]

please be more clear with example , by the way w3c is soon changing it's rules , after that you will have domain names like


yourdomain.yourcompany